题干
— We often use QQ to chat with friends on the Internet.
— Really? Will you please show me it?
A：how to use
B：what to use
C：what do I use
答案(点此获取答案解析）
A
— We often use QQ to chat with friends on the Internet.
— Really? Will you please show me it?
A：how to use
B：what to use
C：what do I use
在由水电离出的c(OH－)=10-13mol·L-1的溶液中：Na+、Ba2+、Cl－、I－