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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】离子注入有下面哪种特点：
A.
掺入杂质的浓度可高于该杂质在硅中的固溶度
B.
掺杂可控性好于扩散
C.
工艺方法简单、成本低
D.
与扩散相比离子注入杂质分布横向效应小
【单选题】采集上述血沉标本后,注入容器的先后顺序是
A.
抗凝试管，干燥试管，血培养瓶。
B.
干燥试管，血培养瓶，抗凝试管。
C.
干燥试管，抗凝试管，血培养瓶。
D.
血培养瓶，干燥试管，抗凝试管。
E.
血培养瓶，抗凝试管，干燥试管。