A:Ca2+、CO32﹣、OH﹣、Na+
B:Na+、SO42﹣、OH﹣、Cl﹣
C:Ba2+、H+、OH﹣、Cl﹣
D:NH4+、NO3﹣、OH﹣、K+
设 a=130.2,b=213,则a,b 的大小关系是( )
下面句子中加横线的成语使用错误的—项是( )
- Many people talk about “Didi“. I really wonder ______.
- You call to order a taxi through it on your mobile phone easily.
根据提示信息列举相关内容。