不定项选择

永磁式刮水电动机是通过改变正、负电刷之间串联线圈的个数来实现变速的。( )

A．正确
B．错误

你可能感兴趣的试题

多项选择题

《华夏集》是______。

A．一本有影响的译诗集
B．英美现代派诗歌的作品之一
C．庞德的代表作
D．庞德创作的转折点

单项选择题

The second main reason for their unhappiness is that ______.
A.
they have been working in a company for too long
B.
they are not permitted to change a job

C.
they have no other way out than keep working
D.
they have to work on to pay off their debts