力学常识告诉我们强度一下子增加十倍是不可能的

来源: 89501200 于 2010-09-08 12:47:04 [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.