a |
b |
c |
a |
b |
c |
a |
c |
b |
3 |
a |
a |
b |
A、30° | B、150° |
C、60° | D、120° |
a |
b |
c |
0 |
b |
a |
c |
b |
a |
c |
a |
c |
a |
c |
b |
3 |
a |
a |
a |
c |
a |
c |
a |
c |
b |
a |
c |
a |
b |
a |
a |
c |
a |
b |
c |
0 |
b |
a |
c |
b |
a |
c |
a |
c |
a |
c |
b |
3 |
a |
a |
a |
c |
a |
c |
a |
a |
c |
c |
a |
c |
a |
c |
a |
c |
b |
a |
c |
a |
b |
a |
a |
c |
a |
b |
a |
b |
a |
a |
c |
3 |
a |
a |
b |
a |
1 |
2 |
a |
a |
a |
b |
| ||
2 |
a |
b |
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