圆轴受扭转时横截面上只有剪切应力。

圆轴受扭转时，其横截面上轴心处剪应力最大

圆轴受扭转时，其横截面上轴心处剪应力最大。

铸铁圆轴受扭后沿与轴线成45^°角的斜截面破坏，其原因是由该斜截面上的最大（）造成的。

如图1-5所示,空心圆轴受扭,横截面上扭矩为T,则该横截面上切应力的分布规律为( )。

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。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。