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.

The （） is used for hauling in or letting out the wires or ropes.

Vessels must be（）valid certificate of nationality or certificated of registry or license.

闭环控制系统的调速范围比开环控制系统的调速范围宽。

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。

数控车床按控制方式分类有开环控制系统，半闭环控制系统。

数控机床按控制系统的特点可分为开环、闭环和半闭环系统。（）

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。