InYemen,youalwaysseeonetypeofvehicleontheroad:thewatert...
問題詳情：InYemen,youalwaysseeonetypeofvehicleontheroad:thewatertruck．TheytravelmountainroadsandcrossdesertstobringYemanisagoodmorevaluablethanoil．Itisonethatonlytherichcanafford,withthesupplyregularlybei...