The most visible remind of the close relationship between the United States and France is the famous Statue of Liberty,...

A pilot cannot fly by sight alone. In many conditions, such as flying at night and landing in dense fog, a pilot must use radar, an alternative way of navigating. Since human eyes are not very good at determining speeds of approaching objects, radar can show a pilot how fast nearby planes are moving. The basic principle of radar is exemplified by what happens when one shouts in a cave. The echo of the sounds against the walls helps a person determine the size of the cave. With radar, however, the waves are radio waves instead of sound waves. Radio waves travel at the speed of light, about 300,000 kilometers in one second. A radar set sends out a short burst of radio waves. Then it receives the echoes produced when the waves bounce off objects. By determining the time it takes for the echoes to return to the radar set, a trained technician can determine the distance between the radar set and other objects. The word “radar”, in fact, gets its name from the term “radio detection and ranging”. “Ranging” is the term for detection of the distance between an object and the radar set. Besides being of critical importance to pilots, radar is essential for air traffic control, tracking ships at sea, and for tracking weather systems and storms.

51. What is the main topic of this passage?

A. The nature of radar. B. History of radar. C. Alternatives to radar. D. Types of ranging.

52. According to the passage, what can radar detect besides location of objects?

A. Shape B. Size C. Speed D. Weight

53. The word “exemplified” in the passage can be replaced by_________.

A. “specified” B. “resembled” C. “illustrated” D. “justified”

54. The word “shouts” in the passage most closely means_________.

A. “exclaims” B. “yells” C. “shoots D. “whispers”

55. Which of the following words best describes the tone of this passage?

A. argumentative B. explanatory C. humorous D. imaginative

56. According to the passage, the distance between a radar set and an object can be determined by_________.

A. the time it takes for a burst of radio waves to produce echoes when the waves bounce off the object

B. the term “ranging” used for detection of the distance between an object and the radar set

C. the time it takes for the radio waves to produce echoes and bounce off the object

D. the time it takes for the echoes produced by the radio waves to return to the radar set

57. Which type of waves does radar use?

A. tidal B. sound C. heat D. radio

58. The word “tracking” in the passage most closely means_________.

A. sending B. searching for C. ranging D. repairing

59. Which of the following would most likely be the topic of the next paragraph?

A. A history of flying. B. Other uses of radar. C. The technology used by pilots. D. Uses of some technology.

60. What might be inferred about radar?

A. It takes the place of a radio. B. It has improved navigational safety. C. It was developed from a study of sound waves. D. It gave birth to the invention of the airplane.

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#Yumi

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Lê Quỳnh Anh

24 tháng 4 2017

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 28 to 34.In 1972, a century after the first national park in the United States was established at Yellowstone, legislation was passed to create the National Marine Sanctuaries Program. The intent of this legislation was to provide protection to selected coastal habitats similar To that existing for land areas designated as national parks. The designation...

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Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 28 to 34.

In 1972, a century after the first national park in the United States was established at Yellowstone, legislation was passed to create the National Marine Sanctuaries Program. The intent of this legislation was to provide protection to selected coastal habitats similar To that existing for land areas designated as national parks. The designation of an areas a marine sanctuary indicates that it is a protected area, just as a national park is. People are permitted to visit and observe there, but living organisms and their environments may not be harmed or removed.

The National Marine Sanctuaries Program is administered by the National Oceanic and Atmospheric Administration, a branch of the United States Department of Commerce. Initially, 70 sites were proposed as candidates for sanctuary status. Two and a half decades later, only fifteen sanctuaries had been designated, with half of these established after 1978. They range in size from the very small (less than I square kilometer) Fagatele Bay National Marine Sanctuary in American Samoa to the Monterey Bay National Marine Sanctuary in California, extending over 15,744 square kilometers.

The National Marine Sanctuaries Program is a crucial part of new management practices in which whole communities of species, and not just individual species, are offered some degree of protection from habitat degradation and overexploitation. Only in this way can a reasonable degree of marine species diversity be maintained in a setting that also maintains the natural interrelationships that exist among these species.

