【单选题】
施工现场用电系统中，连接用电设备外露可导电部分的PE线可采用___。
A. 绝缘铜线
B. 绝缘铝线
C. 裸铜线
D. 钢筋
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答案
A
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施工现场配电母线和架空配电线路中，标志L1___、L2( B)、L3( C)三相相序的绝缘色应是(A )。
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【单选题】
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B. L1、N、L2、L3、PE
C. L1，、L2、N、L3、PE
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总配电箱中漏电保护器的额定漏电动作电流Ⅰ△和额定漏电动作时间T△的选择要求是___。
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B. Ⅰ△=30mA，T△＞0.1
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1___
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【单选题】
2___
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【单选题】
3___
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【单选题】
1___
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2___
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【单选题】
3___
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4___
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3___
A. She won't write any more books.
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4___
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1___
A. He broke the milk bottle.
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C. He made a mess inside the refrigerator.
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2___
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4___
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1___
A. Because he likes the sunny weather,
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C. Because it can help solve his sleeping problem.
D. Because it can help him forget all his troubles.
【单选题】
2___
A. To go sailing.
B. To go surfing.
C. To go to the beach.
D. To go to her nephew's.
【单选题】
3___
A. Going to visit relatives.
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4___
A. Surfing in the sea.
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2___
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【单选题】
3___
A. People aged16 to 24 preferred listening to music most.
B. more popularB It was geting more andamong the Bish people.
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4___
A. Older people go out to pubs more often.
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3___
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4___
A. He can take the train to the old part of the city.
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【单选题】
1___
A. About an hour.
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C. About half an hour.
D. More than one and a half hours.
