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【单选题】
关于三相异步电动机,下列说法正确的是 。A.
鼠笼式与绕线式的定子绕组无区别
B.
绕线式的转子回路总是连接成三角形，便于星形/三角形启动
C.
鼠笼式的转子回路总是通过滑环和电刷串联电阻,改善启动性能
D.
绕线式比鼠笼式的三相异步电动机构造简单,性能好所以应用广
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