Câu hỏi: 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 30 to 34
Scientists estimate that about 35,000 other objects, too small to detect with radar but detectable with powerful Earth-based telescopes, are also circling the Earth at an altitude of 200 to 700 miles. This debris poses little danger to us on the Earth, but since it is traveling at average relative speeds of six miles per second, it can severely damage expensive equipment in a collision. This threat was dramatized by a cavity one-eighth of an inch in diameter created in a window of a United States space shuttle in 1983. The pit was determined to have been caused by a collision with a speck of paint traveling at a speed of about two to four miles per second. The window had to be replaced.
As more and more nations put satellites into space, the risk of collision can only increase. Measures are already being taken to control the growth of orbital debris. The United States has always required its astronauts to bag their wastes and return them to Earth. The United States Air Force has agreed to conduct low-altitude rather than high-altitude tests of objects it puts into space so debris from tests will reenter the Earth's atmosphere and burn up. Extra shielding will also reduce the risk of damage. For example, 2,000 pounds of additional shielding is being considered for each of six space-station crew modules. Further, the European Space Agency, an international consortium is also looking into preventive measures.
It can be inferred from the passage that debris was harmful to one of the space shuttles because the debris was _________
A. large
B. moving very fast
C. radioactive
D. burning uncontrollably
Scientists estimate that about 35,000 other objects, too small to detect with radar but detectable with powerful Earth-based telescopes, are also circling the Earth at an altitude of 200 to 700 miles. This debris poses little danger to us on the Earth, but since it is traveling at average relative speeds of six miles per second, it can severely damage expensive equipment in a collision. This threat was dramatized by a cavity one-eighth of an inch in diameter created in a window of a United States space shuttle in 1983. The pit was determined to have been caused by a collision with a speck of paint traveling at a speed of about two to four miles per second. The window had to be replaced.
As more and more nations put satellites into space, the risk of collision can only increase. Measures are already being taken to control the growth of orbital debris. The United States has always required its astronauts to bag their wastes and return them to Earth. The United States Air Force has agreed to conduct low-altitude rather than high-altitude tests of objects it puts into space so debris from tests will reenter the Earth's atmosphere and burn up. Extra shielding will also reduce the risk of damage. For example, 2,000 pounds of additional shielding is being considered for each of six space-station crew modules. Further, the European Space Agency, an international consortium is also looking into preventive measures.
It can be inferred from the passage that debris was harmful to one of the space shuttles because the debris was _________
A. large
B. moving very fast
C. radioactive
D. burning uncontrollably
Kỹ năng: Đọc
Giải thích:
"Từ đoạn văn có thể suy ra rằng mảnh vỡ gây tổn gại đến một trong những tàu con thoi vì mảnh vỡ_____
A. Lớn
B. Di chuyển rất nhanh
C. Có phóng xạ
D. Cháy không thể kiểm soát
Dẫn chứng: " This debris poses little danger to us on the Earth, but since it is traveling at average relative speeds of six miles per second, it can severely damage expensive equipment in a collision." Dù mảnh gỡ không gây đe dọa đến trái đất, nhưng vì nó di chuyển với tốc độ trung bình là 6 dặm một giây, nó có thể gây tổn hại nghiêm trọng đến những thiết bị đắt tiền trong vụ va chạm.
Giải thích:
"Từ đoạn văn có thể suy ra rằng mảnh vỡ gây tổn gại đến một trong những tàu con thoi vì mảnh vỡ_____
A. Lớn
B. Di chuyển rất nhanh
C. Có phóng xạ
D. Cháy không thể kiểm soát
Dẫn chứng: " This debris poses little danger to us on the Earth, but since it is traveling at average relative speeds of six miles per second, it can severely damage expensive equipment in a collision." Dù mảnh gỡ không gây đe dọa đến trái đất, nhưng vì nó di chuyển với tốc độ trung bình là 6 dặm một giây, nó có thể gây tổn hại nghiêm trọng đến những thiết bị đắt tiền trong vụ va chạm.
Đáp án B.