发布时间:2025-01-27 12:32:37
坡度比就是高与底边的比。
通常把坡面的铅直高度h和水平宽度l的比叫做坡度,即tan a值 (a为斜坡与水平面夹角)
我余江人不知道要怎么样就可以人小孩在鹰潭一中或者四中上学一定要在鹰潭哪里有房是不
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