图中来源于毛茛科的是（） A. B. C. D. E.

阅读理解。

     I worked for a short time as a cashier (出纳员) at a restaurant a few months ago. I also helped to clean

up the tables when it was very busy. One night, just before Christmas, I found a large black wallet on the

floor near one of the tables. I guessed I should check it to find out who was the owner, but I was very busy

at the time. And I imagined that if there was something valuable in the wallet, the owner would be back. Sure

enough, an hour later a man came up to the counter and asked if anyone had found a wallet. I asked him to

describe the lost wallet, and after he described it exactly, I gave him the wallet. He expressed his thanks when

I handed it to him. He asked me if I had opened it, and when I told him "no", at once he opened it and showed

that it had nearly $800 in cash (现金). He took out a twenty-dollar bill and handed it to me and I was amazed

at this."A reward (酬劳) for your honesty, young girl." he said and then turned and walked away.

     Thinking about it later, I began wondering whether I would have been honest if I had known what was

in the wallet! I thought that if I had no way to find the owner and no one returned to get it, I might keep it.

But it also came into my mind that I actually saved someone's Christmas plans by finding and returning the

wallet. The good feeling it gave me was worth more than anything could buy.

1. What's in the lost wallet?

A. Nothing valuable.

B. A Christmas plan.　

C. About 800 dollars.

D. A twenty-dollar bill.　

2. The writer didn't give the wallet to the man until ______.

A. she got a reward

B. the man expressed his thanks

C. the man described the wallet exactly

D. she saw the man again in the restaurant

3. If the owner of the wallet couldn't be found, the writer might ______.

A. return it later

B. keep it herself

C. call the police

D. give it to her boss

4. How did the writer feel after returning the wallet? 

A. She felt very happy about it.

B. She wished that he hadn't done it.

C. She was disappointed about what the man did.

D. She was sad to lose the chance to keep the money.

有以下程序　　void f(int x,int y)　　{　int t;　　　if(x＜y){ t=x; x=y; y=t; }　　}　　main(　)　　{　int a=4,b=3,c=5;　　　f(a,b); f(a,c); f(b,c);　　　printf("%d,%d,%d\n",a,b,c);　　}　　执行后输出的结果是

A． 3,4,5

B． 5,3,4

C． 5,4,3

D． 4,3,5

2006年末，福建省全省常住人口为3558万人，其中，男性人口1797万人，女性人口1761万人。全年净增人口23万人，比上年增长0.65%，自2000年以来，人口总量持续保持低速增长的态势。

2001-2005年期间，福建总人口约增长了（）。

A．2.7%

B．32.5‰

C．120万

D．140万

图示结构的超静定次数为（）。

A．7

B．6

C．5

D．4

总曲折是（）。

A.从曲轴输出端法兰开始平轴，在艉轴首法兰处所测得的曲折值

B.从艉轴首法兰开始平轴，在曲轴输出端法兰处所测得的曲折值

C.A或B

D.以曲轴输出端法兰为基准测得的曲折值