【单选题】【消耗次数：1】
在一个周期内，作用在同步电动机转子上的平均起动转矩为零。
①
正确
②
错误
参考答案：
复制
纠错
相关题目
随机题目
【判断题】
判断线上的内容是否正确：The past 22 years have really been amazing， and every prediction we’ve made about improvements have al come __true__
①
正确
②
错误
【判断题】
判断线上的内容是否正确：As the years passed, the memories of her childhood ___fired___ away.
①
正确
②
错误
【判断题】
判断线上的内容是否正确：He did not __compromise___ easily, but was willing to accept any constructive advice for a worthy cause.
①
正确
②
错误
【判断题】
判断线上的内容是否正确：___While___some people are motivated by a need for success, others are motivated by a fear of failure.
①
正确
②
错误
【判断题】
判断线上的内容是否正确：—Jack still can’t help being anxious about his job interview. —Lack of self-confidence is his___Achilles’ heel___, I am afraid.
①
正确
②
错误
【判断题】
判断线上的内容是否正确：These two chemicals ____interact_____ with each other at a certain temperature to produce a substance which could cause an explosion.
①
正确
②
错误
【单选题】
Wow. That’s a marvelous room. I’ve never known you’re so artistic!____________
①
Thank you for your compliments.
②
Don’t mention it.
③
Great, I am very art-conscious.
④
It’s fine.
【单选题】
Could you make an appointment with Doctor Wilson for me?____________
①
I cannot do it for you.
②
Im afraid all the appointments are filled.
③
You can have it.
④
Can I help you?
【单选题】
This box is too heavy for me to carry upstairs.__________
①
You may ask for help.
②
Let me give you a hand.
③
Please do me a favor.
④
I’d come to help
【单选题】
He cannot be tired _______ he has walked only half a mile.
①
since
②
whether
③
when
④
as long as