若明渠水力最优矩形断面的水深为1.2m，其宽度为（）

当河流的断面宽深比≥（）时，可视为矩形河流。

水力最优梯形断面的水力半径是（）。

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.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

渠道断面的宽深比

关于渠道断面的宽深比选择说法错误的是（ ）

渠道断面的宽深比选择影响因素不包括（）

矩形断面明渠水力最佳断面的宽深比为β=2。（）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。