A.y=3x2或y=-3x2 | B.y=3x2 |
C.y2=-9x或y=3x2 | D.y=-3x2或y2=9x |
1 |
6 |
1 |
3 |
9 |
2 |
A.(-2,3) | B.(-2,3) | C.(-2,-3) | D.(2,-3) |
A.2x-y+1=0 | B.2x+y+1=0 | C.2x-y-1=0 | D.2x+y-1=0 |
A.(2,-3)、r=13 | B.(2,-3)、r=
| C.(2,3)、r=
| D.(-2,3)、r=13 |
A.圆心P(1,3),半径r=10 | B.圆心P(1,3),半径r=
| ||
C.圆心P(1,-3),半径r=10 | D.圆心P(1,-3),半径r=
|
A.(-2,0),2 | B.(-2,0),4 | C.(2,0),2 | D.(2,0),4 |
© 2017-2019 超级试练试题库,All Rights Reserved.