题目内容：
A person′s calorie requirements vary______ his life.
A.across B.throughout C.over D.within
参考答案：
答案解析：
选择题：A person′s calorie requirements vary______ his life.A.across B.throu
- 题目分类： 教师招聘(中学)
- 题目类型：选择题
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