what can you observe when we mix blue cold water and red hot

问题描述:

what can you observe when we mix blue cold water and red hot water together
1个回答 分类:英语 2014-10-23

问题解答:

我来补答
at first,they won't just join toghter,they remain two parts.the blue cold water part bebeneath the red hot part.
 
 
展开全文阅读
剩余:2000
上一页:合外力做功,