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Which of the following statements is TRUE according to the passage? [originaltex
Which of the following statements is TRUE according to the passage? [originaltex
游客
2024-10-29
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问题
Which of the following statements is TRUE according to the passage?
Under proper conditions, sound waves will be reflected from a hillside or other such obstruction. Sound travels at the speed of about one-fifth of a mile per second. If the hill is eleven hundred feet away, it takes two seconds for the sound to travel to the hill and back. Thus by measuring the time between a sound and its reflection-the echo, you can calculate the distance to an obstruction.
During World War II the British made a practical use of this rule to discover planes on their way to bomb London long before the enemy was near the object. They used radio waves instead of sound waves, since radio waves can pass through fog and clouds. The outnumbered Royal Air Force (RAF) always seemed to puzzle Germans that they were lying in wait at the right time and were never surprised. It was radio echoes more than anything else that helped them win the war.
Since the radio waves were used to tell the direction in which to send the RAF planes and the distance to send them, the device was called radio directing and ranging, and from the first letters the word radar was formed.
选项
A、People are concerned about appearance in old age.
B、People are reluctant to follow the trends in fashion.
C、People are far from neglecting what is in fashion.
D、People tend to ignore appearance in informal situations.
答案
C
解析
本题测试对细节内容的推测理解能力。从文中的关键信息“few are brave enough to ignore the trends of fashion”(没有多少人会勇敢到置潮流于不顾),可以推测人们不会漠视流行,正确答案为C。
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