CA |
CB |
CA |
CB |
CA |
CB |
π |
3 |
1 |
2 |
CA |
CB |
|
1+1+ 2×
|
3 |
3 |
a |
b |
a |
b |
a |
b |
b |
a |
a |
b |
A.3 | B.
| C.
| D.1 |
a |
b |
a |
b |
a |
b |
a |
b |
A.-
| B.
| C.-1 | D.1 |
AB |
a |
BC |
b |
a |
b |
A.0 | B.2 | C.
| D.2
|
a |
b |
a |
b |
a |
b |
a |
b |
5 |
a |
b |
b |
A.(-4,2) | B.(4,2) | C.(4,-2)或(-4,2) | D.(-4,-2)或(4,2) |
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