题目

— I don’t think I will win a lottery (彩票) of 5,000,000 dollars in all my life.     —Well, ____ .Everything can happen.     A.you can never tell     B.you’re kidding     C.what you say     D.you made it 答案：  A 解析:    you can never tell说不定，谁知道呢。you’re kidding你在开玩笑吧；you made it你做到了。8．已知酸、碱、盐和金属氧化物都是电解质，下列物质中不属于电解质的是（　　）A．氢氧化钠B．氧化钾C．硫酸钡D．二氧化硫