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Đề luyện thi THPT Quốc Gia - Năm 2020 Môn thi: TIẾNG ANH (Đề số 11)

Trắc nghiệm tiếng anh Thi tốt nghiệp

Tổng câu hỏi:50
Thời gian làm: 01:00:00

Tổng câu hỏi: 50

Thời gian làm: 01:00:00

T
Câu 1 (0.2đ)

Mark the letter A, B, C or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

He didn’t know who it was and couldn’t imagine why they did it, but there must have been somebody that started the rumor which he was from London and very wealthy.

  • A.

    which

  • B.

    who

  • C.

    why

  • D.

    that

Chưa có lời giải

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Câu 25 (0.2đ)

Mark the letter A, B, C or D on your answer sheet to indicate the word(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions.

Earthworms help to aeratethe soil.

  • A.

    suffocate

  • B.

    destroy

  • C.

    argue

  • D.

    adjust

Chưa có lời giải

Câu 26 (0.2đ)

Mark the letter A, B, C or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.

Wouldn’t it better to let them know about the alterations to the plan?

  • A.

    Don’t you think they should be informed about the changes in the plan?

  • B.

    Shouldn’t they have been consulted before the scheme was changed?

  • C.

    Why haven’t they been informed about the new development?

  • D.

    We’d better ask them to change the plan, hadn’t we?

Chưa có lời giải

Câu 27 (0.2đ)

Mark the letter A, B, C or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

It is believed that in the near future robots will be used to doing things such as cooking.

  • A.

    such as

  • B.

    in the near future

  • C.

    It is believed

  • D.

    be used to doing

Chưa có lời giải

Câu 28 (0.2đ)

Mark the letter A, B, C or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

A severe illness when she was just nineteen months old deprived the well–known writer and lecturer Helen Keller from both her sight and hearing.

  • A.

    just

  • B.

    deprived

  • C.

    when

  • D.

    from both

Chưa có lời giải

Câu 29 (0.2đ)

Mark the letter A, B, C or D on your answer sheet to indicate the most suitable response to complete each of the following exchanges.

Peter: “How are you today?” – Susan: “_______”

  • A.

    I feel like a million stars.

  • B.

    I feel like a million dollars.

  • C.

    I can feel it in my bone.

  • D.

    I feel your ears burning.

Chưa có lời giải

Câu 30 (0.2đ)

Read the passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions. 

Dark matter in the universe is believed by some scientists to be a substance that is not readily observable because it does not directly refract light or energy. Its existence can only be deduced because of the effect that it has on surrounding matter. In fact, some members of the scientific community have argued that dark matter does not actually exist. Others, however, believe in its existence, in part because the scientific community does not have a complete understanding of gravita science. On the other hand, some would argue that it is the understanding of gravitational science that leads most scientists to believe in the existence of dark matter, because without dark matter, there are many cosmological phenomena that are difficult to explain. 

For example, dark matter in the universe may have a peculiar effect on the Milky Way galaxy. Some scientists believe that the interaction between dark matter and other smaller, nearby galaxies is causing the Milky Way galaxy to take on a warped profile. It has been asserted that not only does dark matter exist, it may also be responsible for the Milky Way’s unusual shape. The interaction referenced involves two smaller galaxies near the Milky Way, called Magellanic clouds, moving through an enormous amount of dark matter, which, in effect, enhances the gravitational pull that the two Magellanic clouds could have on the Milky Way and other surrounding bodies. Without the existence of the dark matter, the Magellanic clouds would not have sufficient mass to have such a strong effect on the bend of the Milky Way galaxy. 

The strongest evidence for the validity of this hypothesis rests in Newtonian physics, and the hypothesis that anything with mass will exert a gravitational pull. The Milky Way and other galaxies with peculiar warped shapes are being molded by a gravitational force. However, there is nothing readily observable with sufficient mass that could cause such a high level of distortion via gravitational pull in the vicinity of the Milky Way. Therefore, something that is not easily observed must be exerting the necessary force to create the warped shape of the galaxy. 

