还有问题，看你买了很多材料，感觉成本不会低，是这样吗？你有计算过成本吗？

来源: 蓝藻于 2010-01-11 18:53:07 [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.