问题 单项选择题 B型题

肾前性少尿表现为().

A.禁饮尿渗量<600mOsm/(kg·H2O)

B.禁饮尿渗量300mOsm/(kg·H2O)

C.一次性尿渗量>450mOsm/(kg·H2O)

D.一次性尿渗量<350mOsm/(kg·H2O)

E.禁饮尿渗量600~1000mOsm/(kg·H2O)

答案

参考答案:C

解析:5.肾浓缩功能正常时,尿渗量为600~1000mOsm/(kg·H2OO);等渗尿指尿渗量与血浆渗量相等,约为300mOsm/(kg·H2OO);一次性尿渗量可鉴别肾前性少尿和肾小管坏死导致的少尿,肾前性少尿,其肾小管的浓缩稀释功能正常,一次性尿渗量>450mOsm/(kg·H2OO);肾小管坏死,其浓缩稀释功能障碍,一次性尿渗量<350mOsm/(kg·H2OO);慢性间质性肾炎由于肾间质结构和功能受损,导致肾脏浓缩功能障碍,其尿渗量<600mOsm/(kg·H2OO)。

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     New rules and behaviour standards (行为规范) for middle school students came out (颁布) in March.

Middle schools are going to use a new way to decide who the top students are. The best students won't

only have high marks. The following are some of the new rules.

     Tell the truth. Have you ever cheated (作弊) in an exam? Don't do it again! That's not something honest

students should do.

     Do more at school. Good students love animals and care for other people. April is Bird loving Month in

China. Is your school doing anything to celebrate it? You should join! In that way, you can learn more about

animals and how to protect (保护) them.

     Be open to new ideas. Have you ever thought people could live on the moon? Maybe you'll find another

earth in space in the future. Everyone's new ideas are important.

     Protect yourself. Has a thief ever taken money from one of your classmates? Don't let it happen to you.

If you have to go back home late, you should let your parents know.

     Use the Internet carefully. The Internet can be very useful for your study. But some things on the Internet

aren't for kids, so try to look at the good web pages (网页). You can use the web pages for fun or homework.

1. What should the best students do in an exam?

                                                                                                                 

2. What should you do if you have to go back home late? 

                                                                                                                    

3. What can the children use the good web pages for? 

                                                                                                                    

4. When did the new rules come out? 

                                                                                                                    

5. Which new idea do you think may come true? 

                                                                                                                    

单项选择题