Several other types of marine protected areas exist in the United States and other countries. The National Estuarine Research Reserve System, managed by the United States government, includes 23 designated and protected estuaries. Outside the United States, marine protected-area programs exist as marine parks, reserves, and preserves. Over 100 designated areas exist around the periphery of the Caribbean Sea. Others range from the well-known Australian Great Barrer Reef Marine Park to lesser-known parks in countries such as Thailand and Indonesia, where tourism is placing growing pressures on fragile coral reef systems. As state, national, and international agencies come to recognize the importance of conserving marine biodiversity, marine projected areas. whether as sanctuaries, parks, or estuarine reserves, will play an increasingly important role in preserving that diversity.

The passage mentions which of the following as a threat to marine areas outside the United States?

A. Limitations in financial support

B. The use of marine species as food

C. Variability of the climate

D. Increases in tourism

#Tiếng anh thí điểm lớp 12

1

DH

Dương Hoàn Anh

24 tháng 4 2017

Đáp án D

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Lê Quỳnh Anh

2 tháng 12 2019

Sugar tastes sweet because of thousands of receptors on the tongue which connect the substance with the brain. The taste of sweetness is universally accepted as the most pleasurable known, although it is a fructose. Abundant is the most common occurring sugar, (1)______ of which include fruit and honey. Sucrose, which supplies glucose to the body, is (2)______ from the sugar cane plant, and white sugar (pure sucrose) is used by food technologists to (3)______ sweetness in other substances....

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#Tiếng anh thí điểm lớp 12

1

DH

Dương Hoàn Anh

2 tháng 12 2019

Đáp án D

Giải thích: Đường trắng ( sucrose tinh khiết) được sử dụng bởi các kĩ sư công nghệ thực phẩm để đo độ ngọt trong các chất khác.

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Lê Quỳnh Anh

17 tháng 4 2018

Sugar tastes sweet because of thousands of receptors on the tongue which connect the substance with the brain. The taste of sweetness is universally accepted as the most pleasurable known, although it is a fructose. Abundant is the most common occurring sugar, (1)______ of which include fruit and honey. Sucrose, which supplies glucose to the body, is (2)______ from the sugar cane plant, and white sugar (pure sucrose) is used by food technologists to (3)______ sweetness in other substances....

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#Tiếng anh thí điểm lớp 12

1

DH

Dương Hoàn Anh

17 tháng 4 2018

Đáp án B

Giải thích: "to have yet + P.P": vẫn chưa làm được điều gì đó

Dịch: Vẫn chưa có ai phát minh ra cách dự đoán xem 1 chất nào đó có vị ngọt hay không.

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Lê Quỳnh Anh

21 tháng 8 2017

Sugar tastes sweet because of thousands of receptors on the tongue which connect the substance with the brain. The taste of sweetness is universally accepted as the most pleasurable known, although it is a fructose. Abundant is the most common occurring sugar, (1)______ of which include fruit and honey. Sucrose, which supplies glucose to the body, is (2)______ from the sugar cane plant, and white sugar (pure sucrose) is used by food technologists to (3)______ sweetness in other substances....

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#Tiếng anh thí điểm lớp 12

1

DH

Dương Hoàn Anh

21 tháng 8 2017

Đáp án B

Giải thích: draw: vẽ ra, lôi cuốn

extract from: chiết xuất từ

cite from: trích dẫn từ

make from: làm từ

Dịch: Đường mía, nguồn cung cấp cung cấp glucose cho cơ thể, được chiết xuất từ cây mía đường.

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Lê Quỳnh Anh

6 tháng 4 2017

Sugar tastes sweet because of thousands of receptors on the tongue which connect the substance with the brain. The taste of sweetness is universally accepted as the most pleasurable known, although it is a fructose. Abundant is the most common occurring sugar, (1)______ of which include fruit and honey. Sucrose, which supplies glucose to the body, is (2)______ from the sugar cane plant, and white sugar (pure sucrose) is used by food technologists to (3)______ sweetness in other substances....

