題目列表(包括答案和解析)
| v |
| a |
| b |
| a |
| b |
| OA |
| OB |
| OC |
| 0 |
| a |
| b |
| c |
| a |
| b |
| c |
| a |
| b |
| c |
| 3 |
| a |
| 3 |
| b |
| a |
| b |
| π |
| 3 |
| a |
| b |
| a |
| b |
| a |
| b |
| a |
| b |
| a |
| b |
| a |
| b |
| a |
. |
| b |
| a |
. |
| b |
| a |
| α+β |
| 2 |
| α-β |
| 2 |
| b |
| α+β |
| 2 |
| α-β |
| 2 |
| 2π |
| 3 |
| a |
| b |
| a |
| b |
| 5 |
| 2 |
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