A: NH4+,SO42-,K+,OH-
B: H+,Ba2+,NO3-,SO42-
C: K+,Cl-,CO32-,Na+
D: Ca2+, NO3-,Na+,CO32-
He spent one day _____with his friends.
①要学会鉴别不同的情趣
②情趣有高雅和庸俗之分
③不同的情趣对我们产生不同的影响
④我们应追求高雅情趣
I think your story is ________ his.