α |
β |
α |
β |
α |
β |
α |
β |
A.-
| B.
| C.
| D.
|
α |
β |
α |
β |
α |
β |
α |
α |
β |
β |
α |
β |
1 |
3 |
a |
b |
c |
a |
b |
c |
a |
b |
c |
a |
a |
b |
a |
b |
a |
a |
b |
13 |
b |
A.5 | B.4 | C.3 | D.1 |
a |
b |
a |
b |
a |
b |
3 |
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
a |
2 |
b |
a |
b |
a |
b |
a |
b |
b |
a |
c |
a |
b |
c |
a |
a |
b |
A.30° | B.60° | C.120° | D.150° |
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