有關xa1y20的精選大全

直線ax+2y1=0與x+(a1)y+2=0平行,則a等於                    A.    ...
問題詳情:直線ax+2y1=0與x+(a1)y+2=0平行,則a等於                    A.                  B.2                 C.1                D.2或1【回...
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