【单选题】完型填空prohibitedX-ray scannersentrancesmetal detectorsgo throughfetch完型填空There are security channels in each station. Security staff are placed at the ____1__ of train stations with equipment like _____...
【简答题】Metrorall (地铁) Each passenger needs a farecard to enter and go out .Up to two children under age five may travel Free with a paying customer . Farecard machines are in every station .Bring small bills...