题目列表(包括答案和解析)
| a |
| b |
| 2 |
| a |
| b |
| a |
| a |
| b |
| A、30° | B、45° |
| C、60° | D、75° |
| a |
| b |
| 2 |
| a |
| b |
| a |
| a |
| b |
| π |
| 4 |
| π |
| 4 |
| a |
| b |
| 2 |
| a |
| b |
| a |
| a |
| b |
| A.30° | B.45° | C.60° | D.75° |
| a |
| b |
| a |
| b |
| c |
| a |
| b |
| d |
| a |
| b |
| c |
| d |
| a |
| b |
| a |
| b |
| c |
| a |
| b |
| d |
| a |
| b |
| c |
| d |
| A.-b | B.b | C.-
| D.
|
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