《维规》规定电话集中机单线对机壳绝缘电阻应为()。
A.≥10MΩ
B.≥15MΩ
C.≥250MΩ
D.≥50MΩ
参考答案:A
补全对话。
1. A: ____________________________________________?
B: I ate good food on my holiday.
2. A: ____________________________________________?
B: I went to Nanjing.
3. A: ____________________________________________?
B: Yes, we played football yesterday.
4. A: ____________________________________________?
B: I have a cold.
背诵默写。(每空一分,共10分)
(1) , ,谁主沉浮?
(2) ,油油的在水底招摇;
(3)高渐离击筑,荆轲和而歌, , 。
(4)惨象, ;流言, 。
(5)于嗟鸠兮, !于嗟女兮, !
(6)昔我往矣, 。