A:Fe、Cu、H2SO4溶液
B:Cu、Ag、FeSO4溶液
C:Fe、Ag、CuSO4溶液
D:Ag、FeSO4溶液、CuSO4溶液
一条毛毯138元,____,一共多少元?
—Tom wants to know if you _______ a picnic next Sunday
—Yes. But if it __________ , we’ll visit the museum instead