诊断颅底骨折最确切的依据是（）.
A.头面部受暴力史
B.眼睑青紫
C.X线片示额骨线形骨折
D.鼻出血
E.脑脊液鼻漏
参考答案：E
Not until he left his home ______ to know how important the family was for him.
A．did he begin
B．had he began
C．he began
D．he had began
绞窄性肠梗阻表现为（）
A.X线可见孤立充气扩大的肠袢
B.腹部扪及压痛性肿块
C.感染性休克
D.腹膜刺激征
E.以上均是
Not until he left his home ______ to know how important the family was for him.