A.
| B.
| C.
| D.无法确定 |
y |
x+a |
y |
x-a |
y 2 |
x2-a2 |
π |
2 |
π |
2 |
π |
12 |
x2 |
a2 |
y2 |
b2 |
A.4a | B.4a-m | C.4a+2m | D.4a-2m |
A.
| B.
| C.2
| D.3 |
x2 |
a2 |
y2 |
b2 |
5 |
4 |
A.±
| B.±
| C.±
| D.±
|
x2 |
25 |
y2 |
11 |
sinA-sinC |
sinB |
x2 |
a2 |
y2 |
b2 |
F1A |
AB |
A.3x±y=0 | B.x±3y=0 | C.2x±3y=0 | D.3x±2y=0 |
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