根据和（）程度不同，可将市场分为完全竞争市场、完全垄断市场、垄断竞争市场、寡头垄断市场。

不完全竞争市场分为（　　）。Ⅰ．有效竞争市场Ⅱ．垄断市场Ⅲ．寡头市场Ⅳ．垄断竞争市场

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。

寡头垄断市场可以分为纯粹寡头垄断和异质寡头垄断。

什么是寡头垄断？寡头垄断市场的特征有哪些？

垄断竞争中运输市场寡头垄断的运输市场是两种极端市场（）

寡头垄断是一种普通的市场结构形式，许多国家的（）都属于寡头垄断的市场结构

我国人身保险市场依然处于寡头垄断市场向垄断竞争市场过渡的阶段。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。