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【单选题】
关于中性线正确的说法是A.
A中性线的作用是使不对称负载得到对称的电流
B.
B中性线的作用是使不对称负载得到对称的电压
C.
C中性线上能装开关
D.
D中性线能装熔断器
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A.
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B.
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C.
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D.
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