研究生命的起源可以通过科学推测进行．下列关于科学推测的叙述不正确的是（ ） A．

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       One day a rich boy bought a magic mirror (镜子). When he got home, he looked in the mirror. His

face looked sad. He tried to smile and make funny faces, his face looked still sad. Then he did many

happy things, but his face always looked sad.

       "Oh, what a terrible mirror! It doesn't work! " he said angrily.

       The next day on his way to buy some chocolate, he saw a little girl crying sadly. The rich boy went

up to her and asked what had happened. The little girl said she couldn't find her parents. "Don't worry.

I'll help you," the rich boy said. So they went to look for them together. Finally they found her parents.

They were so thankful for his help. After the rich boy arrived home, he looked in the mirror as usual. To

his surprise, his face looked very happy. The boy understood the magic of the mirror. The mirror could

show the true feelings of its owner. This was true-the rich boy had helped that little girl so he felt really

happy.

请根据短文内容，选择最佳答案。

1. One day a rich boy bought _______.  

A. a magic mirror    

B. a normal mirror  

C. a small mirror  

D. a magic book

2. The boy's face always looked _______ in the mirror on the first day.

A. happy

B. sad

C. terrible  

D. funny

3. On his way to buy some chocolate, the rich boy saw_______ crying sadly.

A. a little boy

B. a little girl

C. a little dog

D. a little cat

4. Finally the rich boy _______.

A. lost his parents

B. bought a new mirror

C. helped the little girl find her parents

D. bought a mirror for the little girl

5. From the story we know the boy was _______.

A. brave

B. foolish

C. clever

D. helpful

胃迷走神经干切断的并发症不包括（）

A.倾倒综合征

B.腹泻

C.吞咽困难

D.胃内容物滞留

E.胆囊结石

在物流系统中，提高物流系统效率的关键活动是（）。

A.装卸搬运

B.信息处理

C.流通加工

D.包装设计

西汉五朝掌管音乐的机构所采集的歌辞称作（）

A.汉赋

B.楚辞

C.乐府诗

D.国风

UNIX/Linux系统中的Apache服务器的主要安全缺陷表现在攻击者可以（）。

A、利用HTTP协议进行的拒绝服务攻击

B、发动缓冲区溢出攻击

C、获得root权限

D、利用MDAC组件存在一个漏洞，可以导致攻击者远程执行目标系统的命令