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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.
【单选题】关于血友病儿童的口腔治疗原则，叙述错误的是（）
A.
行下颌阻滞或上牙槽阻滞，凝血因子浓度应达到50％水平
B.
可以在局部麻醉下行活髓切断术或牙髓摘除术
C.
乳牙正常脱落通常不会导致出血
D.
可行洁治术
E.
可行正畸治疗