单选题:Moreresearch should be done on the experiences of__________ 题目分类:卫生类 题目类型:单选题 号外号外:注册会员即送体验阅读点! 题目内容: Moreresearch should be done on the experiences of__________ A.ingood health B.inthe past C.inthe wrong D.theold man E.amiddle—aged man F.ayoung man 参考答案:【答案仅供学习,请勿对照自行用药等】 答案解析: