【单选题】【消耗次数：1】
He doesn’ t spend much time____ his homework.
①
in
②
do
③
on
④
to do
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相关题目
【单选题】
In order to prepare a lecture, one must do a lot of research
and spend plenty of time____ his material so that his speech
is clear and easy to follow.
①
organizing
②
managing
③
operating
④
breeding
【单选题】
He will surely finish the job on time _______ he is left to do it in his own way.
①
in that
②
in case
③
as far as
④
so long as
【单选题】
_______ the look on his face, he doesn’t t quite understand what the speaker is saying.
①
Judge by
②
Judging by
③
To judge by
④
To be judged by
【单选题】
Isn’t it about the time you __________ to do morning exercises?
①
began
②
begin
③
should begin
④
have begun
【单选题】
Sandy could do nothing but _______ to his teacher that he was wrong.
①
admit
②
admitted
③
admitting
④
to admit
【单选题】
—The red dress fits me very much, doesn’t it?— .
①
Yes, it does.
②
You looks very beautiful.
③
It is a little tight.
④
wonderful
【单选题】
He didn’t keep on asking me the time any longer as he had had his watch ____.?
①
repaired ?
②
to repair ?
③
repairing ?
④
repair?
【单选题】
—Do you have much experience with caring for babies?— .
①
Yes, I do. I am responsible, loving, warm girl, and often take care of kids in my free time.
②
No, you are freshmen. You should work hard.
③
Yes, they are. They are very cute.
随机题目
【单选题】
电动机或电器元件在超过其额定电流的状态下运行，一般比短路电流小，不超过6倍的额定电流的大工作电流，需要进行（ ）保护。
①
短路保护
②
过载保护
③
过电流保护
④
失电压保护
【单选题】
当电动机正常工作时，如果由于某种原因而发生电网突然断电，为防止电压恢复时电动机的自行启动或电器元件自行投入工作而设置的保护，称为（ ）。
①
短路保护
②
过载保护
③
过电流保护
④
失电压保护
【单选题】
下列说法中正确的是（ ）。
①
电流的磁效应是英国物理学家法拉第发现的
②
电动机是利用电磁感应原理制成的
③
发电机是把电能转化为机械能的机器
④
奥斯特实验说明通电导体周围存在磁场
【单选题】
以下哪种电器可快速切断交流与直流主回路并可频繁地接通与大电流控制（达800A）电路的装置，所以经常运用于电动机做为控制对象，还具有低电压释放保护作用。
①
按钮
②
接触器
③
热继电器
④
熔断器
【单选题】
在电动机切断正常运转电源的同时改变电动机定子绕组的电源相序，使之有反转趋势而产生较大的制动力矩的方法称为（ ）。
①
能耗制动
②
机械制动
③
反接制动
④
回馈制动