AstherailroadsandthehighwaysshapedtheAmericanWestinthep...
问题详情：AstherailroadsandthehighwaysshapedtheAmericanWestinthepastcenturies,anewelectricalgenerating（发电）andtransmission（输送）systemforthe21stcenturywillleavealastingmarkontheWest,forbetterorworse.Muchof...