题干
单项式﹣
的系数是____，次数是____；多项式x3y﹣x2y3﹣1﹣y2x的次数是____．
| x |
| y |
| 2 |
| 5 |
答案(点此获取答案解析）
-
,3,5
| 1 |
| 5 |
rthquake in Yushu ,________the students to return to their classrooms.
