问题 单项选择题

对闭经的分析,下列哪种表述是错误的

A.雌、孕激素序贯试验阴性,病因可能在子宫

B.孕激素试验阳性,提示卵巢能分泌一定水平的雌激素

C.GnRH刺激试验阳性,说明垂体功能正常

D.血泌乳素异常升高,说明闭经原因为垂体功能正常

E.基础体温双相,提示闭经原因可能在子宫

答案

参考答案:D

解析:血泌乳素由垂体分泌,异常升高导致闭经,系垂体功能异常导致。

阅读理解

阅读理解。

     Many children use the Internet to get useful knowledge and information, and to relax in their free time.

But some of them are not using it is a good way. Here are some rules to make sure you are safe and have

fun on the Internet.

     Make rules for Internet use with your parents. For example, when you can go online, for how long and

what activities you can go online.

     Don't give your password (密码) to anyone else, and never give out the following information-your real

name, home address, age, school, phone number or other personal information.

     Check with your parents before giving out a credit card (信用卡) number.

     Never send a photo of yourself to someone by e-mail unless your parents say it's OK.

     Check with your parents before going into a chat room. Different chat rooms have different rules and

attract different kinds of people. You and your parents ought to make sure it's a right place for you.

     Never agree to meet someone you met on the Internet without your parents' permission (允许). Never

meet anyone you met online alone.

     Always remember that people online may not be who they say they are. Treat everyone online as strangers.

     If something you see or read online makes you uncomfortable, leave the site. Tell a parent or teacher right

away.

     Treat other people as you'd like to be treated. Never use bad language.

     Remember-not everything you read on the Internet is true.

1. It's good for children to ______ on the Internet.

A. give password to others

B. get useful knowledge and information

C. give out a credit card number

2. The writer tells children to ______.

A. send their photos to him

B. make rules for Internet use with parents

C. believe everything they read on the Internet

3. According to the passage, if your parents don't agree, never ______.

A. read anything on the Internet

B. relax in your free time

C. have a face-to-face meeting with anyone you met online

4. What should NOT be done when you are on line?

A. Using bad language.

B. Leaving the site if you feel uncomfortable.

C. Treating everyone online as strangers.

5. The main idea of this passage is about ______.

A. how to use computers

B. information on the Internet

C. Internet safety rules

单项选择题