使用摇表测量绝缘前后,必须将被试设备()。
A.清理干净
B.摆放整齐
C.对地放电
D.都不必考虑
参考答案:C
The film’s ending follows a set pattern, but, _____, it is worth seeing a second time.
A.on the other hand
B.in other words
C.all in all
D.in the meanwhile
说明演替的基本类型。