a |
b |
3π |
2 |
a |
b |
α |
2 |
π |
3 |
a |
b |
a |
b |
a |
b |
a |
b |
4 |
3 |
1 |
2 |
3π |
2 |
1 |
2 |
4 |
3 |
3π |
2 |
α |
2 |
3π |
4 |
4 |
3 |
α |
2 |
1 |
2 |
α |
2 |
α |
2 |
| ||
5 |
α |
2 |
2
| ||
5 |
α |
2 |
π |
3 |
α |
2 |
π |
3 |
α |
2 |
π |
3 |
2
| ||
5 |
1 |
2 |
| ||
5 |
| ||
2 |
2
| ||||
10 |
A.30°或60° | B.45°或60° | C.30°或150° | D.120°或60° |
π |
4 |
π |
2 |
π |
3 |
a |
3 |
b |
a |
b |
A.2 | B.
| C.-2 | D.-
|
3 |
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