谢谢分享。密度是质量除以体积。你这个办法完全没有测体积啊。

来源: thankful 于 2018-12-27 06:37:56 [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.

Change Ad Consent