发电机定冷水离子交换器的作用是什么?
参考答案:
发电机定冷水离子交换器的作用是净化冷却水,使整个系统中的冷却水保持高纯度,保证导率不高于0.5us/cm。
用所给单词的适当形式填空。
1. Many ______ (child) don't like to see the doctor.
2. Mr King ______ (not) work in the office.
3. Julia and Molly are ______ (police).
4. Mr Green is a ______, he______ English in No.1 Middle school. (teach)
5. There are three bank ______ (clerk) in the room.
小肠的生理功能是
A.腐熟水谷B.泌别清浊C.传导糟粕D.运行元气E.贮藏胆汁