已知幂函数f（x）=k•x^a的图象过点（3， $\sqrt{3}$ ），则k+a=____．

根据短文内容，选择正确的答案。   

B

    In your life, there are a lot of people around you. They are your relatives, neighbors, friends or classmates. Sometimes you get along well with them, but sometimes don't. What can you do when someone hurts you? Most people may be angry or even fight with him. But it's not a good idea. You'd better forget all this and forgive (宽恕) him.

    Maybe it's not easy for you to do that, but it's possible. Please remember: Keep a good mood, and you will keep healthy. Staying angry with others, in fact, means letting others' mistakes treat yourself unfairly.

    How can you forgive others?

    First, think of something pleasant and try to get yourself happy.

    Second, don't wait others to say sorry to you. If anyone hurts you, he won't say sorry to you. He may just want to hurt you or just don't see things the same way.

    Third, try to see things in others' shoes. You can understand their minds better and make yourself a little happier.

    At last, try to know yourself very well. Whose mistakes caused that, yours or others'? If it's your fault (错误), try to say sorry to them. If it isn't, smile at the thing.

设有直线和平面、.下列四个命题中，正确的是(     )

小培和小亮同住一间宿舍，一次小亮有困难，小培帮他解决了困难，在生活的过程中，发现志趣相投，便成为了好朋友。一天，小培的100元钱不见了。他怀疑被小亮“偷拿”了。为此，小培有意无意地在小亮面前说风凉话。小亮听了很不是滋味。他本想与小培辩白一番。但反过来一想，小培家境不宽裕，丢了生活费难免着急上火。想到这儿，小亮不生气了。过了几天，小培在笔记本中找到了那100元钱。他顿时羞愧难当，赶忙向小亮道歉。小亮很大度，不仅没有计较，反而向小培祝贺：“找到了就好，我真为你高兴！”

下列各句中，加点的成语使用不恰当的一句是（3分）                （　　）