2 |
1 |
2 |
1 |
2 |
A.y1<y2<y3 | B.y1>y2>y3 | C.y1>y3>y2 | D.y3>y1>y2 |
1 |
2 |
1 |
2 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
3 |
2 |
1 |
2 |
1 |
3 |
1 |
3 |
A.两条抛物线关于x轴对称 |
B.两条抛物线关于原点对称 |
C.两条抛物线关于y轴对称 |
D.两条抛物线的交点为原点 |
A.y=-x2+2x | B.y=x2+2x | C.y=-x2-2x | D.y=
|
1 |
4 |
A.-5 | B.(0,-5) | C.(-5,0) | D.(0,-20) |
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