Is tenability human body normal what is visual vitamin?
可维持人体正常视觉的维生素是什么?
Correct mattess should be tactility softness, tall flexibility, curve of physiology of tenability human body and permeability is good.
正确的床垫应该是触感柔软,高弹性,可维持人体生理曲线并且透气性好。
The tenability of "Walras's law" is the prerequisite of general equilibrium, and the tenability of the law is the result of the aggregate of individual budget.