高原空气清新，少污染，紫外线强的关系。

来源: tetu45 于 2009-01-10 20:26:37 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.