同步带传动已广泛应用与（）、（）、（）、（）、轻纺机械和石油机械等中小功率的机械传动中。

口服补液及时纠正脱水，应用ORS，说法正确的是（）

单导板式十字头结构简单，制造与安装容易，现在被广泛应用。

结构简单、便于制造、应用最广的轴是（）

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。

（）在旋转机械及往复机械的振动监测与诊断中应用最广泛。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。