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【单选题】
捣镐手工捣固时，第二排镐应落在距轨枕边约（）处，混凝土轨枕略远一点，避免打伤轨枕。
A.
5～10mm
B.
10～20mm
C.
20～30mm
D.
30～40mm
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】第二篇 Sleep We all know that the normal human daily cycle of activity is of some 7 - 8 hours’ sleep alternating with some 16 - 17 hours’ wakefulness and that, broadly speaking, the sleep n...
A.
people hate the inconvenience of working on night shifts.
B.
your life is disturbed by changing from day to night routines and back.
C.
not all industries work at the same hours.
D.
it is difficult to find a corps of good night workers.