wendy1992的个人空间

wendy1992： 急！羧酸的结构简式！

羧酸的结构简式到底哪些键可以省？哪些不可以省?那酯呢？ 谢谢

2010-06-05 10:57 来自版块 - 

wendy1992： 问问

better education means more as often as not,good jobs.中，more as often as not 是什么意思啊，是不是一个固定搭配啊？ 谢谢

2010-05-21 14:11 来自版块 - 

wendy1992： 高人帮忙！

at first view 与at first sight有什么区别啊？？？？？？？

2010-01-08 21:08 来自版块 - 

wendy1992： 高人请帮忙！！

PH=4.75 浓度都为0.1mol∕L的HAC和NaoH混合，C(CH3COO‐)+C(OH-)与C(CH3COOH)+C(H*)的大小关系是什么？？ 谢谢

2009-11-27 21:38 来自版块 - 

wendy1992： question

being a parent is not easy,and being the parent of a child with special needs often carries with __extra stress.A.it B them Cone D onesan... 全文

2009-11-20 23:03 来自版块 -