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.

水力光滑管与水力粗糙管.

何谓水力光滑管？何谓完全湍流粗糙管？

壁面光滑的管道一定是水力光滑管。（）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

在压力管道的水力计算中，长管是指（）

管路水力计算中的所谓长管是指（）

摩擦是一门新兴学科，它涉及数学、力学、物理、化学、冶金学、石油学、化学工程等学科。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

给水管道中，一种新型管材、质轻、无毒、内壁光滑、不结垢，使用温度可达90℃，适用于输送自来水、生活热水和采暖空调工程的管道是（　）。