问题
单项选择题
当相导体与中性导体间短路时,在5s内应力电压能达到()。
A.1.77U0
B.1.5U0
C.1.45U0
D.1.35U0
答案
参考答案:C
当相导体与中性导体间短路时,在5s内应力电压能达到()。
A.1.77U0
B.1.5U0
C.1.45U0
D.1.35U0
参考答案:C
口语应用(10分) 根据方框中的7个选项,从中选择5个答案填入对话中,使对话意思完整。
B:I went to the concert. A:2 B:Yes. I had a good time. I enjoyed the music and songs very much. A:3 B:They were very good. A:When will there be the next concert? B:Next Friday evening. 4 A:Yes, I do. 5 B:50 yuan. A:It’s kind of expensive. B:I agree. |