Itiseasiertofloatintheoceanthanitistofloatinaswimmingpo...
问题详情：Itiseasiertofloatintheoceanthanitistofloatinaswimmingpool.Doyouknowwhy?Oceanwaterisfullofsalt（盐）—andsaltwatercanholdup（支撑）moreweightthanfreshwater.（淡水）Seeforyourself!YouWillNeed:●3cupsofwarmw...