若设定的条件表达式为“＜60 Or＞100”，则表示( )。

假山的结构重心必须稳定，但视觉重心可以不稳定。

流体处于平衡状态的必要条件是:( )

静力学主要研究合力和平衡条件两个问题

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。

刚性转子静平衡的力学条件是（），而动平衡的力学条件是质径积向量和等于零，离心力引起的合力矩等于零。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。