在中学数学、物理、化学、生物等理科课程中，经常运用的教学方法主要有()

中学数学传统的教学方法有讲解法，谈话法，练习法，讲练结合法，教具演示法。

中学数学课上的测量练习、生物课上的植物栽培和动物饲养等活动属于教学方法中的（）。

1992年《生物多样性公约》是第一个全球性综合保护生物资源的公约。

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.

依据《全国生态环境保护纲要》，生物物种资源的开发应在保护（）的前提下进行。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。