|
OM |
ON |
A.(0,
| B.(0,
| C.[0,
| D.[
|
|
2 |
OM |
ON |
OM |
ON |
ON |
OM |
ON |
|OM| |
2 |
2 |
OM |
ON |
| ||
2
|
1 |
2 |
OM |
ON |
π |
6 |
a |
b |
a |
b |
a |
a |
b |
b |
a |
b |
a |
b |
a |
b |
a |
a |
b |
a |
b |
A.
| B.
| C.
| D.
|
a |
b |
a |
b |
3 |
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
A.45° | B.60° | C.135° | D.120° |
a |
b |
a |
b |
b |
a |
b |
A.30° | B.60° | C.150° | D.120° |
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