变异为生物进化提供了原始材料。[ ]

阅读理解。

     Microblog is a kind of multimedia blog (多媒体博客) that allows users to send messages, articles,

 photos and videos on the Internet. The information can be read by anyone or by someone that is chosen

  by the user.

     Microblog is different from a traditional blog. It is smaller in size. Like any other Internet tool,

 Microblog can be used for a number of purposes (目的).

     Microblog is a tool for communicating with your friends. We can make what happened to us known

  to our friends, anywhere and at any time, for example, "I watched the film Confucius today. It is really

  nice. "Then your friends can have a short discussion on your topic. They can also post similar events in

  their lives to share with you.

     Microblog can also offer you the chance to get closer to movie stars or sport stars. Stars can write

 what they see, hear, or think through Microblog. Fans can learn more about their favourite stars' daily

 activities immediately.

     Students can also use Microblog as a social service to see what their classmates are doing. Everyone

  finds it useful, not only students. For example, when preparing for performances, organizers can use

 Microblog to contact performers and quickly.

1. People can't send _____ online by Microblog according to the first paragraph.

    A. videos

    B. photos

    C. articles

    D. emails

2. Which of the following about Microblog is TRUE?

    A. It is smaller than a traditional blog.

    B. Only your friends can see the information on your Microblog.

    C. Every star has their own Microblog.

    D. Microblog is popular with everyone.

3. What dose the underlined word"contact"mean in Chinese?

    A. 表扬

    B. 联系

    C. 招聘

    D. 排练

4. Which of the following is the writer's opinion on Microblog?

    A. It is harmful to children.

    B. It has many advantages.

    C. Using it is very expensive.

    D. People only use it for fun.

5. What is the passage mainly about?

    A. An introduction to Microblog.

    B. How to use Microblog.

    C. The bad effects of Microblog.

    D. Who likes to use Microblog.

武昌起义后，帝国主义在“严守中立”的伪装下策划“南北议和”，表明

A．帝国主义在积蓄力量，准备 * * 革命

B．革命形势迅猛发展，帝国主义无所适从

C．帝国主义对革命派存有希望

D．帝国主义由支持清政府转为扶植袁世凯

功能失调性子宫出血最常见的类型是（）

A.无排卵性功血

B.排卵性功血

C.排卵期出血

D.黄体功能不全

E.子宫内膜不规则脱落

具有消导化积、清热祛湿功用的方剂是

A．舟车丸
B．保和丸
C．枳实消痞丸
D．木香槟榔丸
E．枳实导滞丸

根据开发区不同发展阶段，分析确定近、中、远期区域主要污染源。鉴于规划实施的时间跨度较长并存在一定的不确定性因素，污染源分析预测以( )为主。

A．远期

B．中期

C．近期和中期

D．近期