题目

 — Which do young people prefer, music or sports?— Both. Music is ________ sports.           A. as popular as                    B. not as popular as             C. more popular than              D. less popular than 答案：A下列气体，既不能用排水法收集又不能用浓硫酸干燥的是A. Cl2B. NOC. SO2D. NH3