题目列表(包括答案和解析)
| a |
| b |
| a |
| b |
| a |
| b |
| b |
| a |
| a |
| b |
| a |
| b |
| x1 |
| x2 |
| y1 |
| y2 |
| a |
| b |
| a |
| b |
| a |
| b |
| x1 |
| x2 |
| y1 |
| y2 |
| a |
| b |
| a |
| b |
| a |
| b |
| a |
| b |
| b |
| a |
| a |
| b |
| a |
| b |
| x1 |
| x2 |
| y1 |
| y2 |
| a |
| b |
| a |
| b |
| A.1个 | B.2个 | C.3个 | D.4个 |
| A、-4p2 | B、4p2 | C、-2p2 | D、2p2 |
| A.-4p2 | B.4p2 | C.-2p2 | D.2p2 |
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