由水谷精气的精华部分所化生的气是（） A．胃气 B．宗气 C．卫气 D．元气 E．营

阅读理解。

     "Who needs a shopping mall (购物中心) if you have Taobao?" says Wang Lin, 28, a writer in Beijing.

     Taobao, China's largest online shopping site (网上购物网站), has become an important part of Wang

Lin's life. She spends lots of money on Taobao.

      A growing number of Chinese Internet users like Wang  have found the joys of online shopping. Most

online shoppers are students or young workers. More women shop on line than men. Clothing and home-use

products (产品) are the most popular on line.

     It was reported that more than 250 billion (十亿) yuan was spent on online shopping last year, 80%

through Taobao.

     Taobao means "looking for treasure" in Chinese. People can find almost everything they need on Taobao,

from clothes to books, from candies to DVD players.

     You may question the security of online shopping, Wang Lin said, "It's very safe and convenient

( 便利的). Unless you receive the products from the sellers and are satisfied with them, the shop owner

will not get the money. You can also get your money back if you want to return the products."

1. What are the most popular on line? [ ]

A. Candles and DVD players.

B. Clothes and books.

C. Clothing and home-use products.

2. Taobao is ______. [ ]

A. a shopping mall

B. an online shopper

C. an online shopping site

3. Most online shoppers are ______. [ ]

A. young

B. old

C. babies

4. What does the underlined word "security" mean? [ ]

A. 质量

B. 安全

C. 信誉 

5. Which is the best title (标题) of the passage? [ ]

A. Wang Lin's life.

B. Online shopping in China.

C. Shopping on line is not safe.

肝硬化血小板减少的主要原因是（）

A.白蛋白合成不足

B.门静脉压力增高

C.血氨产生过多

D.腹泻

E.脾大

以上哪个选项是用来筛选题目，且其系数越大表示项目的区分度越小（） |使用专家判定法和经验法来进行衡量的是（） |使用鉴别指数法用来衡量的是（）

A.信度

B.效度

C.项目难度

D.项目区分度

E.信度和效度

国内生产总值

一位美国历史学家这样总结道：在欧洲的海外扩张中最重要的人物不是哥伦布、达•伽马、麦哲伦，而是那些拥有资本的企业家们。对这一点最恰当的解释是（）

A.否认了航海家们的贡献

B.企业家为航海活动提供了必需的物质支持

C.突出了企业家们的作用

D.资本的发展和需求是海外扩张的根本原因