Aaron Romanowsky and several colleagues have questioned the effect that dark matter might have on galaxies. They point to the existence of several elliptical galaxies surrounded by very little dark matter as evidence that dark matter is not, in fact, the cause of the warped galaxies. While they do not claim that their findings should be interpreted to conclude that dark matter does not exist, they apparently believe that the results of their studies cast doubt on some of the conventional theories of galaxy formation and manipulation. 

Several models constructed by researchers from the University of California at Berkeley, however, point to the idea that dark matter is the most likely explanation for the distorted shape of the Milky Way and other galaxies. Using computer models, they have mapped the likely interactions between certain galaxies and the surrounding dark matter, and those models have shown not only the possibility that dark matter is responsible for the warped shape of the Milky Way, but that the relationship between the dark matter and the Magellanic clouds is dynamic; the movement of the clouds through the dark matter seems to create a wake that enhances their gravitational influence on the Milky Way. 

What does the passage offer as evidence for the existence of dark matter?

  • A.

    A photograph taken with the aid of a refracting telescope.

  • B.

    The enormous mass of Magellanic clouds.

  • C.

    The shape of the Milky Way galaxy.

  • D.

    A complete understanding of gravitational science.

Chưa có lời giải

Câu 31 (0.2đ)

Mark the letter A, B, C or D on your answer sheet to indicate the word(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions.

He was imprisoned because he revealedsecrets to the enemies.

  • A.

    disowned

  • B.

    declared

  • C.

    betrayed

  • D.

    concealed

Chưa có lời giải

Câu 32 (0.2đ)

Read the passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions. 

Dark matter in the universe is believed by some scientists to be a substance that is not readily observable because it does not directly refract light or energy. Its existence can only be deduced because of the effect that it has on surrounding matter. In fact, some members of the scientific community have argued that dark matter does not actually exist. Others, however, believe in its existence, in part because the scientific community does not have a complete understanding of gravita science. On the other hand, some would argue that it is the understanding of gravitational science that leads most scientists to believe in the existence of dark matter, because without dark matter, there are many cosmological phenomena that are difficult to explain. 

For example, dark matter in the universe may have a peculiar effect on the Milky Way galaxy. Some scientists believe that the interaction between dark matter and other smaller, nearby galaxies is causing the Milky Way galaxy to take on a warped profile. It has been asserted that not only does dark matter exist, it may also be responsible for the Milky Way’s unusual shape. The interaction referenced involves two smaller galaxies near the Milky Way, called Magellanic clouds, moving through an enormous amount of dark matter, which, in effect, enhances the gravitational pull that the two Magellanic clouds could have on the Milky Way and other surrounding bodies. Without the existence of the dark matter, the Magellanic clouds would not have sufficient mass to have such a strong effect on the bend of the Milky Way galaxy. 

The strongest evidence for the validity of this hypothesis rests in Newtonian physics, and the hypothesis that anything with mass will exert a gravitational pull. The Milky Way and other galaxies with peculiar warped shapes are being molded by a gravitational force. However, there is nothing readily observable with sufficient mass that could cause such a high level of distortion via gravitational pull in the vicinity of the Milky Way. Therefore, something that is not easily observed must be exerting the necessary force to create the warped shape of the galaxy. 

Aaron Romanowsky and several colleagues have questioned the effect that dark matter might have on galaxies. They point to the existence of several elliptical galaxies surrounded by very little dark matter as evidence that dark matter is not, in fact, the cause of the warped galaxies. While they do not claim that their findings should be interpreted to conclude that dark matter does not exist, they apparently believe that the results of their studies cast doubt on some of the conventional theories of galaxy formation and manipulation. 

Several models constructed by researchers from the University of California at Berkeley, however, point to the idea that dark matter is the most likely explanation for the distorted shape of the Milky Way and other galaxies. Using computer models, they have mapped the likely interactions between certain galaxies and the surrounding dark matter, and those models have shown not only the possibility that dark matter is responsible for the warped shape of the Milky Way, but that the relationship between the dark matter and the Magellanic clouds is dynamic; the movement of the clouds through the dark matter seems to create a wake that enhances their gravitational influence on the Milky Way. 

