准公共物品的基础设施，一般应该由政府公共投资来完成，纯公共物品的基础设施可采用公共投资与私人投资相结合的方式。

1974年（）《经济学中的灯塔》是公共物品私人提供理论研究之开端。

1974年，（）的《经济学中的灯塔》是公共物品私人提供理论研究之开端。

可以在（）阶段采用Make-or-buy决策分析。

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。

Demand curve（or demand schedule） 需求曲线（或需求表）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。