稳定性是构件在外力作用下保持其原有平衡状态的能力。
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材料力学研究的是构件受到的外力,理论力学研究的是构件受到的内力。
A. 对
B. 错
材料力学研究杆件的哪几种变形形式? 轴向拉压,扭转,弯曲这三种基本变形。
A. 对
B. 错
All odd numbers are integers(整数). All even numbers are integers. Therefore, all odd numbers are even numbers.
A. 对
B. 错
There are no dancers that aren't slim and no singers that aren't dancers. Therefore, all singers are slim.
A. 对
B. 错