对于抛物线
[
]|
A .(-∞,0) |
B .(-∞,2] |
|
C .[0,2] |
D .(0,2) |
椭圆
[
]|
A .7倍 |
B .5倍 |
|
C .4倍 |
D .3倍 |
椭圆
[
]|
A . |
B . |
C . |
D . |
对于抛物线
[
]|
A .(-∞,0) |
B .(-∞,2] |
|
C .[0,2] |
D .(0,2) |
椭圆
[
]|
A .7倍 |
B .5倍 |
|
C .4倍 |
D .3倍 |
椭圆
[
]|
A . |
B . |
C . |
D . |