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【单选题】
The alternating current generator supplying a load has a voltage drop resulted from the loadWhen the load has a lagging power factor this voltage drop （）.A.
is small
B.
may be neglected
C.
is useful
D.
is considerable
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A.
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B.
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C.
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D.
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A.
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B.
R 表示“≤”关系
C.
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D.
R 表示“≠”关系
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stress ( 没有强调) It’s no use asking him about that.A. It’s ' no ' use asking him about ' that. B. It’s ' no ' use asking ' him about ' that. C. It’s ' no ' use ' asking him about ' that. D. It’...
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