The word “they” in paragraph 5 refers to:

  • A.

    models

  • B.

    researchers

  • C.

    interactions

  • D.

    galaxies

Chưa có lời giải

Câu 33 (0.2đ)

Reading the following passage and mark the letter A, B, C or D on you answer sheet to indicate the correct word for each of the blanks.

The growth of cities, the construction of hundreds of new factories, and the spread of railroads in the United States before 1850 had increased the need for better illumination. But the lighting in American homes had improved very little over that of ancient times. Through the colonial period, homes were lit with tallow candles or with a lamp of the kind used in ancient Rome – a dish of fish oil or other animal or vegetable oil in which a twisted rag served as a wick. Some people used lard, but they had to heat charcoal underneath to keep it soft and burnable. The sperm whale provided superior burning oil, but this was expensive. In 1830 a new substance called “camphene” was patented, and it proved to be an excellent illuminant. But while camphene gave a bright light it too remained expensive, had an unpleasant odor, and also was dangerously explosive.

Between 1830 and 1850, it seemed that the only hope for cheaper illumination in the United States was the wider use of gas. In the 1840s, American gas manufacturers adopted improved British techniques for producing illuminating gas from coal. But the expense of piping gas to the consumer remained so high that until the mid–nineteenth century gas lighting was feasible only in urban areas, and only for public buildings for the wealthy. In 1854, a Canadian doctor, Abraham Gesner, patented a process for distilling a pitch like mineral found in New Brunswick and Nova Scotia that produced illuminating gas and an oil that he called “kerosene” (from “keros”, the Greek word for wax, and “ene” because it resembledcamphene). Kerosene, though cheaper than camphene, had an unpleasant odor, and Gesner never made his fortune from it. But Gesner had aroused a new hope for making illuminating oil from a product coming out of North American mines.

The word “resembled” in paragraph 2 is closest in meaning to _______.

  • A.

    cost the same as

  • B.

    was made from

  • C.

    sounded like

  • D.

    was similar to

Chưa có lời giải

Câu 34 (0.2đ)

“Why is your street such a mess?” – “Oh, the council _______ up the road, but they should finish this weekend?” 

  • A.

    is digging

  • B.

    had been digging

  • C.

    dug

  • D.

    have been digging

Chưa có lời giải

Câu 35 (0.2đ)

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks.

Culture has a strong influence on non–verbal communication. Even the simple act of looking someone in the eye is not at all that simple. In the USA, Americans are (5) ______ to look directly at people when speaking to them. It shows interest in what they are saying and is thought to carry a (6) ______ of honesty. Meanwhile, in Japan and Korea, people avoid long periods of eye contact. It is considered more polite to look to the side during a conversation. The Lebanese, (7) ______, stand close together and look intensely into each other's eyes. The action shows sincerity and gives people a better sense of what their counterparts want. Given such differences with even the most common expressions, people (8) ______ travel or work abroad have a real need to learn the other culture's body language. People tend to be unaware of the messages they are sending to others. So, it is (9) ______ to consider your own body language before dealing with people from other cultures. Knowing about the body language of friends, clients, and colleagues can be very helpful in improving understanding and avoiding miscommunication.

Điền vào ô số 7

  • A.

    therefore

  • B.

    in addition

  • C.

    in contrast

  • D.

    moreover

Chưa có lời giải

Câu 36 (0.2đ)

I believe that judges should be independent _______ the government.

  • A.

    of 

  • B.

    to 

  • C.

    with

  • D.

    on

Chưa có lời giải

Câu 37 (0.2đ)

The escaping prisoner camped in _______ woods but he didn’t light _______ fire because _______ smoke rising from the wood might attract _______ attention.

  • A.

    the/a/–/–

  • B.

    a/the/the/– 

  • C.

    the/a/–/the

  • D.

    a/a/–/–

Chưa có lời giải

Câu 38 (0.2đ)

The goal is to make higher education available to everyone who is willing and capable _______ his financial situation.

