逻辑无环流可逆调速系统反转过程是由正向制动过程和反向启动过程衔接起来的，在正向制动过程中包括（）两个阶段。

口服补液及时纠正脱水，应用ORS，说法正确的是（）

可以在（）阶段采用Make-or-buy决策分析。

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.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

通信系统根据是否采用调制，可分为基带传输系统和调制传输系统。

在数据通信系统中，采用频带传输时，在传输之前，首先要对要传送数据信号进行（）操作。