Based on the information from the authority, there is no evidence to suggest that nuclear events in

Fukushima, Japan ______any health impact on us.     [      ]

A. will have  

B. should have  

C. had  

D. would have

在病例对照研究中，由于对病例和对照的询问方式和态度不同所造成的偏倚是（）。

A.回忆偏倚

B.暴露怀疑偏倚

C.测量偏倚

D.诊断怀疑偏倚

E.以上均不正确