以下四组380V供电系统电压偏差值( )超出了允许偏差.A. +5%, -6%; B -10%, -5%, C.+7%, -7%; D. +10%, +5%,

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问题 以下四组380V供电系统电压偏差值( )超出了允许偏差.

选项 A. +5%, -6%;
B -10%, -5%,
C.+7%, -7%;
D. +10%, +5%,

答案CD

解析
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