题目: 某无色混合气体,依次通过浓硫酸和过氧化钠时,气体体积不断减少,最后气体变成红棕色,该混合气体的组成是( )A.N2、NO、NH3 B.NH3、CO2、N2 C.NH3、CO2、NOD.NH3、N2、NO2 答案: 答案:C
题型:选择题 —Why not get your mother a scarf for her birthday? —_______A.Good idea!B.I agree with you.C.No way!D.Not at all. 查看答案