【判断题】【消耗次数：1】
直流电机运行是可逆的（）
①
正确
②
错误
参考答案：
复制
纠错
相关题目
【简答题】
直流电机是直流电能与机械能[填空]之间的电力机械。
随机题目
【单选题】
Our civilization cannot be thought of as ____ in a short period of time.
①
to have been created
②
to be created
③
having been created
④
being created
【单选题】
Here is some ____ advice to any young businessman.
①
variable
②
worthwhile
③
worthy
④
value
【单选题】
You must have stayed up late last night, _____?
①
mustn’ t you
②
don’ t you
③
didn’ t you
④
needn’ t you
【单选题】
Mr. Milton prefers to resign ____ part in such dishonest business deals.
①
than take
②
than to take
③
rather than take
④
rather than to take
【单选题】
If your new coat is too large, a tailor can____ it to fit you.
①
alter
②
transform
③
vary
④
change
【单选题】
Many automobile accidents were ____ careless driving.
①
attributed to
②
resulted in
③
contributed to
④
raised from
【单选题】
To obtain a satisfactory result, one must apply
two ____ of paint on a clean surface.
①
coats
②
levels
③
times
④
courses
【单选题】
No one would have time to read or listen to an account of everything ____going on in the world.
①
it is
②
as is
③
there is
④
what is
【单选题】
They have done things they ought_____.
①
not to do
②
not to be done
③
not to have done
④
not having done