你能帮帮他们吗
在某温度下,测得纯水Ph为6.5,..1.计算此时水的离子积常数Kw为多少
1年前
英语选择1.I think the writer _____ wrote the book is very creati
1年前
英语翻译尊敬的葛思茂先生:值此先生生日之际,请接受来自远方朋友最诚挚的祝福,愿你身体健康,事业有成,家庭幸福.生日快乐!
1年前
We all know snails.They move very slowly.But do you know tha
1年前
帮翻译:She raced her friend,Donna Direct-Object all the way to
1年前
精彩回答