2. 外语
  3. A、Americans are too attached to their cars. B、American cars are too fast. C、Automobiles threaten human health. D、Automobiles are

A、Americans are too attached to their cars. B、American cars are too fast. C、Automobiles threaten human health. D、Automobiles are

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问题  
Professors from Yale University agreed in a panel discussion tonight that the automobile was what one of them called "Public Health Enemy No. 1 in This Country". Besides polluting the air and overcrowding the cities, automobiles could cause heart disease "because we don’t walk anywhere any more," said Dr. H. P. Richard Weinerman, professor of medicine and public health. Dr. Weiner-man’s sharp accusation against the automobile came in a discussion of human environment on Yale Reports, a radio program broadcast by Station WTIC in Hartford, Connecticut. The program opened a three-part series on "Staying Alive". "For the first time in human history, the problem of man’s survival has to do with his control of man-made hazards," Dr. Weinerman said. "Before this, the problem had been the control of natural hazards."
16. What is the main idea of the passage?
17. Why could automobiles cause heart disease?
18. For the first time, what does the problem of man’s survival have to do with?
选项 A、Americans are too attached to their cars.
B、American cars are too fast.
C、Automobiles threaten human health.
D、Automobiles are the main pubic transportation tools of USA.
答案C
解析 短文开头即称汽车是“该国公共健康的头号敌人”，整篇文章即围绕此主题展开，故答案C。短文开头句通常是主题所在，听出automobile和health enemy No．1，即可准确答题。万一开头句漏听了，全文多处提到汽车对人的危害，disease，survival，hazards等词也可帮助确定短文主题。
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