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【单选题】
闭环控制系统中,测量装置通常安装在 ( ) 上。A.
伺服电机
B.
机床工作台
C.
主轴
D.
滚珠丝杆
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反馈参考答案：
举一反三
【单选题】She likes to wear ________ diamond necklaces and always keeps the real ones in her safe.
A.
genuine
B.
true
C.
fake
D.
fade
【单选题】Though (he is) very busy, he ________ himself to exercise at least twice a week.
A.
begs
B.
disciplines
C.
decides
D.
makes
【单选题】She went on with her training ________ the fact that her doctor had told her to rest.
A.
despite
B.
although
C.
even though
D.
in spite of
【单选题】We're not sure whether we still want to ________ with the sale.
A.
provide
B.
prolong
C.
precede
D.
proceed
【单选题】VB中Do......Loop结构既可以构成当型循环,也可以构成直到型循环,根据下面的代码: Dim i,n as Integer n = 20 i = 1 Do Print i; i = i + 2 Loop Until i >20 判断循环结构的类型和循环体的执行次数 ,正确的选项是
A.
当型循环 ,20次
B.
直到型循环 ,10次
C.
当型循环 ,10次
D.
直到型循环,20次
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