- 搜标题
- 搜题干
- 搜选项
多项选择题
（多选）以下说法正确的是
（多选）以下说法正确的是
(multiple choice) Which of the following descriptions are correct
A．在各向同性材料的物理方程中独立的材料系数有2个
For an isotropic material are two independent material coefficients necassary to fully describe the stress-strain relations (Hooke's law).
B．物理方程的性质是微分方程
The stress-strain relations are differential equations.
C．应用Voigt规则，可以将张量形式的物理方程写成矩阵形式
The tensor form of the stress-strain relations can be transformed into matrix form by using the Voigt rule
For an isotropic material are two independent material coefficients necassary to fully describe the stress-strain relations (Hooke's law).
B．物理方程的性质是微分方程
The stress-strain relations are differential equations.
C．应用Voigt规则，可以将张量形式的物理方程写成矩阵形式
The tensor form of the stress-strain relations can be transformed into matrix form by using the Voigt rule
