OG11-64提问

angelhuqi

64 Red blood cells in which the malarial-fever parasite resides are eliminated from a person's body after 120 days. Because the parasite cannot travel to a new generation of red blood cells, any fever that develops in a person more than 120 days after that person has moved to a malaria-free region is not due to the malarial parasite.

Which of the following, if true, most seriously weakens the conclusion above?

(A)          The fever caused by the malarial parasite may resemble the fever caused by flu viruses.

(B)          The anopheles mosquito, which is the principal insect carrier of the malarial parasite, has been eradicated in many parts of the world.

(C)         Many malarial symptoms other than the fever, which can be suppressed with antimalarial medication, can reappear within 120 days after the medication is discontinued.

(D)         In some cases, the parasite that causes malarial fever travels to cells of the spleen, which are less frequently eliminated from a person's body than are red blood cells.

(E)          In any region infested with malaria-carrying mosquitoes, there are individuals who appear to be immune to malaria.

削弱题  前提C: 寄生虫所在的红细胞120天就死了, 原因A: 寄生虫不能换新的红细胞, 结论B 120天后的发烧不是几声虫引起的.

答案是E    削弱方法:原因A 不成立, 或者说有非A , 

请问我的分析正确吗?

wycg

同意.

wishful_way

can somebody explain this question further in details...still confused

youdoudou

the answer is d not e

kevin070707

LZ分析应该没有问题， A->B。

不过这样想会不会更好，red cell not cell, so A1->B.

To weaken B, I could say A2 can't be eliminated after 120 days. In this way, B can't be concluded.

Like D does. 他因削弱。

欢迎拍砖。

Hendy

你就想啊，那就是超过120天的高烧是因为疟疾产生的，也就是寄生虫还是引起了高烧对不对？
既然在红细胞里的寄生虫是可以排除的，那寄生虫会不会通过其他方式留下来呢？
然后D不就bingo了么！