A. 2x+2y B. x+y C.2x-2y D.x-yB

恬恬2020-05-20  6

问题

选项 A. 2x+2yB. x+yC.2x-2yD.x-y

答案B

解析[img]/upload/tiku/131/296708_1.jpg[/img][img]/upload/tiku/131/296708_1_1.jpg[/img]
转载请注明原文地址:https://ti.zuoweng.com/ti/VNnEKKKQ