A.(0,
| B.(0,
| C.(
| D.(
|
x2 |
a2 |
y2 |
b2 |
|BG| |
2 |
BD |
BF |
BF |
2 |
3 |
BD |
2 |
3 |
3 |
2 |
b |
2 |
3 |
2 |
b |
2 |
(
| ||
a2 |
(-
| ||
b2 |
c2 |
a2 |
1 |
3 |
| ||
3 |
| ||
3 |
x2 |
a2 |
y2 |
b2 |
PF1 |
PF2 |
x2 |
a2 |
y2 |
b2 |
2 |
x2 |
4 |
A.
| B.
| C.
| D.
|
x2 |
a2 |
y2 |
b2 |
3 |
x2 |
4 |
y2 |
m2 |
x2 |
m2 |
y2 |
2 |
A.1 | B.-1 | C.±1 | D.不确定 |
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