患儿急诊手术的指征是
A．血常规异常
B．病儿年龄小病变进展快
C．全腹压痛反跳痛肌紧张
D．病史2天
E．高热腹痛呕吐
参考答案：C
—How long ______ the meeting ______?
—For about ten minutes. [ ]
A. did; begin
B. has; begun
C. has; been on
D. has; been
唐朝，长沙人欧阳询、欧阳通父子书法闻名于世，时称什么体？
