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.

以下几个微分方程表示的系统中，属于线性定常系统的是（）

线性控制系统各环节均可用线性微分方程来描述，非线性控制系统中环节都具有非线性性质。

简述线性定常控制系统稳定性的充分必要条件。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

F1系列PLC—OR指令表示（）。

FX2N 系列可编程序控制器输入常开点用( )指令。 A、LD B、LDI C、OR D、ORI

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。