有关2x3y2m的精选大全

若单项式2x3y2m与﹣3xny2的差仍是单项式,则m+n的值是(  )A.2                ...
问题详情:若单项式2x3y2m与﹣3xny2的差仍是单项式,则m+n的值是()A.2                          B.3                          C.4                  ...
热门标签