  • A.

    with reference to

  • B.

    regardless of 

  • C.

    in terms of 

  • D.

    owing to

Chưa có lời giải

Câu 39 (0.2đ)

Read the passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.

Dark matter in the universe is believed by some scientists to be a substance that is not readily observable because it does not directly refract light or energy. Its existence can only be deduced because of the effect that it has on surrounding matter. In fact, some members of the scientific community have argued that dark matter does not actually exist. Others, however, believe in its existence, in part because the scientific community does not have a complete understanding of gravita science. On the other hand, some would argue that it is the understanding of gravitational science that leads most scientists to believe in the existence of dark matter, because without dark matter, there are many cosmological phenomena that are difficult to explain. 

For example, dark matter in the universe may have a peculiar effect on the Milky Way galaxy. Some scientists believe that the interaction between dark matter and other smaller, nearby galaxies is causing the Milky Way galaxy to take on a warped profile. It has been asserted that not only does dark matter exist, it may also be responsible for the Milky Way’s unusual shape. The interaction referenced involves two smaller galaxies near the Milky Way, called Magellanic clouds, moving through an enormous amount of dark matter, which, in effect, enhances the gravitational pull that the two Magellanic clouds could have on the Milky Way and other surrounding bodies. Without the existence of the dark matter, the Magellanic clouds would not have sufficient mass to have such a strong effect on the bend of the Milky Way galaxy. 

The strongest evidence for the validity of this hypothesis rests in Newtonian physics, and the hypothesis that anything with mass will exert a gravitational pull. The Milky Way and other galaxies with peculiar warped shapes are being molded by a gravitational force. However, there is nothing readily observable with sufficient mass that could cause such a high level of distortion via gravitational pull in the vicinity of the Milky Way. Therefore, something that is not easily observed must be exerting the necessary force to create the warped shape of the galaxy. 

Aaron Romanowsky and several colleagues have questioned the effect that dark matter might have on galaxies. They point to the existence of several elliptical galaxies surrounded by very little dark matter as evidence that dark matter is not, in fact, the cause of the warped galaxies. While they do not claim that their findings should be interpreted to conclude that dark matter does not exist, they apparently believe that the results of their studies cast doubt on some of the conventional theories of galaxy formation and manipulation. 

Several models constructed by researchers from the University of California at Berkeley, however, point to the idea that dark matter is the most likely explanation for the distorted shape of the Milky Way and other galaxies. Using computer models, they have mapped the likely interactions between certain galaxies and the surrounding dark matter, and those models have shown not only the possibility that dark matter is responsible for the warped shape of the Milky Way, but that the relationship between the dark matter and the Magellanic clouds is dynamic; the movement of the clouds through the dark matter seems to create a wake that enhances their gravitational influence on the Milky Way. 

The passage supports which of the following statements about dark matter?

  • A.

    Its presence is readily observable to researchers who completely understand how to apply gravitational science.

  • B.

    If it does not exist, the universe is largely empty.

  • C.

    Its existence is inferred by some researchers based on observations of cosmological bodies composed of ordinary matter.

  • D.

    Its existence has been conclusively proven by computer models.

Chưa có lời giải

Câu 40 (0.2đ)

Mark the letter A, B, C or D on your answer sheet to indicate the word that differs from the other three in the position of primary stress in each of the following questions.

  • A.

    analyst

  • B.

    interview

  • C.

    technician

  • D.

    fabulous

Chưa có lời giải

Câu 41 (0.2đ)

Reading the following passage and mark the letter A, B, C or D on you answer sheet to indicate the correct word for each of the blanks.

The growth of cities, the construction of hundreds of new factories, and the spread of railroads in the United States before 1850 had increased the need for better illumination. But the lighting in American homes had improved very little over that of ancient times. Through the colonial period, homes were lit with tallow candles or with a lamp of the kind used in ancient Rome – a dish of fish oil or other animal or vegetable oil in which a twisted rag served as a wick. Some people used lard, but they had to heat charcoal underneath to keep it soft and burnable. The sperm whale provided superior burning oil, but this was expensive. In 1830 a new substance called “camphene” was patented, and it proved to be an excellent illuminant. But while camphene gave a bright light it too remained expensive, had an unpleasant odor, and also was dangerously explosive.

