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搜题
【单选题】
控制最基本的目的在于( )。
A.
寻找错误
B.
衡量雇员绩效
C.
保证组织中的各项活动按计划和标准进行
D.
使人们失去自由
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举一反三
【单选题】Compared with the work of Hamilton, what dose the author consider Fisher's work to be?
A.
It is inaccurate but popular, compared with Hamilton's work.
B.
It is accurate, but trivial compared with Hamilton's work.
C.
It is admirable, but not as up-to-date as Hamilton's work.
D.
It is valuable, but at a relatively low level.
【单选题】The capital of New Zealand is
A.
Christchurch
B.
Auckland
C.
Wellington
D.
Hamilton
【简答题】xy平面中的转子Hamilton量为 ,I为转动惯量.
【判断题】滚子从动件耐磨损,可传递较大的动力,但结构复杂,尺寸和重量大,不易润滑及销轴强度低,广泛应用于中、低速。
A.
正确
B.
错误
【判断题】机械振动多属于受迫振动和自激振动。
A.
正确
B.
错误
【简答题】磁铁让我们知道了一种神奇的力叫 ( )。
【单选题】To: Rachel Porter From: Sara Hamilton Date: September 15 Subject: Trade Fair for September 23 Dear Ms. Porter, I am sorry for my late response to your e-mail. The division manager has been so busy rec...
A.
They must include an itinerary.
B.
They must be approved by a manager.
C.
They must include receipts.
D.
They must estimate meal costs.
【单选题】三相半波可控整流电路电感性负载有续流二极管时,若控制角α为( ),则晶闸管电流平均值等于续流二极管电流平均值。
A.
60°
B.
90°
C.
120°
D.
30°
【简答题】按产生振动的原因分类,振动分为自由振动、受迫振动和自激振动,因机械故障而产生的振动多属于()、()
【单选题】被控变量的测量值就是( )环节输出的信号。
A.
控制阀
B.
控制器
C.
被控对象
D.
变送器
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