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#Tiếng anh thí điểm lớp 12

1

DH

Dương Hoàn Anh

6 tháng 4 2017

Đáp án C

Giải thích: Nguồn nguyên liệu làm ra đường gồm có mật và trái cây, ta dùng "sources".

Các đáp án còn lại: "origin": nguồn gốc, "root": gốc rễ, "place": địa điểm.

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Lê Quỳnh Anh

10 tháng 3 2019

Sugar tastes sweet because of thousands of receptors on the tongue which connect the substance with the brain. The taste of sweetness is universally accepted as the most pleasurable known, although it is a fructose. Abundant is the most common occurring sugar, (1)______ of which include fruit and honey. Sucrose, which supplies glucose to the body, is (2)______ from the sugar cane plant, and white sugar (pure sucrose) is used by food technologists to (3)______ sweetness in other substances....

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#Tiếng anh thí điểm lớp 12

1

DH

Dương Hoàn Anh

10 tháng 3 2019

Đáp án A

Giải thích: maximum (lượng tối đa)

Dịch: Các nhà sản xuất thêm lượng lớn đường vào thực phẩm nhưng không bao giờ vượt quá mức tối đa cần thiết để tạo ra hương vị dễ chịu nhất.

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Lê Quỳnh Anh

10 tháng 7 2017

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 28 to 34.In 1972, a century after the first national park in the United States was established at Yellowstone, legislation was passed to create the National Marine Sanctuaries Program. The intent of this legislation was to provide protection to selected coastal habitats similar To that existing for land areas designated as national parks. The designation...

Đọc tiếp

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 28 to 34.

In 1972, a century after the first national park in the United States was established at Yellowstone, legislation was passed to create the National Marine Sanctuaries Program. The intent of this legislation was to provide protection to selected coastal habitats similar To that existing for land areas designated as national parks. The designation of an areas a marine sanctuary indicates that it is a protected area, just as a national park is. People are permitted to visit and observe there, but living organisms and their environments may not be harmed or removed.

The National Marine Sanctuaries Program is administered by the National Oceanic and Atmospheric Administration, a branch of the United States Department of Commerce. Initially, 70 sites were proposed as candidates for sanctuary status. Two and a half decades later, only fifteen sanctuaries had been designated, with half of these established after 1978. They range in size from the very small (less than I square kilometer) Fagatele Bay National Marine Sanctuary in American Samoa to the Monterey Bay National Marine Sanctuary in California, extending over 15,744 square kilometers.

The National Marine Sanctuaries Program is a crucial part of new management practices in which whole communities of species, and not just individual species, are offered some degree of protection from habitat degradation and overexploitation. Only in this way can a reasonable degree of marine species diversity be maintained in a setting that also maintains the natural interrelationships that exist among these species.

Several other types of marine protected areas exist in the United States and other countries. The National Estuarine Research Reserve System, managed by the United States government, includes 23 designated and protected estuaries. Outside the United States, marine protected-area programs exist as marine parks, reserves, and preserves. Over 100 designated areas exist around the periphery of the Caribbean Sea. Others range from the well-known Australian Great Barrer Reef Marine Park to lesser-known parks in countries such as Thailand and Indonesia, where tourism is placing growing pressures on fragile coral reef systems. As state, national, and international agencies come to recognize the importance of conserving marine biodiversity, marine projected areas. whether as sanctuaries, parks, or estuarine reserves, will play an increasingly important role in preserving that diversity.

The word “intent” in the first paragraph is closest in meaning to _______

A. repetition

B. approval

C. goal

D. revision

#Tiếng anh thí điểm lớp 12

1

DH

Dương Hoàn Anh

10 tháng 7 2017

Đáp án C

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