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【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.
【多选题】数控系统中指令G40、G41、G42含义分别是 __________、__________、 __________
A.
取消刀尖半径补偿
B.
建立刀尖半径左补偿
C.
建立刀尖半径右补偿
D.
直线插补
【单选题】“六艺”在中国古代有二种含义，其中指“才能”的“六艺”是：
A.
礼、乐、射、御、书、诗
B.
礼、乐、射、御、书、数
C.
诗、书、礼、乐、易、射
D.
诗、书、礼、乐、易、数