A:滴加石蕊试液显红色的溶液 Fe3+、NH4+、Cl-、SCN-
B:pH值为1的溶液 Cu2+、Na+、Mg2+、NO3-
C:水电离出来的c(H+)=10-13mol/L的溶液 K+、HCO3-、Br-、Ba2+
D:所含溶质为Na2SO4的溶液 K+、CO32-、NO3-、Al3+
— Yes, I ___________, and it won't take long.
You can take anything from the shelf and read, but please ________ the books when you've finished with them.
如图为亚洲区域示意图,读图完成下列问题.