[ѧ]СܶH
2007-5-17 14:31:14
ԭ:
[ѧ]СܶH?
ѡ:+Ӳ
A.Na+
B.HCO3-
C.NH3
D.K+
E.ˮų
𰸣
D

𸴣СܶH+ǺͶԼӵżģؽH+ӻСܶԼصӡ
[ҽѧѧ]ҽϡ [2007-5-17]
[Ԥҽѧ] [2007-5-17]
[Ԥҽѧ] [2007-5-17]
[Ԥҽѧ] [2007-5-17]
[Ԥҽѧ] [2007-5-17]