急问 DB上预定火车票座位的问题在填写DB预定信息中遇到三个选项Reservation1、Ticket with seat reservation 4,00 EUR per seat and direction (for max. 2 trains in each direction).2、Seat reservation only (no ticket) 4,00 EUR per seat and direction (for max. 2 trains in each direction).3、Ticket without seat reservation...