A:pH试纸显深红色的溶液中:Cr2O72-、K+、C2H5OH、SO42-
B:含有0.1mol·L-1 Fe3+的溶液中:Fe2+、Mg2+、Cl-、NO3-
C:pH=0的溶液中:ClO-、Na+、K+、CH3CHO
D:室温下,水电离出的c(H+)=1×10-11溶液中:Na+、Cu2+、C6H5O-、SO42-
Welcome to Happy Days Club. It is a great place, fun and exciting.
Ball Game Center
You can play volleyball, tennis or other ball games here.
3:00 p.m.—10:00 p.m.
Tel: 375-4789
Swimming Pool
It's really cool!
4:00 p.m.—12:00 p.m.
Tel: 375-4753
Free Classes
Dancing
8:00 a.m.—12:00 a.m.
Tel: 375-4676
Skating
1:00 p.m.—6:00 p.m.
Tel: 375-4762
Kids Club
You can play or make friends here.
Tel: 375-4766
根据表格中的内容,选择最佳答案。