淀粉加碘变蓝色?
1,淀粉溶液2ML+唾液2ML37`C,5min
2,淀粉溶液2ML+水2ml37`C,5min
3,淀粉溶液2ML+稀释的唾液2ml37`C,5min
4,淀粉溶液2ML+唾液2ml95`C,5min
5,淀粉溶液2ML+唾液2ml+三滴盐酸37`C,5min
A-123B-234C-345D-245能说的仔细一点吗?