Inthe19thcentury,trainswerethebestwaytotravellongdistan...
问题详情：Inthe19thcentury,trainswerethebestwaytotravellongdistances(距离)overnswerefastandconvenient.Inthe20thcentury,airplanesreplacedtrainsforlong-distancetravel.Today,however,high-speedtrainsareattr...