题目

下列各组气体中,在通常状况下能共存,并且都能用浓硫酸干燥的是(    ) A.H2、H2S、Cl2       B.N2、O2、NH3 C.SO2、CO2、O2             D.HCl、HBr、HI 答案:C He always asks his father .A. what the future will be likeB.what will the future be likeC.will people have robots at homeD.can people live to be 200 years old
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