由x2-xy+y2=C确定的隐函数满足的微分方程是( ).
A、<img src="https://static.tiw.cn//s/tiw/p3/UpLoadImage/2013-05-07/672c80c8-193b-4774-ace0-7274c457ed7c.png" width="158" height="19">
B、<img src="https://static.tiw.cn//s/tiw/p3/UpLoadImage/2013-05-07/5b66b0c8-363a-409f-a118-5dacef1e9e7e.png" width="126" height="20">
C、<img src="https://static.tiw.cn//s/tiw/p3/UpLoadImage/2013-05-07/934c06de-40b7-4a9c-82ed-8822a0f138a5.png" width="103" height="19">
D、<img src="https://static.tiw.cn//s/tiw/p3/UpLoadImage/2013-05-07/4cd4f374-e66a-412b-b453-57a5d8c68a2b.png" width="130" height="19">
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