如图1所示等截面直杆,F₁ = 40KN,F₂ = 60KN,F₄ = 30KN,则各段横截面上的轴力计算有误的一项是( )

图1

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。

在建筑力学中主要研究等截面直杆。

如图所示等截面直杆，截面积为A ₀，且b>a。在x=a处作用一个逐渐增加的力P。该杆材料为理想弹塑性，拉伸和压缩时性能相同。按加载过程分析结构所处不同状态，并求力P作用截面的位移δ与P的关系。

如图所示，直杆受扭转力偶作用，在截面1—1和2—2处的扭矩为：（）

（2006）如图所示，直杆受扭转力偶作用，在截面1—1和2—2处的扭矩为：（）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。