直流电动机的缺点之一是 _1．_刷题宝

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直流电动机的缺点之一是 ____．

上一题下一题 0.0难度选择题更新时间:2018-12-16 10:09:44

答案(点此获取答案解析）

只能用直流电源供电．

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