- 問題詳情:ThesandstormfromnorthwesternChina,packingstrongwindsandtonsofsand,arrivedinBeijing,TianjinandothernorthernregionsonthisSaturdaymorning,March,the20th2010.affectinganareaof810,000squarekilometerswithapopulationof250million.Inthelast35hourstill11a.m.Satur...
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