闭环系统比开环系统及半闭环系统( )。

闭环控制系统比开环控制系统及半闭环控制系统（ ）

闭环控制系统比开环控制系统及半闭环控制系统（）

什么叫开环控制系统、半闭环控制系统和闭环控制系统？

Every deliberate act of wrongdoing by the master or any of the crew against the ship or cargo，without the authorization or privity of the Shipowner or his agent，is（）.

（）, or drum is used for hauling in or letting out the wires or ropes which will fasten the ship to the shore.

A salvor may be（）the whole or part of the payment due under Salvage Convention to the extent that the salvage operations have become necessary or more difficult because of fault or neglect on his part or if the salvor has been guilty of fraud or other dishonest conduct.

试论述开环伺服控制系统、闭环伺服控制系统及半闭环伺服控制系统的工作原理及结构特点。

闭环控制系统比开环及半闭环系统（）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

开环控制系统比闭环控制系统的控制精度（）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。