在n个产地、m个销地的产销平衡运输问题中，（）是错误的。

对于m个产地n个销地的产销平衡的运输问题而言，模型最多只有（）个独立约束方程。

有6个产地4个销地的平衡运输问题模型具有特征（）

有m个产地n个销地的平衡运输问题模型具有特征（）

有3个产地4个销地的平衡运输问题模型具有特征（）

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。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。