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    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 (安全带) when you’re in a car. Why? Think about this example: You put an egg on a skateboard 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 1849.
    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 new cars have air bags in front of and next to the seats. When a car hits something, its air bags will come out quickly in less than one second to keep the people inside safe.
    小题1:The passage mainly tells us ______.
    A．two important ways to keep safe in cars
    B．how air bags work to make cars safe
    C．how seat belts work to make cars safe
    D．why we must tie the egg to the skateboard
    小题2: The writer gives the example of the egg to ______.
    A．tell us that eggs are easy to break
    B．show how to wear a seat belt
    C．show why it’s important to wear a seat belt in a car
    D．tell us what a skateboard is
    小题3: Seat belts can make us safer because ______.
    A．we are interested in them
    B．they can stop us from hitting other cars
    C．they can help us stay safely on the seats
    D．they are made of strong materials
    小题4: Air bags are important for cars because ______.
    A．they are made of plastic
    B．they can also help us to keep safe in a car
    C．they can keep cars running slowly
    D．they’re put in front of and next to the seats
    小题5: Which of the following is TRUE according to this passage?
    A．When a car hits something, its air bags will come out a few minutes later.
    B．It won’t be dangerous if there are seat belts or air bags in a car.
    C．Now most of new cars still have only one air bag.
    D．Volvo was the first to use seat belts.

    小题1:A
    小题2:C
    小题3:C
    小题4:B
    小题5:D

    试题分析：文章介绍了驾车和乘车时系安全带自我保护的原理，安全气囊是如何保护驾车人和乘车人安全的以及安全带的历史。
    小题1:通读文章可知，文章介绍了驾车和乘车时系安全带自我保护的原理以及安全气囊是如何保护驾车人和乘车人安全的。所以本题选A。
    小题2:通读文章第二、三段可知，通过将鸡蛋系在滑冰板上再碰石头，而鸡蛋不破的原理来告知人们乘车驾车系安全带的重要性。 所以本题选C。
    小题3:通过将鸡蛋系在滑冰板上碰石头而鸡蛋不破的原理可知，系安全带可以让人在座位上处于安全状态。所以本题选C。
    小题4: 由“When a car hits something its air bags will come out quickly in less than one second to keep the people inside safe。”可知，当发生相撞时安全气囊打开，同样起到保护安全的作用。所以本题选B。
    小题5:通读全文由“Volvo a famous Swedish carmaker was the first to use seat belts in 1849。”可知，沃尔沃是第一个用安全带的。所以本题选D。
    点评：完成本题需要首先读明白文章中试验的原理，方可理解安全带的重要性。本文有一定的难度，阅读本文时，应该尽量多读几遍，体会文章的意思；由于多部分问题不能在文中直接找到答案，所以应该找出相似的或者有关联的句型，加以比较，从而得出正确选项。
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