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

在虚拟存储器中，当程序正在执行时，由( )完成地址转换。

A．程序员

B．编译器

C．操作系统

D．以上都可以