由于施工工艺特点引起的工作中断所必需的时间是( )。
A.辅助工作时间
B.不可避免中断时间
C.必需消耗的时间
D.休息时间
参考答案:B
在对话空白处根据所给的首字母填入适当的单词,完成对话。
A: Did you have a great (1)t on your vacation?
B: Yes, I (2)d .
A: (3)W did you do on vacation?
B: I (4)v my grandparents in Emei Mountains.
A: (5)H were your grandparents?
B: They were fine. Thank you.
A: So (6)d you go to the mountains?
B: Of course, I did. And I saw (7)l of animals and tall trees there.
A: Did you give food to the monkeys?
B: Yes, I did. It was really interesting.
A: What (8)e did you do there?
B: I (9)t some (10)p . Look here, my photos.
A: Wow, They're great.
在系统中性点()方式时,接地故障电流最大。
A、直接接地
B、经电阻接地
C、经消弧电抗接地
D、不接地