OP |
1 |
3 |
OA |
OB |
OC |
A.内心 | B.垂心 | C.外心 | D.重心 |
OD |
OA |
OB |
OP |
1 |
3 |
OA |
OB |
OC |
OP |
1 |
3 |
OD |
OC |
2(1-λ) |
3 |
OD |
1+2λ |
3 |
OC |
2(1-λ) |
3 |
1+2λ |
3 |
A.y2=8x | B.y2=4x | C.y=
| D.y=8x2 |
y2 |
4 |
y2 |
4 |
16 |
a |
A.椭圆 | B.线段 | C.不存在 | D.椭圆或线段 |
A..双曲线的一支 | B..椭圆 |
C.抛物线 | D.射线 |
PA |
PB |
© 2017-2019 超级试练试题库,All Rights Reserved.