Between 1830 and 1850, it seemed that the only hope for cheaper illumination in the United States was the wider use of gas. In the 1840s, American gas manufacturers adopted improved British techniques for producing illuminating gas from coal. But the expense of piping gas to the consumer remained so high that until the mid–nineteenth century gas lighting was feasible only in urban areas, and only for public buildings for the wealthy. In 1854, a Canadian doctor, Abraham Gesner, patented a process for distilling a pitch like mineral found in New Brunswick and Nova Scotia that produced illuminating gas and an oil that he called “kerosene” (from “keros”, the Greek word for wax, and “ene” because it resembledcamphene). Kerosene, though cheaper than camphene, had an unpleasant odor, and Gesner never made his fortune from it. But Gesner had aroused a new hope for making illuminating oil from a product coming out of North American mines.

What can be inferred about the illuminating gas described in the passage?

  • A.

    It had an unpleasant smell.

  • B.

    It was not allowed to be used in public buildings.

  • C.

    It was not widely available until mid–nineteenth century. 

  • D.

    It was first developed in the United States.

Chưa có lời giải

Câu 42 (0.2đ)

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks.

Culture has a strong influence on non–verbal communication. Even the simple act of looking someone in the eye is not at all that simple. In the USA, Americans are (5) ______ to look directly at people when speaking to them. It shows interest in what they are saying and is thought to carry a (6) ______ of honesty. Meanwhile, in Japan and Korea, people avoid long periods of eye contact. It is considered more polite to look to the side during a conversation. The Lebanese, (7) ______, stand close together and look intensely into each other's eyes. The action shows sincerity and gives people a better sense of what their counterparts want. Given such differences with even the most common expressions, people (8) ______ travel or work abroad have a real need to learn the other culture's body language. People tend to be unaware of the messages they are sending to others. So, it is (9) ______ to consider your own body language before dealing with people from other cultures. Knowing about the body language of friends, clients, and colleagues can be very helpful in improving understanding and avoiding miscommunication.

Điền vào ô số 9

  • A.

    usefulness

  • B.

    useful

  • C.

    useless

  • D.

    used

Chưa có lời giải

Câu 43 (0.2đ)

The fussy child ate only a few _______ of noodles.

  • A.

    slices

  • B.

    bars

  • C.

    pieces

  • D.

    strands

Chưa có lời giải

Câu 44 (0.2đ)

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks.

Culture has a strong influence on non–verbal communication. Even the simple act of looking someone in the eye is not at all that simple. In the USA, Americans are (5) ______ to look directly at people when speaking to them. It shows interest in what they are saying and is thought to carry a (6) ______ of honesty. Meanwhile, in Japan and Korea, people avoid long periods of eye contact. It is considered more polite to look to the side during a conversation. The Lebanese, (7) ______, stand close together and look intensely into each other's eyes. The action shows sincerity and gives people a better sense of what their counterparts want. Given such differences with even the most common expressions, people (8) ______ travel or work abroad have a real need to learn the other culture's body language. People tend to be unaware of the messages they are sending to others. So, it is (9) ______ to consider your own body language before dealing with people from other cultures. Knowing about the body language of friends, clients, and colleagues can be very helpful in improving understanding and avoiding miscommunication.

Điền vào ô số 5

  • A.

    encouraged

  • B.

    assisted

  • C.

    forbidden

  • D.

    opposed

Chưa có lời giải

Câu 45 (0.2đ)

_______ for a second interview will be informed by mail.

  • A.

    Who chosen

  • B.

    All chosen

  • C.

    If you are chosen

  • D.

    Those are chosen

Chưa có lời giải

Câu 46 (0.2đ)

Read the passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions. 

