机体细胞外液K+浓度的恒定主要依靠（） A.K+进入细胞内 B.K+经_爱下问搜题

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问题单项选择题

机体细胞外液K⁺浓度的恒定主要依靠（）

A.K⁺进入细胞内

B.K⁺经由远端肾小管排泌

C.K⁺经由近端肾小管排泌

D.K⁺经由消化道排出体外

E.以上都不是

答案

参考答案：A

完形填空

Soon it would be the holidays, but before that, there were final . All the kids had been working hard for some time, review their . If they didn’t pass the exams, they would have to them in September. There were usually a few who , but Jane didn’t want to be one of them. She had worked hard all year. She worked so hard that her mother her. Jane went bed late. The night before the big day, her mother that she should have an early night and take a sleeping pill. She promised to her up in the morning.
Jane was too to fall asleep. Her mind kept jumping from subject to subject. At last, the did work. In no time she was sitting in the examination hall, looking at the paper, but she couldn’t answer of the questions. Everyone her was writing pages and pages. she thought hard, she couldn’t find anything to write about. From time to time, she looked at her . Time was running . There was only an hour . She started one question, wrote two sentences, and tried another. With only an hour left, she wrote two sentences. By this time she was so worried that she started . Her whole body shook. It shook so much that she woke up. She was still in bed and it had all been a terrible . A minute later, called her name.

A．cared about

B．felt proud of

C．worried about

D．thought highly of

C．in front of

B．her teacher

C．a classmate

单项选择题

依据《环境保护法》，以下表述正确的是（）。

A.在风景名胜区新建的污染环境的工业项目必须做到达标排放

B.在自然保护区可以靳建污染物排放不超过规定排放标准的工业项目

C.在风景名胜区和其它需要特别保护的区域内可以建设污染物棑放量小的工业项目

D.在自然保护区不得建设污染环境的工业设施；建设其他设施，其污染物排放不得超过规定的排放标准