古诗词阅读。
                                                                                                           塞下曲
                                                                                                             李白
                                                                    五月天山雪，无花只有寒。笛中闻折柳，春色未曾看。
                                                                    晓战随金鼓，宵眠抱玉鞍。愿将腰下剑，直为斩楼兰①。
                                                                   【注】①楼兰：这里泛指侵扰西北的敌人。