陈国庆的回答：

少年心

龚晓思的回答：

少年心

找回我自己的回答：

<a href="https://wenwen.sogou.com/login/redirect?url=http%3a%2f%2f202.116.24.99%2f...e2%25f9-%25c9%25d9%25c4%25ea%25d5%25c5%25c8%25fd%25b7%25e1%25c6%25ac%25cd%25b7%25c7%25fa.mp3" target="_blank">http://202.116.24.99/...e2%f9-%c9%d9%c4%ea%d5%c5%c8%fd%b7%e1%c6%ac%cd%b7%c7%fa.mp3</a>  主题曲：少年心     <a href="https://wenwen.sogou.com/login/redirect?url=http%3a%2f%2fwww.qqroom.com%2fmusic%2fuploadfile%2fmusic%2f200607%2f26%2f20060726095718.mp3" target="_blank">http://www.qqroom.com/music/uploadfile/music/200607/26/20060726095718.mp3</a>  片尾曲：谁懂