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改变直流电动机电枢电压，直流电动机的机械特性不变。
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改变直流电动机电枢电压，直流电动机的机械特性不变。
A、对
B、错
时间：2022-01-19 15:59
关键词：
铁路职业技能鉴定考试
铁路机务系统考试
CMS专题
本科
机械设计制造及其自动化
答案解析
对
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