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问题 多项选择题

对供给手握式、移动式用电设备的末端回路或插座回路应不大于( )。

A．0.1s
B．0.2s
C．0.4s
D．0.8s

答案

参考答案：C

解析： GB50054—2011《低压配电设计规范》第4.4.6条或《复习指导书(供配电)》7.3.4.5。

补全对话，情景问答
问句答语匹配。
( ) 1. Who's that man?        
( ) 2. What's this?           
( ) 3. Where are you from?    
( ) 4. Nice to meet you.      
( ) 5. Is she your teacher?  		A. No, she is my grandmother.   
B. Nice to meet you, too.       
C. He is my father.                                                              
D. It's a book.                 
E. I'm from Beijing.          
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选择题

Helen felt _____ because she won the first prize in the school running race. [ ]

A. disappointed

B. proud

C. angry

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