简述直剪仪的优缺点。【三峡大学2006年研究生入学考试试题】

美国社会学家霍曼斯和布劳创立的社会学理论是（）

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.

创立交换理论的是美国社会学家霍曼斯和（）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

简述霍曼斯的理论缺陷。

霍曼斯的理论特色是（）。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。