问题
单项选择题
Passage Four
Supposing 1 million leukemia cells were killed after 24 hours of exposure to radio waves, how many healthy cells would be killed under the same condition
A．1.2 million.
B．1.4 million.
C．0.8 million.
D．2 million.
答案
参考答案：C
解析：
[分析]： 数字的找寻和判断。 根据原文相关信息It the Italian study，after 24 hours 20 percent more leukemia cells died than healthy cells... 经过简单推算可知，应有0.8 million的健康细胞被杀死。因此，C项与原文相符，是正确答案。[解题关键] 掌握数字信息，并能够作简单推算。