A:滤液中只有Al2(SO4)3
B:滤渣中一定有Cu,不可能有Al
C:向滤渣中滴加稀盐酸,一定有气泡产生
D:滤液中一定有CuSO4,可能有Al2(SO4)3
Dolly is a middle school girl. Her parents want to take her to Ice and Snow Festival. How much will they pay for the tickets?
在四边形ABCD中,“AB→=2DC→”是“四边形ABCD是梯形”的( )
我国夏季日均温最低的地区是( )