Among the following statements, which are true ones?
A.In transit terms, a "car" means a single rail vehicle.
B.The word "train" comes from a Latin word.
C.The word "train" originally means "to connect".
D.In transit terms, a train means multiple rail cars connected together.
正确答案：In transit terms, a "car" means a single rail vehicle.；The word "train" comes from a Latin word. ；In transit terms, a train means multiple rail cars connected together.