问题 单项选择题

肾上腺皮质显像的原理描述哪项正确()。

A.胆固醇是合成肾上腺皮质激素的原料

B.胆固醇摄取的数量和速度与皮质功能密切相关

C.将放射性核素标记的胆固醇及其衍生物静脉注射后,主要与肾上腺皮质细胞膜上的低密度脂蛋白受体结合

D.通过显像可以反映肾上腺皮质的功能

E.以上都对

答案

参考答案:E

解析:肾上腺皮质显像用于诊断肾上腺皮质功能亢进与皮质腺瘤等。

单项选择题
阅读理解

阅读理解。

    People often say, "Even without stepping out of my house I know all that has been

happening in the world."

    I think that is quite true, especially in modern times.

    We get all kinds of news from newspaper and TV and the Internet. This helps us to

understand the developing world, without having to go to the places where events are

really taking place.

    Newspapers not only carry news but also teach us many useful things, such as first

aid, cooking, playing games and chess, how to take good photographs and enrich us with

common sense.

    More and more people enjoy watching TV or going to Internet school everyday. Net

school is very useful in many ways. First of all, it can make teaching and learning much

easier with great interest. Students can get more information and knowledge in class. We

can send E-mails to all parts of the world at any time, and get the latest information

through the Internet.

    Reading a newspaper or watching TV or going to net school can widen our view of

knowledge. They help us improve our listening, speaking, reading and writing.

    Because of all these advantages, I like to read newspapers, to watch TV and go to net

school.

1. More and more people like to go to net school because ______. [ ]

A. it is a large school

B. everybody can read in it

C. it makes people happy

D. it makes our life easier

2. According to the passage, newspapers and TV can give people ______.

[ ]

A. gold and silver

B. knowledge

C. more time

D. the latest news throughout the world

3. What would be the best title of this passage? [ ]

A. Don't Sep Out of Your House.

B. Why I like to Read Newspaper, Watch TV and GO to Net School.

C. Carrying News.

D. The Best Way to Carry News and Learn Useful Things.

4. What can we get from newspaper and net school? [ ]

A. We can get all kinds of news.

B. We can learn many useful things.

C. We can improve listening, speaking, reading and writing.

D. All above.