N
neoaspilet11
Guest
你好每一个身体,请大家帮忙。推导扩散通过多孔固体,液体的浓度ü满足的偏微分方程。提示:通过一个区域的液体扩散的速率是该地区,并在该地区的垂直方向的浓度梯度成正比。预先感谢
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