InYemen,youalwaysseeonetypeofvehicleontheroad:thewatert...
问题详情：InYemen,youalwaysseeonetypeofvehicleontheroad:thewatertruck．TheytravelmountainroadsandcrossdesertstobringYemanisagoodmorevaluablethanoil．Itisonethatonlytherichcanafford,withthesupplyregularlybei...