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A.消除H2SO4厂尾气污染 SO2+2NH3+H2O(NH4)2SO3
B.消除硝酸厂尾气氮氧化物污染 NO+NO2+2NaOH2NaNO2+H2O
C.工业上制CuSO4 2Cu+O22CuO,CuO+H2SO4CuSO4+H2O
D.乙炔水化法制乙醛 CHCH+H2OCH3CHO