单纯小肠梗阻的典型X线表现。
参考答案:
①梗阻以上肠曲扩大积气积液。②立位或侧卧位水平投照时扩大肠曲内有较宽大的液平。③梗阻以下肠曲萎陷无气或只有少量气体。
—Could you tell me _____?
— I'm sorry. The traffic was too heavy. [ ]
A. why were you late for the meeting
B. why you were late for the meeting
C. when you were late for the meeting
角膜基质炎最常见的病因为
A.结核
B.单纯疱疹
C.先天性梅毒
D.带状疱疹