简答题 翻译：Plant organisms are far more abundant than animals, and the latter are directly or indirectly when carnivorous, dependent on the former.

翻译：Viscosity μ is the measure of fluids internal resistance to flow. It has a dimension of force time Ft per unit area L. 点击查看答案

翻译：In the laboratory measurement of porosity, it is necessary to determine only two of the three basic paramenters. 点击查看答案