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【单选题】
高压供电的工厂,最大负荷时的功率因数不得低于( )
A.
0.8
B.
0.85
C.
0.9
D.
0.95
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C.
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D.
信息发布有针对性
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A.
Folk music.
B.
Pop concerts.
C.
Opera.
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