单选题:Which of the following words contains a triphthong? 题目分类:学科知识与教学能力 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: Which of the following words contains a triphthong? A.low B.tower C.boy D.year 参考答案: 答案解析: