题目

Not only spring but autumn is ______ good time for Wenzhounese to experience ______ nature, especially when sweet osmanthus (桂树) in full blossom.   A. /, the                    B. a, the                            C. the, /                      D. a, / 答案：D 解析: 略点P（3-a，5-a）是第二象限的点，则=________．