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  1. ...of 200000. It killed about 37500 people. radiation killed many more. Japan faced...former Premier Hideki Tojo and 6 others were condemned to hang. The...

    分類:藝術與人文 > 歷史 2005年03月12日

  2. ...9.192631770 x 109) cycles of the radiation produced by the transition between...cesium 133 atom. There are other expressions for the second...minute, 60 minutes in an hour, and 24 hours in a mean solar day...

    分類:藝術與人文 > 歷史 2004年12月16日