单选题：WhathappenedtotheratsaccordingtoDr.Seraliniinhisexperiment?

题目分类：英语六级
题目类型：单选题
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题目内容：

WhathappenedtotheratsaccordingtoDr.Seraliniinhisexperiment? A．Ratsfedwithmodifiedmaizedidn'tdeveloptumours.
B．Ratsfedwithmodifiedmaizeweremorelikelytodeveloptumours.
C．Femaleratsfedwithmodifiedmaizehadlowerdeathrates.
D．Femaleratssufferlesshealthdamagethanthemaleones.

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