专有技术（Know-how）的基本特征是（）

公共关系专题活动的基本特征包括（）。

改革开放前我国对外贸易体制的基本特征是（ ）。

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。

简述法国经济学家1803年发表著作《政治经济学概论》提出了著名的“市场法则概论”。

对外贸易亦称国际贸易，对外贸易在一国经济中的基本作用是（ ）。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。