Google's prototypes have covered over a million kilometers on the road. They have also had to deal with unexpected situations, such as a child driving a toy car in the road, and a woman in an electric wheelchair chasing a duck. In each case, the car reacted safely.
Some are not convinced. Sven Beiker of Stanford University thinks driverless cars will still need human input in extreme circumstances.
语篇解读:本文是一篇说明文。无人驾驶汽车尽管能够减少交通事故和交通堵塞,但是,它的安全性还有待验证。
8.According to Paragraph 1, what is the author's chief concern about driverless cars?
A.Functions.B.Safety.
C.Price.
D.Appearance.
解析:选B 细节理解题。根据第一段第三、四句“But would you feel ... in their driverless cars.”可知,作者主要关心的是无人驾驶汽车的安全问题。故选B。
9.Chris Urmson mentioned his 11yearold son in order to show that ________.
A.traditional cars are harmful for kids
B.his son is not good at driving
C.his son is a slow learner in driving
D.driverless cars will come soon
解析:选D 细节推断题。根据第二段倒数第二、三句“... hopes his 11yearold son will never have to take a ... be on the roads in five years.”可知,Chris Urmson希望他11岁的儿子将来不用参加驾照考试。为了实现这个愿望,无人驾驶汽车须在5年之内上市,即在他的儿子16岁之前。由此可知,Chris Urmson提到他儿子是为了说明无人驾驶汽车很快就能被生产出来。故选D。
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