欲进行吸烟与肺癌的病例对照研究,以下不能作为对照的是()
A.胃病病人
B.支气管炎病人
C.意外损伤病人
D.肠道传染病病人
E.眼病病人
参考答案:B
They are letting us use their computers, and _____ we are giving them the results of our research. [ ]
A. in turn
B. in theory
C. in return
D. in general
24小时尿量超过多少为多尿()
A.2000ml
B.2500ml
C.3000ml
D.3500ml
E.4000ml