There are also other types of freight cars including _______________, poisonous goods cars and so on. Special-purpose cars mainly include track scale test cars, track inspection cars, generator cars and so on. 还有其他类型的货车，包括_______________、有毒物品货车等。专用车主要有轨道比例尺试验车、轨道检测车、发电车等。
A、postal car 　邮政车
B、box car箱式车
C、container cars 集装箱车