在竖向荷载作用下，产生水平反力的桥梁结构为（）。

在竖向荷载作用下，产生水平反力的桥梁结构为（）

在竖向荷载作用下，产生水平反力的桥梁结构为__。

在竖向荷载作用下无水平反力的结构桥梁是____

简述布尔算符（OR）的作用。

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。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

在竖向荷载作用下无水平推力的是（　）桥梁结构。

在竖向荷载作用下，产生水平反力的桥梁结构为（）。