塑性材料的真应力－真应变曲线后期一直上扬，说明施加载荷和应力都在上升

He _______ to study harder in the future so that he cou...

单项选择题He _______ to study harder in the future so that he could have more opportunities to find a better job. A. he loved adventure B. cycling was a lot of fun C. he wanted to find himself a wife D. he supported environmental protection

下列属于正常胎位的有( )。A．LOA B．ROA C．LOT D．ROP E．RMA

多项选择题下列属于正常胎位的有( )。

The two pipes are made of the same material and are con...

单项选择题The two pipes are made of the same material and are connected as shown. If the cross-sectional area of BC is A and that of CD is 2A, The reactions at B and D when a force P is applied at the junction C are (                                        ).