_______control system is one in which the control action is independent of the output.

A．Feed back

B．Negative feed back

C．Close loop

D．Open loop

[单选题]（）is the management system to control the material consumed reduce inventory in the manufacture company.A .DPRB .LPRC .MRPD . D.ERP

[单选题]In the following activities, which one needs most control?A.Retelling.B.Fin

[单选题]In the following activities, which one needs most control?A.Retelling.B.Fin

[单选题]Remote control means that the system is being controlled by the operator who is situated （） from the system.A . automaticB . localC . remoteD . manual

[单选题]英语AUTOMATIC CONTROL SYSTEM指（）A .控制网络B .自动控制系统C .控制面板D .控制盘

[单选题]( )，may I have a question on the control system presentation？A.I’m sorryB.T

[单选题]To control and manage processes, which of the following data structures should be set up?A．PCTB．PCBC．PCMD．PCL

[单选题]Which of the listed pressure control valves would be used to establish the maximum operating pressure of a hydraulic system?A．Pressure-reducing valveB．Unloading valveC．Counterbalance valveD．Pressure-relief valve

[名词解释] 连续式调速系统 continued speed control system

[单选题]The control mode in which tile final control element is moved from one of two fixed positions to the other is known as______.A．dead band actionB．neutral zone actionC．rangeD．on-off action