根据领导权变理论，领导的有效性取决于（）

影响领导有效性的因素有：（1）领导者的品质；（2）领导者的领导方式；（3）领导情景因素；（4）（）。

影响领导有效性的因素有：（1）领导者的品质；（2）（）；（3）领导情景因素；（4）领导者素质。

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。

简述制约领导行为的权变因素。

心理学家费德勒是最早对领导权变理论作出理论性评价的人。1962年费德勒提出了一个“有效领导的权变模型”，即费德勒模型。费德勒所确定的影响领导行为的三要素，正确的是（）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。