i |
j |
a |
i |
j |
b |
i |
j |
a |
b |
i |
j |
i |
i |
j |
j |
i |
j |
a |
i |
j |
b |
i |
j |
a |
b |
|
a |
b |
i |
j |
i |
j |
1 |
2 |
1 |
2 |
1 |
2 |
a |
b |
a |
b |
a |
a |
b |
a |
b |
a |
π |
2 |
b |
a |
b |
A.φ | B.
| C.ϕ-
| D.
|
a |
b |
a |
b |
a |
b |
A.
| B.
| C.
| D.
|
. |
a |
b |
a |
b |
2 |
a |
a |
b |
. |
a |
b |
A.30° | B.45° | C.75° | D.135° |
a |
b |
a |
b |
a |
b |
a |
b |
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