问题 单项选择题

+2.00DC×90°与-2.00DC×180°联合后得到()

A.+2.00DS/-2.00DC×90°

B.+2.00DS/-4.00DC×180°

C.+2.00DS/-4.00DC×90°

D.-2.00DS/+2.00DC×90°

E.-2.00DS/+4.00DC×180°

答案

参考答案:B

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