孔板的开孔直径理应在四个大致相等的角度上测量,并求出其平均值,要求各个单测值与平均值之差在()范围之内。
A.0.02%
B.0.03%
C.0.05%
参考答案:C
-I hope you don't mind my pointing out your mistakes.
- . [ ]
A. Not at all
B. You're welcome
C. Of course
D. It's a pleasure
耳源性颅内并发症有()
A.脑膜炎
B.迷路炎
C.脑脓肿
D.面瘫
E.癫痫