冬季寒潮时防止结晶池内析出大量芒硝的作业称为（）。
A.灌池
B.躲硝
C.撒淡
D.赶混
参考答案：B
— Dad, there's something wrong with my watch.
— ______. I can mend it for you. [ ]
A. You're right
B. That's right.
C. Never mind
D. That's OK
大量不保留灌肠时，溶液的温度一般为
A．37～39℃B．38～40℃C．39～41℃D．40～42℃E．4℃
