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问题 单项选择题

幽默和笑话能刺激大脑产生对人体有益的物质，因此，笑对人的身心健康有着重要的影响。在人的身体里，笑是一种机制。它不但能引起愉悦的感觉，也能唤起人们建立友情，甚至是长久爱情关系的欲望。在战胜紧张和压力方面，笑也是一种不可或缺的缓解机制。
这段文字谈论的重点是______。

A．幽默和笑话能刺激大脑产生对人体有益的物质
B．笑能引起愉悦的感觉
C．笑是一种缓解机制
D．笑对健康有益

答案

参考答案：D

解析：这段话的中心句是“笑对人的身心健康有着重要的影响”，也是文段的主要观点。根据文段意思，这种影响是有益的，ABC项都不是文段的主要观点。故选D。

解答题
在△ABC中，设∠A，∠B，∠C的对边分别为a，b，c，已知3cosA-2sin2A=0，
（1）求∠A的大小；
（2）若a=
3
，b+c=3(b＞c)，求b，c的值．
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单项选择题

A good modern newspaper is an extraordinary piece of reading. It is remarkable first for what it contains the range of news from local crime to international politics, from sports to business to fashion to science, and the range of comment and special features (特定) as well, from editorial page to feature articles and interviews to criticism of books, art, theatre and music. A newspaper is even more remarkable for the way one reads it never completely, never straight through, but always by jumping from here to there, in and out glancing at one piece, reading another article all the way through, reading just a few paragraphs of the next.
A good modern newspaper offers a variety to attract many different readers, but far more than any one reader is interested in. What brings this variety together in one place is its topicality (时事性), its immediate relation to what is happening in your world and your locality now. But immediacy and the speed of production that goes with it mean also that much of what appears in a newspaper has no more than transient (短暂的) value.
For all these reasons, no two people really read the same paper: what each person does is to put together out of the pages of that day’s paper, his own selection and sequence, his own news paper. For all these reasons, reading newspapers efficiently, which means getting what you want from them without missing things you need but without wasting time, demands skill and self-awareness as you modify and apply the techniques of reading.

According to the passage, the reason why no two people really read the same newspaper is that ______.

A. people scan for the news they are interested in
B. different people prefer different newspapers
C. people are rarely interested in the same kind of news
D. people have different views about what a good newspaper is
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