细菌性角膜炎发病的危险因素有（）
A.维生素缺乏
B.长期使用免疫抑制剂
C.干眼症
D.糖尿病
E.角膜接触镜
参考答案：A, B, C, D, E
What a pity! ________joined in the party, I would have met my old friend．
A．lf I have
B．Had I
C．I had
D．Have I
急性胃炎的确诊有赖于
A．上消化道钡餐
B．胃镜检查
C．临床症状
D．上腹部CT
E．消化系B超
