题干

如图所示,将扑克牌盖在玻璃杯上,再把l元的硬币放在牌上,用手指迅速将扑克牌水平弹出,硬币会怎样?请你用学过的物理知识解这一现象.

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答:硬币落入杯中.因为硬币原来是和扑克牌一起静止的,当扑克牌迅速被弹出时,硬币由于惯性,要保持原来的静止状态,仍然留在原处,在重力的作用下,硬币就落入杯中了

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根据短文内容及首字母提示,补全空格内单词,使短文完整、通顺。

    Young people are the future masters of the country. Being a youth is one thing, and being a good one is a____. Everyone tries to be good, but not everybody has the right idea about it. Age will test youth, and youth will create age. Because we'll have heavy responsibilities(责任) upon our shoulders in future. We must educate o____ to be good. What are the qualifications(素质) for a good young person?

    A good youth should have these qualities. First of all, health, a healthy body is the best riches.W____ it, nothing can be done well. If you are poor in health, you'll have to take m____ day after day. Even you can't work, do sports and so on. Secondly, one must be of good quality. Always do something for others. Help those in trouble and care about the people around you. If everyone did the same, what a w____ world this would be! Thirdly, one must have the ability to work with others. Cooperation(合作)and communication are two important keys to better human relations. Everyone needs friends b____ no one can live through his life alone or do everything he wants to.Besides the examples above, patriotism(爱国主义)is the one we should never forget. Patriotism m____ a love of one's country. It is one of the h____ qualities of humans. Everyone should love his o____ country.

    I think a good youth of today should also have some training in art. If everyone can enjoy art and be able to make more of it for others, then people will live better and e____ more.