轴心受力的钢构件的强度，以截面应力达到（）为极限。

设计轴心受力构件时，轴心受拉构件只需进行强度和刚度计算。

轴心受压构件常见的屈曲形式有哪些？你的设计中，哪些构件是轴心受力构件？是如何保证其稳定性的？

试述三角形屋架和梯形屋架在受力上的区别？

三角形钢屋架的常用跨度在（）以下，梯形钢屋架的常用跨度可达（）。

梯形屋架下弦支座节点处应设（）性系杆。

梯形钢屋架节点板的厚度，是根据（）确定的。

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。