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问题 单项选择题

（）是指由整体政治、经济、社会等环境因素对证券价格所造成的影响。

A.系统性风险

B.非系统性风险

C.主动操作风险

D.可分散风险

答案

参考答案：A

解析：系统性风险即市场风险，是指由整体政治、经济、社会等环境因素对证券价格所造成的影响。系统性风险包括政策风险、经济周期性波动风险、利率风险等。

阅读理解

Never try to work when you are very hungry. If you want to do your homework right after school, you may want to eat something before getting to work. ①Always do your homework before you get too tired. Don’t wait until very late in the evening, or your homework will seem much harder than it really is.

If you have more than an hour’s work，you should give yourself a break after an hour. On the other hand，② you should work at least half an hour a time without stopping.

Don’t put it off（推迟）until the last minute. If you put off doing your homework，you will have it on your mind，and you won’t enjoy your free time so much. If you put it off until the end of the week or until night before a test，you will have too much catching up to do. A little each night, enough to keep up with（跟上）what is happening each day in school，will take the fear out of tests and keep you on top of it.

Do your homework at the same time every day. This will help you make it a habit. It will make part of your daily work easier to do，and it will make your free time more enjoyable as well.

小题1:改写①句使句意不变。

_________ you get too tired, you should _______  doing your homework.

小题2:What will happen if you put off your homework until the last minute?

___________________________________

小题3:请将短文中的②句翻译成中文。

___________________________________
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解答题

将一个活动的长方形框拉成一个平行四边形．此时，平行四边形的面积比原来长方形的面积小一些．______．
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