西方经济学家将经济周期分为哪些类型？

一般把经济周期分为四个阶段，这四个阶段为（）。

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.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

从系统生命周期的角度，信息系统资源管理可分哪两个阶段？（）

西方经济学理论认为，经济周期是因为（）

经济周期一般分为四个阶段，下列（）属于繁荣阶段的特点。

经济周期分为（）四个阶段。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。