SMTP协议属于TCP/IP______层的协议。
参考答案:应用层
He was banned __________ for six months because of drunk driving. [ ]
A. to drink
B. to driving
C. driving
D. from driving
腹膜后脓肿()
A.胰体尾后方低密度影,肾前筋膜增厚
B.肾周间隙增宽积液
C.腰肌旁软组织块影,中间无强化,周围强化明显
D.肾前筋膜前方积液并含有气泡
E.肋腹脂线中断,密度增高