G = E/2(1+v)
48 = E / 2*(1+0.25)
E = 120GPa
K = E / 3*(1-2v)
=120/ 3*(1-2*0.25)
= 80GPa
34. 一材料的蒲松氏比( Poisson’s ratio ) 為 0.25、剪..-阿摩線上測驗