题目内容：
Absences in 2002 varied little, but in 2003 they rose sharply in July, dropping considerably the next month and staying unchanged in September.参考答案：
答案解析：
单选题：Absences in 2002 varied little, but in 2003 they rose sharpl
- 题目分类：初级
- 题目类型：单选题
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