工程力学是一门与工程技术密切联系的（）基础学科。

佛汝德数Fr是判别下列哪种流态的重要的无量纲数 ( )

《联合国宪章》第六章的主要内容是（）。

独立避雷针是离开建筑物单独装设的。第六章

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。

已知梯形断面渠道底宽b=10m，边坡系数m=1.5，水深h=5m，流量Q=300m3/s，试求佛汝德数及渠中流动状态。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。