来自贾曦的问题
Thereissupposedtobeasafety______whichmakesitimpossiblefortrainstocollide.A)applianceB)accessoryC)machineD)mechanismA和D有什么区别
Thereissupposedtobeasafety______whichmakesitimpossiblefortrainstocollide.A)appliance
B)accessory
C)machine
D)mechanism
A和D有什么区别
1回答
2019-05-01 13:48