Friction- A force opposing/resisting the movement of a surface when in contact with another.
This is what I'm going to write for the test...is this a right definition?
收錄日期: 2021-04-21 17:11:43
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20160303234848AAuGYel