注释:①绿绮:琴名。②霜钟:钟声。(1)诗中正面描写蜀僧弹琴的是哪两句?_________________________________________________(2)“客心洗流水”一句有何妙处?请作赏析。_________________________________________________(3)诗歌最后两句中的景物描写有何作用?_________________________________________________