a |
b |
c |
a |
b |
c |
a |
b |
c |
A.4 | B.10 | C.4或10 | D.2或
|
a |
b |
c |
2π |
3 |
a |
b |
c |
a |
b |
c |
2π |
3 |
a |
b |
2π |
3 |
a |
c |
b |
c |
2π |
3 |
a |
b |
c |
|
4+4+36-4-12-12 |
e1 |
e2 |
e1 |
e2 |
a |
b |
a |
a |
b |
3 |
a |
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
b |
a |
b |
a |
a |
b |
a |
b |
OA |
OB |
OC |
OA |
OB |
A.
| B.
| C.2 | D.
|
OA |
OB |
A.1 | B.
| C.
| D.
|
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