对于系统变量很多，各目标之间关系复杂的调度问题，最理想的求解方法是（）。

通常认为，管理信息系统主要解决结构化的决策问题，而决策支持系统则以支持半结构化和非结构化决策问题为目的。

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.

决策支持系统主要支持以下哪类决策问题?

决策支持系统主要包括定量决策问题的模型计算系统和定性决策问题的（）等。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。