a |
b |
c |
a |
a |
b |
b |
a |
c |
b |
c |
b |
c |
b |
A.
| B.
| C.
| D.1 |
α |
α |
α |
β |
α |
β |
β |
1 |
2 |
β |
1 |
2 |
γ |
α |
γ |
β |
γ |
1 |
2 |
α |
γ |
β |
γ |
1 |
2 |
3 |
2 |
1 |
2 |
3 |
4 |
y1 |
2 |
| ||||
2 |
3 |
4 |
y1 |
2 |
| ||||
2 |
γ |
x2+y2 |
γ |
(
|
| ||||
2 |
(
|
| ||||
2 |
(
|
| ||||
2 |
(
|
| ||||
2 |
y12+
|
1 |
2 |
α |
OA |
α |
β |
α |
β |
β |
OB |
β |
OC |
γ |
α |
γ |
β |
γ |
OC |
γ |
1 |
2 |
1 |
2 |
a |
b |
a |
b |
π |
2 |
3 |
4 |
AP |
1 |
2 |
AB |
1 |
2 |
AC |
1 |
6 |
BC |
A.△ABC的一边上 | B.△ABC的一顶点处 |
C.△ABC的外部 | D.△ABC的内部 |
AB |
AC |
AB |
A.7 | B.4 | C.3 | D.2 |
OA |
OB |
OC |
a |
A.±
| B.10或0 | C.±5 | D.13或3 |
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