在氧化还原反应中，加入一种沉淀剂，若氧化型生成沉淀，（）电对

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问题单项选择题

在氧化还原反应中，加入一种沉淀剂，若氧化型生成沉淀，（）电对的电位，使氧化还原反应朝生成沉淀的方向进行。

A.降低

B.升高

C.不改变

D.改变

答案

参考答案：A

句型转换

句型转换。

1. Are the boys playing football? (作否定回答)

__________, they __________.

2. My mother is working. (改成同义句)

My mother is __________ __________.

3. He is going to Shanghai tomorrow. (改为一般疑问句)

__________he__________ to Shanghai tomorrow?

4. They are going to the Disneyland because they like the Mickey Mouse. (对划线部分提问)

__________ __________ they going to the Disneyland?

5. My brother is learning a dragon dance now. (就画线部分提问)

__________ is your brother __________ now?

单项选择题

给予抗酸剂治疗无效，仍出现持续性呕吐，则可引起

A．低钾性碱中毒

B．低氯高钾碱中毒

C．低氯低钾酸中毒

D．低氯高钠碱中毒

E．低氯低钾碱中毒