农业技术经济学的基本要素有哪些？

农业技术经济学领域有哪些特殊矛盾？

专业技术是专门从事某一特殊领域工作或职业所需要的（）。

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.

与国民经济其他部门相比，农业有其自身的特殊性，主要表现在（）。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

以下哪些情况会造成提示“Incorrect number or IP address”？（）

汉族在科学技术领域对世界有哪些重要贡献？

影响和制约农业发展的矛盾有哪些？

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。