皮皮学，免费搜题
登录
搜题
【单选题】
该电路图中,当红色“×”所在导线断开时,下面说法正确的是A.
按下SB2按钮，主轴电动机能连续工作；松开SB2按钮，主轴电动机也能连续工作。
B.
主轴电动机不能停止。
C.
主轴电动机不能启动。
D.
主轴电动机只能实现点动控制，即按下SB2按钮，主轴电动机启动运行，松开SB2按钮，主轴电动机停止运行。
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【简答题】After finishing shopping in the supermarket, I and my wife Julie stood in the shortest line. There was only one guy in it, but he was in a 31 and there seemed to be some trouble going on. Well, I and ...
【简答题】句型转换。 1. My aunt gave me not only some books but also some advice on study. (同义句转换) My aunt gave me not only some advice on study ______ ______ ______ some books. 2. I don't want to go by coach, I wan...
【单选题】She to go out alone in the evening.
A.
could not
B.
might not
C.
dare not
D.
doesn’t dare
【单选题】She dare not go out of the house, _______?
A.
dare she
B.
daren't she
C.
does she
D.
doesn't she
【单选题】She dare not go out in the dark evening, ________? (2016 年南通一模 )
A.
A ． doesn’t she
B.
dare she
C.
does she
D.
daren’t she
【单选题】.It is dark, and the wind is blowing strongly outside, so she ________ out alone.
A.
dare not to go
B.
dares not go
C.
doesn’t dare to go
【单选题】听力原文：M: What kind of father am I? My only son almost died and I didn't even know he was ill. W: Don't blame yourself. You were too busy to pay attention to him. If his mother was still alive, things w...
A.
His only son is dying.
B.
He didn't like after his sick wife.
C.
His mother died some time ago.
D.
He hasn't taken good care of his son.
【单选题】如图所示，两飞轮A、B组成一摩擦啮合器。A通过与B之间的摩擦力矩带着B转动。则此刚体系在啮合前后：【图片】
A.
角动量改变，动能也变化
B.
角动量不变，动能变化
C.
角动量不变，动能也不变
D.
角动量改变，动能不变
相关题目：
参考解析：
知识点：
题目纠错 0
发布
