a |
e1 |
e2 |
b |
e1 |
e2 |
e1 |
e2 |
a |
b |
e1 |
e2 |
e1 |
e2 |
e1 |
e2 |
|
|
OA |
a |
OB |
b |
OA |
OB |
a |
b |
OC |
OC |
6 |
5 |
e |
e |
AB |
e1 |
e2 |
BC |
e1 |
e2 |
CD |
e1 |
e2 |
a |
b |
c |
a |
b |
c |
a |
b |
a |
b |
OA |
OB |
3 |
OA |
OB |
OC |
OA |
OB |
m |
n |
A.
| B.3 | C.
| D.
|
a |
b |
m |
2 |
a |
b |
λ |
m |
A.[-6,8] | B.[4,8] | C.[-6,1] | D.(4,8] |
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