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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

admin2011-03-07  51
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 are 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 as tone, 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 should not be stopped suddenly
C、seat belts are important to safety
D、driving is a dangerous act
答案C
解析 第二段第一句：“It’s always a good idea to put on your seat belt when you are in a car. ”
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