慢性胰腺炎典型病症表现是
A．上腹疼痛
B．胰腺钙化
C．假性囊肿
D．糖尿病
E．脂肪泻
参考答案：A,B,C,D,E
Tom said he to Guangzhou.
A．never went
B．had never been
C．has never gone
D．has never been
什么是电话网的等级结构？
