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问题 填空题

氨气（NH3）是一种无色、有刺激性气味的气体，密度比空气小，极易溶于水．加热氯化铵（NH4Cl）和熟石灰两种固体的混合物可制取氨气，同时生成氯化钙和水．回答下列问题：

（1）实验室制取氨气的化学方程式为：　                           　；最好选用下图　      　（选填装置A、B、C、D）气体发生装置制取氨气

（2）欲制得氨气（氨气溶于水），且能避免倒吸，最好在其发生装置后连接下图　  　装置．（选填E或F）．

答案

（1）2NH4Cl+Ca（OH）2CaCl2+2NH3↑+2H2O      C      （2）F

题目分析：（1）加热氯化铵（NH4Cl）和熟石灰两种固体的混合物可制取氨气，同时生成氯化钙和水，反应的方程式为：

2NH4Cl+Ca（OH）2CaCl2+2NH3↑+2H2O；发生装置的特点属于固体加热型的C装置；

（2）氨气极易溶于水，所以可用水吸收多余的氨气，为增大吸收面积，防止倒吸，选用F装置吸收．

点评：本题考查了气体的制取装置、收集方法等的选择，并在此基础上进行拓展，关键是利用题目提供的信息依据发生装置、收集方法选择的依据进行解析．

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Some people think only school children do not agree with their parents. However，it is not true. Communication（交流）is a problem for parents and children of all ages. If it's hard for you to communicate with your parents，don't worry about it. Here is some advice about getting on well with parents.

Don't argue（争辩）with your parents. Don't talk with your parents when you are angry. Your parents probably won't think over your ideas if you are shouting at them. And you can't express yourself well if you are angry. Go some place to cool off and think about what you want to say to your parents.

Try to reach an agreement. Perhaps you and your parents disagree on something. You can keep your disagreement and try your best to accept each other. Sometimes your parents might refuse to accept your reasons for something. In these situations, it is especially important to show love and respect to them. Showing respect will keep your relationship strong.

Talk about your values （价值观）. The values of your parents are probably different from yours. Tell your parents what you care about, and why. Understanding your values might help them see your purposes in life.

A good relationship with your parents can make you a better and happier person. It is worth having a try!

小题1:Is communication a problem only for parents and school children?

小题2:How many pieces of advice does the writer give you?

小题3:What should you do when your parents refuse to accept your reasons?

小题4:Why do you need to talk about your values with your parents?

小题5:What is the passage mainly about?

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单项选择题

电控顺序喷射系统的汽油压力通常为（）MPa。

A.0.4～0.6

B.0.2～0.3

C.0.02～0.03

D.0.06～0.09
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