问题
单项选择题
现场供电系统应采用（）。
A、三级配电四级漏电保护
B、三级配电五级漏电保护
C、三级配电两级漏电保护
D、三级配电一级漏电保护
答案
参考答案：C
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现场供电系统应采用（）。
A、三级配电四级漏电保护
B、三级配电五级漏电保护
C、三级配电两级漏电保护
D、三级配电一级漏电保护
参考答案：C
| 给下面的问句选择合适的答语。 | |
| ( ) 1. What did you do yesterday evening? ( ) 2. Did he play computer games? ( ) 3. When did you go to Xi'an? ( ) 4. Where is the east Shanghai? ( ) 5. Who did Lingling go with? | A. Last summer. B. Her parents. C. I cleaned my house and washed clothes. D. It's in of China. E. Yes, he did. |