种子检验的内容包括扦样、检测和（）.

根据扦样的目的和对象不同，扦样可以分为几类？

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。

简述种子生产学的主要内容和任务。

散装种子扦样器：（）、（）。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

计算题：现有袋装小麦种子4000kg，每袋50kg，需要进行扦样，请计算需要扦样袋数。