Dark matter in the universe is believed by some scientists to be a substance that is not readily observable because it does not directly refract light or energy. Its existence can only be deduced because of the effect that it has on surrounding matter. In fact, some members of the scientific community have argued that dark matter does not actually exist. Others, however, believe in its existence, in part because the scientific community does not have a complete understanding of gravita science. On the other hand, some would argue that it is the understanding of gravitational science that leads most scientists to believe in the existence of dark matter, because without dark matter, there are many cosmological phenomena that are difficult to explain. 

For example, dark matter in the universe may have a peculiar effect on the Milky Way galaxy. Some scientists believe that the interaction between dark matter and other smaller, nearby galaxies is causing the Milky Way galaxy to take on a warped profile. It has been asserted that not only does dark matter exist, it may also be responsible for the Milky Way’s unusual shape. The interaction referenced involves two smaller galaxies near the Milky Way, called Magellanic clouds, moving through an enormous amount of dark matter, which, in effect, enhances the gravitational pull that the two Magellanic clouds could have on the Milky Way and other surrounding bodies. Without the existence of the dark matter, the Magellanic clouds would not have sufficient mass to have such a strong effect on the bend of the Milky Way galaxy. 

The strongest evidence for the validity of this hypothesis rests in Newtonian physics, and the hypothesis that anything with mass will exert a gravitational pull. The Milky Way and other galaxies with peculiar warped shapes are being molded by a gravitational force. However, there is nothing readily observable with sufficient mass that could cause such a high level of distortion via gravitational pull in the vicinity of the Milky Way. Therefore, something that is not easily observed must be exerting the necessary force to create the warped shape of the galaxy. 

Aaron Romanowsky and several colleagues have questioned the effect that dark matter might have on galaxies. They point to the existence of several elliptical galaxies surrounded by very little dark matter as evidence that dark matter is not, in fact, the cause of the warped galaxies. While they do not claim that their findings should be interpreted to conclude that dark matter does not exist, they apparently believe that the results of their studies cast doubt on some of the conventional theories of galaxy formation and manipulation. 

Several models constructed by researchers from the University of California at Berkeley, however, point to the idea that dark matter is the most likely explanation for the distorted shape of the Milky Way and other galaxies. Using computer models, they have mapped the likely interactions between certain galaxies and the surrounding dark matter, and those models have shown not only the possibility that dark matter is responsible for the warped shape of the Milky Way, but that the relationship between the dark matter and the Magellanic clouds is dynamic; the movement of the clouds through the dark matter seems to create a wake that enhances their gravitational influence on the Milky Way. 

As it is used in paragraph 1, the term phenomena most nearly means:

  • A.

    surprises.

  • B.

    problems.

  • C.

    occurrences.

  • D.

    attitudes.

Chưa có lời giải

Câu 47 (0.2đ)

Mark the letter A, B, C or D on your answer sheet to indicate the word(s) that is CLOSET in meaning to the underlined word(s) in each of the following questions.

Being a single mother no longer carries the social stigmathat is used to.

  • A.

    difficulty

  • B.

    holiness

  • C.

    stain

  • D.

    trial

Chưa có lời giải

Câu 48 (0.2đ)

Although David was _______ after a day’s work in the office, he tried to help his wife the household chores.

  • A.

    exhausting

  • B.

    exhausted

  • C.

    exhaust

  • D.

    exhaustive

Chưa có lời giải

Câu 49 (0.2đ)

Reading the following passage and mark the letter A, B, C or D on you answer sheet to indicate the correct word for each of the blanks.

The growth of cities, the construction of hundreds of new factories, and the spread of railroads in the United States before 1850 had increased the need for better illumination. But the lighting in American homes had improved very little over that of ancient times. Through the colonial period, homes were lit with tallow candles or with a lamp of the kind used in ancient Rome – a dish of fish oil or other animal or vegetable oil in which a twisted rag served as a wick. Some people used lard, but they had to heat charcoal underneath to keep it soft and burnable. The sperm whale provided superior burning oil, but this was expensive. In 1830 a new substance called “camphene” was patented, and it proved to be an excellent illuminant. But while camphene gave a bright light it too remained expensive, had an unpleasant odor, and also was dangerously explosive.

