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问题 多项选择题

关于钾的代谢，下列说法正确的是（）。

A.体内98％的钾分布在细胞内，2％在细胞外

B.血浆钾仅占总量，0.3％，浓度为3.5～5.5mmol/L

C.细胞膜上的钠泵，使细胞排钠保钾

D.肾有较好的排钠功能，但无有效的保钾能力

E.肾是排钾的主要器官

答案

参考答案：A, B, C, D, E

填空题

根据句意填单词，首字母已给出。

1. We should brush our t_________ every day.

2. If you have a toothache, you must go to see a d_________.

3. I'm very t_________, I want to drink some water.

4. I have an i_________ meeting. I must go now.

5. —Peter. What's the m_________ with you?

    —I'm very tired.

6. His temperature is very high. He has a f_________.

7. You have a sore throat. You should drink some hot tea with h_________.

8. We should try our best to keep the b_________ of nature.

9. He is very tired at the m_________. He is sleeping now.

10. —What's wrong with you, Mary? 

      —I have a bad s_________.

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单项选择题

关于病毒的十诫，下列说法不正确的是（）。

A.任何时候都不要禁止你的病毒防火墙

B.设置始终显示文件的缩写名

C.及时升级杀毒软件

D.定期备份数据
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