（）, 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。

（）为首的经济济学家把个量分析为主的微观经济学和以总量分析为主的宏观经济学拼和在一起形成了主流经济学派。

经济学分析方法有实证分析和规范分析。

下列方法中，外科经济学分析的基本方法是()

下列选项属于宏观经济学分析对象的是（）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。