题目内容
点M (2 ,-1)向上平移2个单位长度得到的点的坐标是
[ ]
A.(2,0)
B.(2,1)
C.(2,2)
D.(2,-3)
B.(2,1)
C.(2,2)
D.(2,-3)
B
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题目内容
| k |
| x |
| A、y1<0<y2 |
| B、y3<0<y1 |
| C、y2<y1<y3 |
| D、y3<y1<y2 |