防护栅栏的设备管理由（）部门负责，治安管理由铁路公1安1部门负责
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WhatisMichael'sproblem？（）
A. He has difficulty in graduating from high school.
B. He wants to go to university but cant afford it.
C. He cant decide on taking a gap year or going to university.
D. He is not sure what major can help him to get a good job
技术改变一切的同时也给汽车工业带来了变化，在未来的十至二十年间，驾驶将产生颠覆性变化
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