啊~学霸,i need you

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啊~学霸,ineedyou啊~学霸,ineedyou 啊~学霸,ineedyou选A,角bcd=30,cd=2,de=2,勾股定理得CE=根3

啊~学霸,i need you
啊~学霸,i need you

 


啊~学霸,i need you
选A,角bcd=30,cd=2,de=2,勾股定理得CE=根3