为兄好；谢谢鼓励。写科普不容易，很难掌握深浅；试试啦：）

来源: dongfangshaoer 于 2010-07-24 11:31:35 [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.