AB |
BC |
CA |
GA |
GB |
GC |
BF |
DC |
AE |
A.3个 | B.2个 | C.1个 | D.0个 |
AB |
BC |
CA |
0 |
GA |
GB |
GC |
GC |
GC |
0 |
BF |
DC |
AE |
1 |
2 |
BA |
AC |
BC |
0 |
AB |
BC |
CA |
GA |
GB |
GC |
BF |
DC |
AE |
a |
b |
a |
b |
b |
A.|2
| B.|2
| C.|2
| D.|2
|
AB |
a |
BC |
b |
AM |
a |
b |
a |
b |
1 |
2 |
a |
3 |
2 |
b |
A.(-2,-1) | B.(-1,2) | C.(-1,0) | D.(-2,1) |
BB1 |
AB |
DA |
A.
| B.
| C.
| D.
|
CD |
A.-
| B.-
| C.
| D.
|
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