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。

边际效用递减意味着，随着对一种商品消费数量的增加，（）。

随着消费商品数量的增加边际效用（）、边际效用会小于零

在维持效用水平不变的前提下，随着一种商品的消费数量的连续增加，消费者为得到一单位的这种商品所需要放弃的另一种商品的消费量是（）。

边际效用递减意味着，随着对一种商品消费数量的增加，（  ）。。

有些商品的需求随着消费者收入的增加而减少，这些商品为（）。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。