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【单选题】
跨局直通旅客列车每运行一个往返须安排入库检修；单程运行距离在（）及以上的旅客列车，在折返站原则上应安排入库检修。A.
4000 km
B.
3000 km
C.
2000 km
D.
1000 km
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【单选题】The word “flammable” is with the same meaning of.
A.
dangerous
B.
toxic
C.
light
D.
combustible