对于市场挑战者而言，最有效和最经济的战略形式为（）。

市场挑战者的战略目标是有效的防御其它竞争者的攻击,并在市场上跟随市场领导者。( )

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。

市场挑战者集中全力向对手的主要市场阵地发动进攻，就是正面进攻。

集中优势力量攻击对手的弱点，这种市场进攻策略叫做（）。

市场挑战者集中优势力量攻击对手的弱点，这种策略是（）。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。