A.
| B.
| C.
| D.
|
AA1 |
c |
AB |
a |
AC |
b |
a |
b |
1 |
2 |
b |
c |
1 |
2 |
a |
c |
1 |
2 |
AB1 |
a |
c |
BC1 |
b |
a |
c |
AB1 |
BC1 |
a |
c |
b |
a |
c |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
AB1 |
(
|
|
1+1+1 |
3 |
BC1 |
(
|
1+1+1-1+1-1 |
2 |
AB1 |
BC1 |
1 | ||||
|
| ||
6 |
| ||
6 |
A.30° | B.45° | C.60° | D.90° |
A.
| B.0 | C.
| D.
|
A.0°<θ<90° | B.0°<θ<180° | C.0°<θ≤90° | D.0°≤θ<90° |
A.90° | B.45° | C.60° | D.30° |
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