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。

凶猛鱼类是有害鱼类，所以在养殖水体中应捕尽杀绝。

养殖鱼类浮头常表明养殖水体（）

在一个水体中养殖一个鱼类品种称为（）

在一个水体中养殖两个以上的鱼类品种称为（）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

单胞藻在水产养殖上应用有哪些用途？