在产销平衡运输问题的数学模型中，约束条件的关系是（）。

在产销平衡运输问题的数学模型中，约束条件的关系是（）。

在产销平衡运输问题的数学模型中，约束条件的关系是（ ）。

我们可以通过(   )来验证模型最优解。 

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。

如果问题存在最优解，则下面几种搜索算法中，（）必然可以得到该最优解

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。