推荐回答（2个）
1.初雪（班得瑞，强力推荐）；2.雪之梦（班得瑞，强力推荐）；3.月光边境（林海，强力推荐）；4.远方的寂静（林海）；5.迷失（林海）；6.雨的印记（强力推荐）；7.奇异恩典；8.云端的天使（班得瑞）；9.飞行幻想（雅尼）；10.Tear的眼泪；11.Canon In D；12.流动的城市（林海）；13.Childhood… (童年，班得瑞)；14.A woodland…(森林中的一夜，班得瑞)；15.天际；16.茶叶——中国舞（柴可夫斯基）；17.印第安之梦（班得瑞）；18.蓝色的爱；19.暖心（蔷薇少女）；20.Summer（久石让）
都是超好听的纯音乐哦！
我觉得上个回答的朋友说的不太对 班得瑞等等那些都是比较浪漫和抒情或者悲伤的
放在学术上的地方不太好 而且那些音乐在别的地方已经都用烂了。。
我也参加过挑战杯 有规定要背景音乐？这样在表述的时候不会受影响吗？
如果真要的话 可能要稍微轻快些的
Koan的还不错 比较推荐Girl from Heavens 我自己作品集PPt就是用这首 科技感还挺强的
Koan的还有Sakura、Together With Mai On Fourth 、Pearl Island、
One Day In Winter Garden、Lady Of The Coco Flower也还可以，但就没有Girl那首那么好听了
如果要安静点的 黄永灿的不错 用的人不多
像《如诗般宁静》很好听，《白色印记》《香水海》《深深深窗》也还不错
久石让的音乐建议找像Always with me之类比较欢快的（但Summer有点太常见了）
Yiruma的River Flows In You还算比较积极的 不是悲伤
像雨的印记之类他的超级代表作很多人用过就不要一直用了。。
其他的My Soul July也算比较老的了 纯音乐很多的。。也不好一一列举 先这样吧。。
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