回力卡环适用于 A．前牙缺失 B．后牙游离缺失 C．后牙非游离缺失 D．间隔缺失 E

The physician inserts a chest tube into a client to treat a pneumothorax. The tube is connected to water-seal drainage. The nurse can prevent chest tube air leaks by

A. keeping the chest drainage system below the level of the chest.
B. keeping the head of the bed slightly elevated.
C. checking and taping all connections.
D. checking patency of the chest tub

骤然跪倒着地发生的髌骨骨折是（）

A．压缩骨折

B．横骨折

C．斜骨折

D．粉碎骨折

E．嵌插骨折

如何理解广义刑法学和狭义刑法学？

位于下颌间隙的淋巴结是（）.

A.颈浅淋巴结

B.颌下淋巴结

C.腹股沟浅淋巴结

D.腮淋巴结

兴奋通过一个突触所需的时间为（）

A.0.1～0.3ms

B.0.3～0.5ms

C.0.5～0.7ms

D.0.7～0.9ms

E.>0.9ms