风机机组的试运行的连续运转时间银给不少于（）小时。A、1B、2C、3D、4

阅读理解。

    "If I had one million yuan, I would buy you a big house! Do I have one million yuan? No, I don't! So I

only can spend ten fen on this short message, sending you my best wishes!"

    Today, SMS-Short Message Service is popular, and China Mobile (中国移动) says that every second,

there are 410 messages being sent.

    Look around you! People are watching their mobiles, smiling or laughing. Thumbs (拇指) are moving

quickly on mobiles, bringing happiness to their friends. Through SMS, we know the weather report, share

jokes and news, show love and friendship.

    SMS is becoming more and more popular. It says that 67% of young people like to send short messages

to greet each other. Internet SMS will be more helpful to people. I am thankful because SMS saves me

much money. Just on the top end of a thumb, you can find so much joy!

1. SMS can help people do the following except ______.[ ]

A. knowing the weather report

B. sharing jokes and news

C. showing love and friendship

D. spending more time travelling

2. The writer thinks that ______. [ ]

A. SMS helps people a lot

B. young people dislikes SMS

C. he makes SMS more popular

D. he will buy a house for his friend

3. The passage is mainly about ______. [ ]

A. how to search Internet

B. the joy of SMS

C. how to send short messages

D. ways of saving money

关于“索引条目”描述正确的是（）

A、索引项目由主题、参考和选择三个部分组成

B、索引项目的类别有“页面参考”和“对照参考”两种

C、索引主要的作用是帮助读者能够迅速的在书中找到所需要的资料

D、“索引条目”对话框中的“页面范围”是指定主题说明文字的

小明在做实验时，制作了四张玻片，其中属于切片的是（　　）

A．撕去辣椒的外表皮制成玻片标本

B．切取菠菜叶制成玻片标本

C．挑取苹果肉制成玻片标本

D．将某动物的血液制成玻片标本

人工被动免疫是通过注射下列哪些物质而获得（）

A.抗毒素

B.胎盘球蛋白

C.丙种球蛋白

D.特异性免疫球蛋白

E.灭活疫苗

在计算机输出的声音中，不属于合成声音的是（）。

A．频率调制声音

B．波表声音

C．波形声音

D．MIDI音乐