ThesandstormfromnorthwesternChina，packingstrongwindsand...
問題詳情：ThesandstormfromnorthwesternChina，packingstrongwindsandtonsofsand，arrivedinBeijing，TianjinandothernorthernregionsonthisSaturdaymorning，March，the20th2010．affectinganareaof810，000squarekilometerswithap...