两个变量(x，y)，有n对观测值(xi，yi)，如果这n个点在直角坐标系中形成一条直

在下列各句的空白处填入一个最恰当的单词，使句子意思完整，语法正确。

1. He is very sad because he failed the exam yesterday.  Let's        _ him up.

2. Tim wants to find a new job.  Is there an           in today's newspaper?

3. Don't waste food anymore.  Nowadays many people die of           in the world.

4. I'm afraid we have        _ out of all the money already. You should think up some ideas to make some.

5. I love the dog very much because he makes my life           with pleasure.

6. He           the window to keep out the cold.

7. The computer has broken down.  I will have it       _ soon.

8. There is little time left.  Let's put _        making the plan till next Monday.

9. You can't           how surprised she was when she found her net pal was a ten-year-old boy.

10. To the           boy,  the world is quite silent,  but he still can feel the colorful life.

Talk about the pictures          your partner .[ ]

A. with  

B. in  

C. about

在大电流接地系统中，任何一点发生单相接地短路时，零序电流等于通过故障点电流的（）

A、1/3倍

B、1/2倍

C、√3/3倍

吸入口径相同的离心泵比转数大，流量（）.