a |
b |
c |
A.若
| B.若
| ||||||||||||||||||||
C.若
| D.若λ
|
a |
b |
a |
b |
a |
b |
a |
c |
b |
c |
a |
b |
a |
c |
b |
c |
a |
b |
a |
b |
a |
b |
a |
b |
a |
a |
0 |
AB |
CD |
A.3 | B.2 | C.1 | D.0 |
a |
b |
a |
b |
AB |
BA |
AB |
CD |
A.① | B.② | C.①和③ | D.①和④ |
f1 |
f2 |
f3 |
f4 |
f4 |
f5 |
f5 |
A.(-2,-4) | B.(2,-4) | C.(-4,-2) | D.(-4,2) |
OA |
OB |
OC |
OP |
A.外心 | B.内心 | C.重心 | D.垂心 |
a |
b |
a |
b |
c |
c |
A.(1,0) | B.(0,1) | C.(1,1) | D.(-1,1) |
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