经师易遇，人师难求。老师，是园丁，修剪枝叶，祖国山川添秀色；老师，是春雨，润育桃李，神州大地尽芳菲。加减乘除，算不尽您做出的贡献；诗词歌赋，也颂不完对您的崇敬。The teacher who imparts knowledge is easy to encounter,but the teacher who imparts both knowledge and morality is hard t