【单选题】【消耗次数：1】
直流电动机调速方式与负载性质不匹配时，电枢电流会？
①
变大
②
变小
③
不变
④
都不是
参考答案：
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相关题目
【单选题】
下列属于直流电动机调速的主要优点是（）。
①
调速范围大，调速比可达200 （他励式）以上（调速比等于最大转速和最小转速之比）。
②
以上都是
③
速均匀平滑，可以无级调速
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—I knocked over my coffee cup. It went right over _____ keyboard.—You shouldn’t put drinks near _____ computer.
①
the; /
②
the; a
③
a; /
④
a; a
【单选题】
The letters for the boss __________ on his desk but he didnt read them until three days later.
①
were put
②
was put
③
put
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has put
【单选题】
Someone called me up in the middle of the night, but they hung up _____ I could answer the phone.
①
as
②
since
③
until
④
before
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Is the hotel _____ offered you a job _____ you stayed the first time you arrived here?
①
which; where
②
the one; in which
③
where; that
④
the one that; which
【单选题】
—Have you heard about that fire in the market?—Yes, fortunately no one __________.
①
hurt
②
was hurt
③
has hurt
④
had been hurt
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When I get to the top of the building, the sun [填空].
①
shine
②
shines
③
is shining
④
was shining
【单选题】
To answer correctly is more important than ____.
①
that you finish quickly
②
finishing quickly
③
to finish quickly
④
finish quickly