题目内容
(请给出正确答案)
提问人:网友wittyboy
发布时间:2022-01-07
[主观题]
DC motors have that wear out and need replacing from time to time.
A、rotor
B、commutator
C、carbon brushes
D、stator
简答题官方参考答案
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A、rotor
B、commutator
C、carbon brushes
D、stator
A、appropriate
B、appropriately
C、appropriation
A、H Bridge
B、slip ratio
C、phase number
D、Pulse Width Modulation
A、frequency of pulse
B、number of pulse
C、number of phase
D、number of rotor teeth
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