一、使用LIKE、BETWEEN、IN进行模糊查询 二、在查询中使用聚合函数 三、使用GROUP BY进行分组查询 四、进行多表联结查询

Extend definition to material bodies: total work is the addition of the work done on all particles by forces distributed over the volume W by forces distributed over the surface t·udS

一. 概述 二. 挥发油的通性 三. 提取 四. 分离 五. 挥发油成分的鉴定

The following stress-strain curves were obtained for dif- ferent materials subjecting the specimen to the loading path(a, b, c, d ). Which one(s) of them correspond to elas- tic material(s)

For the uniform state of plane strain shown in the fig ure,which one(s) of the following statement(s) is(are valid?(Assume Poisson's ratio v+0)

Concept Question Consider the following simple displacement field

一、结构类型 二、理化性质 三、提取分离 四、结构鉴定 五、生物活性

We seek to characterize the local state of deformation of the material in a neighborhood of a point P. Consider two points P and Q in the undeformed

一、公式推导： 二、符号规定：

高等教育出版社：《材料力学》配套教材电子教案（PPT课件）第十章 考虑材料塑性的极限分折（10.4）梁的极限弯矩·塑性铰