消费者的消费支出不仅受目前收入水平的影响，而且也受自己过去收入水平和消费水平的影响，指的是消费行为哪方面特性?

当实际收入水平高于均衡的收入水平时，计划投资超过储蓄。（）

假如居民在不同的可支配收入水平上都增加储蓄，消费曲线将向上方移动。

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。

IS曲线描述的是与任一给定的利率相对应的当投资等于储蓄时会有的国民收入，故又称（）曲线。

从利率决定收入的情况看，在储蓄与投资相等时，利率影响投资，投资进而决定收入水平。（）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。