Make a list of the things you want to buy. ________, you will surely forget some of them.

A．Anyway

B．However

C．Otherwise

D．Therefore

当脱硫装置停电时，应首先进行（）

A、关闭溶液循环泵出口阀

B、向上级领导汇报

C、停止向重沸器进蒸汽

D、关进回收装置酸气总阀