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问题 填空题

设x，y满足x2+y2=2，则x+2y的最小值是 ______．

答案

∵x2+y2=2

∴x=

2
cosα，y=
2
sinα

则x+2y=

2
cosα+2
2
sinα=
10
sin(α+θ)

∴x+2y的最小值是-

10

故答案为：-

10

填空题

Here is my idea about how a friend is like. Firstly, 61.______a friend is someone you can share your secrets. If you 62.______tell him a secret, never will he talks about it with anybody 63.______else. Besides, a friend is always good listener when you 64.______need one. After hear your sad stories, he will say some 65.______words that is nice and warm. Still, your happiness makes 66.______him happily, too. What’s more, a good friend is willing to 67.______offer the help to which you need, or can at least give you 68.______some advices. In a word, friends are those you like and 69.______trust, and you will enjoy every minute that you spent with 70.______them.

65().
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选择题

温 * * * * 在2010年的政府工作报告中指出，创造条件让人民批评政府、监督政府，让权力在阳光下运行。这意味着[ ]

①政府的一切行为都要对人民负责  ②政府的一切权力都是人民赋予的  ③政府要把人民利益与谋求自身利益相统一  ④公民对任何国家工作人员都有批评的权利

A．①②③

B．①②④

C．②③④

D．①②③④
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