对耳源性脑脓肿的脓肿处理主要有()
A.穿刺抽脓
B.50%葡萄糖和20%甘露醇交替静脉注射
C.脓肿切除
D.切开引流
E.应用糖皮质激素
参考答案:A, C, D
When the audience heard the alarm, they all hurried to they thought was an emergency exit door.
A.what
B.which
C.where
D.who
交流接触器电源有电,但不吸合或者是电源已断开但接触器不断开电路仍有电,是什么原因?如何处理?