围成,则[img src="https://img.haodaxue.net/uploadimg/image/20200605/20200605182913_95972.png" alt="" />">
首页 > 学历类 > 研究生考试 > 考研 > 考研数学二 > 设区域D由曲线[img src="https://img.haodaxue.net/uploadimg/image/20200605/20200605182847_66681.png" alt="" />围成,则[img src="https://img.haodaxue.net/uploadimg/image/20200605/20200605182913_95972.png" alt="" />

设区域D由曲线[img src="https://img.haodaxue.net/uploadimg/image/20200605/20200605182847_66681.png" alt="" />围成,则[img src="https://img.haodaxue.net/uploadimg/image/20200605/20200605182913_95972.png" alt="" />

A.π
B.2
C.-2
D.-π
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正确答案: D
答案分析:img src="https://img.haodaxue.net/uploadimg/image/20200605/20200605183355_42926.png" alt="" />
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