()为4号母线上所用变压器的隔离开关.
A、30
B、40
C、4—0
D、3—0
参考答案:B
根据句意和首字母提示补全单词。
1. He can't play with us, b_______ he has a lot of homework to do.
2. I don't like r_______
3. Please be q_______ when we are in the library.
4. Haikou is in the s_______of China.
5. The elephant _______ (come) from Yunnan.
人工扳动的道岔或道岔组,应由()一人负责管理。
A、扳道员
B、站务员
C、值班扳道员
D、值班清扫员