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【单选题】
道岔编号闪表示（）故障。A.
无显示
B.
物理占用
C.
进路道岔有储存的kick-off控制故障
D.
挤岔
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【简答题】Look at the photo of my family. The man in black is my father. The woman(女人) in green is my mother. They are teachers. My father is an English teacher, and my mother is a math(数学) teacher. The girl in...
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