Câu trả lời:
Oxit axit CO2,H2O,N2O5,P2O5,SO2CO2,H2O,N2O5,P2O5,SO2
Oxit bazo CaO,BaO,Na2O,K2O,MgOCaO,BaO,Na2O,K2O,MgO
Oxit lưỡng tính Al2O3Al2O3
Axit : HNO3,H2SO4HNO3,H2SO4
Bazo : Ca(OH)2,NaOH,Mg(OH)2,KOH,Fe(OH)2
12
10
9
11
were caught
was bought
was given
was put up
is allowed