比较农业生态系统与自然生态系统的异同点。

农业生态系统的营养变化比自然生态系统（）。

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。

试论述循环经济与产业生态学的关系及其在环境规划中的作用？

1929年意大利的（）教授正式开设农业生态学课程并正式出版农业生态学一书。

生态系统中物质是循环的，在物质循环过程中属沉积型循环的是：（）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。