题目内容：
设D是由y＝x²和y＝x所围成的平面图形，其面积A＝（ ）
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答案解析：
单选题：设D是由y＝x²和y＝x所围成的平面图形，其面积A＝（ ）
- 题目分类：高等数学(一)微积分
- 题目类型：单选题
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