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.

When loading or discharging dry mud or cement，crew members should use goggles and（）.

Effects which are dutiable or subject to prohibitions or restrictions should be declared in （）.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

导游服务工作是一项脑力劳动和体力劳动高度结合的工作，其“脑力劳动”主要体现在 ：()

复杂劳动就是脑力劳动，简单劳动就是体力劳动。

机器是执行（）的装置，用来变换或传递能量或物料、（），从而代替减轻人类的体力劳动和脑力劳动。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。