发颐与痄腮不同点有
A．张口困难B．部位不同C．疼痛剧烈D．寒战高热E．不会化脓
参考答案：E
29. ______ in the sports world, a sportsman needs to train constantly to keep himself in best condition.
A．Survive
B．Surviving
C．To survive
D．Survived
如果左、右手电极反接记录心电图。
记录的Ⅲ导联心电图相当于实际心电图的
A．Ⅱ导联 B．Ⅰ导联C．aVR导联 D．aVL导联E．aVF导联
