过滤中和法用于含硫酸浓度不大于（），生成易溶盐的各种酸性污水_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题单项选择题

过滤中和法用于含硫酸浓度不大于（），生成易溶盐的各种酸性污水的中和处理。

A．1g／L

B．2～3g／L

C．3～4g／L

D．5g／L

答案

参考答案：B

改错题

l. We have become friends for many years.
2. I am going to phone him after school will be over.
3. He drank much too beer.
4. Smoking can hurt another people.
5. This is my poster about smoking. You can put up it on the wall now.

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单项选择题

白头翁汤中没有哪味药物（）

A.黄连

B.白头翁

C.黄柏

D.芍药

E.秦皮