根据微观经济学的观点，消费者对企业产品的需求是一种企业对劳动力的需求的派生需求。

消费者剩余是消费者的（）。

消费者剩余是消费者的（　）

消费者剩余是消费者的（）。

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.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

简述消费者剩余和生产者剩余的含义以及对经济分析的意义？

区分消费者剩余和生产者剩余。这两个概念与国家经济福利有什么关系？

画出一个进口国的供求图。在允许贸易之前，消费者和生产者剩余是多少？有自由贸易时，消费者和生产者剩余是什么？总剩余有什么变化？

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。