（）, 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。

在经济开放的国家或地区，（）加上国外净要素收入等于国民生产总值。

生产要素的最适组合（最佳配置）的条件是指（）

什么是生产要素的最佳组合？

生产扩展路线是在不同生产规模下，生产要素的最佳组合。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。