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若D为不等式组http://picflow.koolearn.com/upload/papers/g02/20120626/201206262154585802795.png表示的平面区域,则当http://picflow.koolearn.com/upload/papers/g02/20120626/20120626215458683392.pnghttp://picflow.koolearn.com/upload/papers/g02/20120626/20120626215458795492.png连续变化到1时,动直线http://picflow.koolearn.com/upload/papers/g02/20120626/201206262154589111072.png扫过D中的那部分区域的面积为 

发布时间:2021-07-19

A.http://picflow.koolearn.com/upload/papers/g02/20120626/20120626215459014679.png

B.http://picflow.koolearn.com/upload/papers/g02/20120626/20120626215459125664.png

C.1

D.5

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