4845| 14
|
1千克到底有多重? |
| ||
| ||
| ||
| ||
點評
作者可能也不知道,質(zhì)量是用天平來秤的,就是放月亮上變輕了也是一樣的
| ||
| ||
| ||
小黑屋|手機版|Archiver|機械社區(qū) ( 京ICP備10217105號-1,京ICP證050210號,浙公網(wǎng)安備33038202004372號 )
GMT+8, 2024-9-24 14:22 , Processed in 0.059506 second(s), 16 queries , Gzip On.
Powered by Discuz! X3.4 Licensed
© 2001-2017 Comsenz Inc.