【判断题】【消耗次数：1】
交流电机绕组通入三相变流电时、若对调其中的两根引出线接到电源上，电机旋转方向不变。
①
正确
②
错误
参考答案：
复制
纠错
相关题目
【判断题】
星形联接的交流电机的定子绕组接于三相对称电源，当绕组内有一相断线时，产生的?基波合成磁势为脉振磁势，该磁势可分解为：两个幅值相等、转速相同、转向相反的旋转磁势。
①
正确
②
错误
随机题目
【单选题】
A: Thank you for your invitation. B: [填空].
①
Its a pleasure
②
It doesnt matter
③
Its a small thing
④
Ill appreciate it
【单选题】
A: Will the speech last long? B: [填空].
①
Im afraid it will
②
Yes, the speech lasts
③
No, the speech doesnt last
④
Not at all
【单选题】
—I want to have my CD player fixed, but I cant find a repair shop. —Oh, I know_____ . Come on, Ill take you there.
①
one
②
the one
③
ones
④
many
【单选题】
Ive lost my pen. I cant find it anywhere, so I have to buy ____ after school.
①
it
②
one
③
this
④
that
【单选题】
—Can I help you?—Id like to buy a present for my fathers birthday, _____ at a proper price, but of great use.
①
that
②
anyone
③
one
④
everything
【单选题】
A: [填空]? B: Id like a cup of coffee.
①
What do you want
②
What are you looking for
③
What can I do for you
④
Do you want to buy anything
【单选题】
—He has two brothers and three sisters. Do you know____ of them?—No, I know ____ of them.
①
some; none
②
some
③
any; none
④
either; some
【单选题】
A: Would you like to order now? B: [填空].
①
Im full now
②
But the price is high
③
Yes, Id like fish and soup
④
Its very kind of you
【单选题】
A: Im sorry. Robert is not in his office. B: [填空]?
①
Are you sure for that
②
Would you like to leave a message
③
Can you take a message for me
④
Can he phone me
【单选题】
A: Were you at home last night? B: [填空].
①
Certainly
②
Certainly I was
③
Sure I was
④
O.K