题目

Journey Back in Time with ScholarsClassical Provence(13days)Journey through the beautiful countryside of Provence，France，with Prof. Ori Z. Soltes. We will visit some of the best-preserved Roman monuments in the world. Our tour also includes a chance to walk in the footsteps of Van Gogh and Gauguin. Fields of flowers, tile-roofed(瓦屋顶)villages and tasty meals enrich this wonderful experience.Southern Spain(15days)Spain has lovely white towns and the scent(芳香)of oranges，but it is also a treasury of ancient remains including the cities left by the Greeks，Romans and Arabs. As we t若函数y=ax+1与y=bx-4的图象都经过点（2，0），求a2001，b2002的值．