挤出法生产的管材有软管和（）之分，但是工艺流程大致相同。

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.

简述气敏陶瓷与湿敏陶瓷的差别。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

无粘接预应力混凝土施工的主要工艺有（）。

货船是专门运输货物的船舶。有干散货船、（）、集装箱船之分。

无论是长期成本还是短期成本都有不变成本和可变成本之分。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。