2. 外语
  3. We have to be careful in driving a car mainly because it could be ______. According to the passage, air bags are another device

We have to be careful in driving a car mainly because it could be ______. According to the passage, air bags are another device

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问题 We have to be careful in driving a car mainly because it could be ______.
According to the passage, air bags are another device that ______.
选项 A、adds safety to car driving
B、is going to replace seat belts
C、comes out slowly to function
D、prevents cars from running too fast
答案A
解析 本题为细节题。由题干air bags定位到文章第四段的第二句话“Air bags are also very important for car safety”“气囊对汽车安全也非常重要”此句叙述与选项A一致。B、C、D项不是气囊的真正用途．因此，答案是A。
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