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  3. Cars are lots of fun, but they could also be dangerous. We have to be careful when we drive them or ride in them. It’s alway

Cars are lots of fun, but they could also be dangerous. We have to be careful when we drive them or ride in them. It’s alway

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问题     Cars are lots of fun, but they could also be dangerous. We have to be careful when we drive them or ride in them.
    It’s always a good idea to put on your seat belt when "you’re in a car. Why? Think about this example: You put an egg on a skateboard(滑板) and give it a push. If the skateboard hits a stone, it will stop, but the egg won’t. It will fly through the air, hit the ground and break.
    Now, think what would happen if you tied the egg to the skateboard. When the skateboard hits a stone, the egg won’t go flying. It will stay safely on the skateboard.
    Volvo, a famous Swedish carmaker, was the first to use seat belts in 1949. Air bags are also very important for car safety because sometimes a seat belt isn’t enough. If the car is going really fast and runs into something, seat belts could even hurt the people who wear them.
    Most newer cars have air bags in front of and next to the seats. When a car hits something, its airbags will come out quickly in less than one second—to keep the people inside safe.
The example of an egg on a skateboard is used to show that _______.
选项 A、eggs break easily on a moving skateboard
B、cars that are moving suddenly are dangerous
C、seat belts are important to safety
D、driving is a dangerous act
答案C
解析 推理判断题。文章第二、三段以滑板上的鸡蛋为例说明，如果不固定鸡蛋，滑板遇阻时会停下，而鸡蛋则会继续前行，掉到地上摔碎，但是如果将鸡蛋固定在滑板上，即使滑板遇阻，鸡蛋也不会前行，当然也就不会摔碎，保证了安全。对于车辆中的人来说，也是同样的道理，安全带可以将人固定，车辆发生碰撞，起到保护人身安全的作用，可见这就是安全带的重要作用，所以选项C正确。
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