[多选题]What are the components to a maglev train rail system? ( )U4Y答案窝(daanwo.com)-大学生作业答案及考资分享平台
AA large electrical power sourceU4Y答案窝(daanwo.com)-大学生作业答案及考资分享平台
BMetal coils lining a guideway or trackU4Y答案窝(daanwo.com)-大学生作业答案及考资分享平台
CA cushion of airU4Y答案窝(daanwo.com)-大学生作业答案及考资分享平台
DLarge guidance magnets attached to the underside of the train