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单选20、变流器工作在逆变状态时,控制角α必须在度。( )

A、0°-90°;

B、30°-120°;

C、60°-150°;

D、90°-150°;

时间：2021-07-17 23:58 关键词：电气工程及其自动化专升本电子技术 2020年第二学期期末考试

答案解析

D

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