a |
b |
c |
a |
b |
c |
c |
a |
b |
a |
b |
a |
b |
b |
c |
a |
a |
c |
b |
c |
a |
b |
a |
b |
a |
b |
A.②④ | B.③④ | C.②③ | D.①② |
b |
c |
a |
b |
c |
c |
a |
b |
a |
b |
a |
b |
a |
b |
b |
c |
a |
c |
a |
b |
c |
b |
c |
a |
c |
c |
a |
b |
c |
a |
b |
a |
b |
a |
A.
| B.
| C.-
| D.-
|
OA |
OB |
OP |
QA |
QB |
A.(
| B.(
| C.(
| D.(
|
π |
3 |
OA |
BC |
a |
b |
c |
a |
b |
c |
0 |
b |
a |
c |
a |
b |
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