题目内容
正弦量的初相值和相位差的规定是C)。
2020-12-16
A.正弦量的初相不得超过±180°
B.正弦量的相位差不得超过土180°
C.正弦量的初相不得超过士90°
D.正弦量的相位差不得超过±90°
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