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。

两直径不等的圆柱正交时，相贯线一般是一条封闭的（）。

两直径不等的圆柱与圆锥正交时，相贯线一般是一条封闭的（）。

提出“每一条约束罪犯的法律，都是一条罪恶”的是谁？（）

若供给曲线上每一点的点弹性都等于1，则供给曲线只能是一条（）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

流线不能相交（），也不能是折线，因为流场内任一固定点在同一瞬间只能（），流线只能是一条光滑的（）。