問題詳情

VI. Reading Comprehension: 5%      Stereo sets with headphones started appearing in 1979. The headphones were on the ears of walkers, joggers, bicycle riders,and drivers. By the end of 1982, more than 10 million people around the world owned the tiny machines.    The owner of Sony, a Japanese company, invented the sets. He wanted to be able to listen to hi-fi music while playing tennis.Many companies now produce various models. Some sets play cassette tapes; others play AM or FM radio. A few even combine allthree. The lightweight sets allow people to listen to their favorite music at its loudest, without bothering anyone else.    As the sets grew more popular, some people began to worry about their use. One worry is about the dangers of an accidenton the street. A person wearing headphone cannot always hear the horn of a car or a warning shout. That fact has led some statesto take action. By the end of 1982, nine states had passed laws that banned the use of headphones by drivers. Some towns and citiesalso wanted to keep pedestrians and bicycle riders from using headphones in the street.     Another worry is that the headphone set could damage a listener’s hearing. Scientists in Japan studied the hearing of 150high school students who used headphones regularly. They found that eight student had a hearing loss. These eight students listenedto their stereo headphones an average of six hours a day. But when they stopped using the headphones, their hearing returned tonormal
71. ( ) The main reason that 10 million people bought the headphones is probably that the sets ____.
(A) are not expensive
(B) can be used almost anywhere
(C) keep out noises
(D) play cassette tapes

參考答案

答案：B
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)

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