Between 1830 and 1850, it seemed that the only hope for cheaper illumination in the United States was the wider use of gas. In the 1840s, American gas manufacturers adopted improved British techniques for producing illuminating gas from coal. But the expense of piping gas to the consumer remained so high that until the mid–nineteenth century gas lighting was feasible only in urban areas, and only for public buildings for the wealthy. In 1854, a Canadian doctor, Abraham Gesner, patented a process for distilling a pitch like mineral found in New Brunswick and Nova Scotia that produced illuminating gas and an oil that he called “kerosene” (from “keros”, the Greek word for wax, and “ene” because it resembledcamphene). Kerosene, though cheaper than camphene, had an unpleasant odor, and Gesner never made his fortune from it. But Gesner had aroused a new hope for making illuminating oil from a product coming out of North American mines.

The word “this” in paragraph 1 refers to _______.

  • A.

    oil 

  • B.

    charcoal

  • C.

    lard

  • D.

    wick

Chưa có lời giải

Câu 50 (0.2đ)

Read the passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.

Dark matter in the universe is believed by some scientists to be a substance that is not readily observable because it does not directly refract light or energy. Its existence can only be deduced because of the effect that it has on surrounding matter. In fact, some members of the scientific community have argued that dark matter does not actually exist. Others, however, believe in its existence, in part because the scientific community does not have a complete understanding of gravita science. On the other hand, some would argue that it is the understanding of gravitational science that leads most scientists to believe in the existence of dark matter, because without dark matter, there are many cosmological phenomena that are difficult to explain. 

For example, dark matter in the universe may have a peculiar effect on the Milky Way galaxy. Some scientists believe that the interaction between dark matter and other smaller, nearby galaxies is causing the Milky Way galaxy to take on a warped profile. It has been asserted that not only does dark matter exist, it may also be responsible for the Milky Way’s unusual shape. The interaction referenced involves two smaller galaxies near the Milky Way, called Magellanic clouds, moving through an enormous amount of dark matter, which, in effect, enhances the gravitational pull that the two Magellanic clouds could have on the Milky Way and other surrounding bodies. Without the existence of the dark matter, the Magellanic clouds would not have sufficient mass to have such a strong effect on the bend of the Milky Way galaxy. 

The strongest evidence for the validity of this hypothesis rests in Newtonian physics, and the hypothesis that anything with mass will exert a gravitational pull. The Milky Way and other galaxies with peculiar warped shapes are being molded by a gravitational force. However, there is nothing readily observable with sufficient mass that could cause such a high level of distortion via gravitational pull in the vicinity of the Milky Way. Therefore, something that is not easily observed must be exerting the necessary force to create the warped shape of the galaxy. 

Aaron Romanowsky and several colleagues have questioned the effect that dark matter might have on galaxies. They point to the existence of several elliptical galaxies surrounded by very little dark matter as evidence that dark matter is not, in fact, the cause of the warped galaxies. While they do not claim that their findings should be interpreted to conclude that dark matter does not exist, they apparently believe that the results of their studies cast doubt on some of the conventional theories of galaxy formation and manipulation. 

Several models constructed by researchers from the University of California at Berkeley, however, point to the idea that dark matter is the most likely explanation for the distorted shape of the Milky Way and other galaxies. Using computer models, they have mapped the likely interactions between certain galaxies and the surrounding dark matter, and those models have shown not only the possibility that dark matter is responsible for the warped shape of the Milky Way, but that the relationship between the dark matter and the Magellanic clouds is dynamic; the movement of the clouds through the dark matter seems to create a wake that enhances their gravitational influence on the Milky Way. 

The last paragraph supports the general hypothesis provided earlier in the passage that:

  • A.

    computer models are necessary for an understanding of gravitational science.

  • B.

    dark matter has little to no effect on the formation of certain cosmological phenomena.

  • C.

    the effect of Magellanic clouds on galaxies is enhanced by dark matter.

  • D.

    the shape of the Milky Way galaxy can be deduced by observing the matter surrounding it.

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