耳膜损伤之局部特征为()
A.耳道内常有血迹或血痂
B.鼓膜大穿孔
C.鼓膜圆形规则小穿孔
D.鼓膜不规则之小穿孔
E.穿孔边缘常附有血迹
参考答案:A, D, E
SUPERCLAUS99工艺与SUPERCLAUS99.5工艺最大的区别在什么地方?
The details of any language system is passed on from one generation to the next through (), rather than by instinct.
A.learning
B.teaching
C.books
D.both A and B