上述病例急诊处理应首先考虑
A．肾造瘘术B．输尿管切开取石术C．输尿管导管套石术D．输尿管插管引流术E．体外冲击波碎石术
参考答案：D
Go on ________ the other exercise after you have finished this one. [ ]
A. to do
B. doing
C. with
D. to be doing
用来发送邮件的协议是（）
A、SNMP
B、SMTP
C、POP3
D、IMAP
