送交者: pgss 于 2012-06-18, 11:52:50:

回答: 至少有一种情况２公斤木头或许可以浮在一公斤水上 由 alabama 于 2012-06-18, 11:19:41:

• why? (无内容) - alabama (0 bytes) 2012-06-18, 12:05:48 (670062)
  • science is either black or white, "也许没有也许"？ - pgss (16 bytes) 2012-06-18, 18:40:40 (670115)
  • surface tension is something totally different - pgss (77 bytes) 2012-06-18, 18:38:49 (670114)

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