點樣浮起舊金屬呢??
回答 (2)
2007-08-31 3:42 pm
increase the desity of the liquid (eg add alot of salt to water can increase the desity of water and that can cause a copper coin flow on top of the water)
參考: myself
收錄日期: 2021-04-13 15:14:13
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070829000051KK04547