GWD31 1-19求教

A certain tropical island received food donations in the form of powdered milk for distribution to its poorest residents, who were thought to be malnourished.  Subsequently, the rate of liver cancers among those islanders increased sharply.  The donated milk was probably to blame: recent laboratory research on rats has shown that rats briefly exposed to the substances aflatoxin tend to develop liver cancer when fed casein, a milk protein.  This result is relevant because _______.

1. in the tropics, peanuts, a staple of these island residents, support a mold growth that produces aflatoxin
2. the liver is more sensitive to carcinogens, of which aflatoxin may be one, than most other bodily organs
3. casein is not the only protein contained in milk

4. powdered milk is the most appropriate form in which to send milk to a tropical destination
5. the people who were given the donated milk had been screened for their ability to digest milk

答案是A    为什么?      this result is relevant到底是什么意思?

这个热带小岛的人得肺癌应该归咎于那些捐赠的牛奶.

this result is relevant大概是"这个结论有一定正确性的"意思吧?呵呵,语言功底本身也比较烂.

这道题实际上是一个support题,支持说明这些人得癌是因为牛奶.文章已经明确指出当aflatoxin(词霸下发现是个很诡异的东东:黄曲酶毒素...顿感药理学没认真学)遇到牛奶中的casein时就会导致癌症.现在有了牛奶,就差那个黄曲**. A 说,在热带地区,花生是他们的主食,而花生会滋生黄曲***.所以这两个东东相遇了,于是就有了后来的癌.而C,我觉得是无关信息.

个人观点.

请大家及时指正

多谢楼上指点,

看来我犯了一个逻辑错误,我读题的时候以为牛奶中的casein含有aflation,而仅仅是aflation这一种物质导致肝癌.其实是两个物质共同作用产生肝癌

还是阅读不过关啊