x2 |
a2 |
y2 |
b2 |
A.(0,
| B.[
| C.(0,
| D.[
|
x2 |
a2 |
y2 |
b2 |
y2 |
b2 |
y2 |
b2 |
c2 |
b2 |
-b3 |
c2 |
a4 |
c2 |
-b3 |
c2 |
| ||
2 |
| ||
2 |
3 |
A.30° | B.60° | C.90° | D.120° |
A.相离 | B.内切 |
C.内含 | D.可以内切,也可以内含 |
x2 |
16 |
y2 |
25 |
A.(±4,0) | B.(0,±4) | C.(±3,0) | D.(0,±3) |
x2 |
a2 |
y2 |
b2 |
b2 |
a2 |
A.①②④ | B.①②③ | C.②③④ | D.①④ |
© 2017-2019 超级试练试题库,All Rights Reserved.