請問蹺蹺板法的支點要怎麼設?

81 views
Skip to first unread message

lovers guitar

unread,
Jan 16, 2018, 8:14:01 AM1/16/18
to 費因曼討論區
請問老師，我怎麼知道要先設誰是支點?
Reply all
Reply to author
Forward
0 new messages