A:混合液的pH=7
B:a=
C:混合液中Kw=c(H+)2
D:a=b,VA=VB
通过绘上学路线图,我们____了沿路的情况。以后就可以结伴去____了。
What would you like to eat?( )
扫 sǎo____ sào____
扇 shàn____ shān____
—Where are you going? —Bookstore. I'm going to buy a new ____ ____.