将位置检测装置装在移动部件上,直接测量移动部件的实际位移来进行位置反馈的进给系统,称为()。
A. 开环伺服系统
B. 闭环伺服系统
C. 半闭环伺服系统
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Peter is the sales manager of the company.
A. 对
B. 错
Peter is the personnel manager of the company.
A. 对
B. 错
The company is one of the leading companies in this industry.
A. 对
B. 错
Laura is proud of being a member of the company.
A. 对
B. 错