小女感激不尽！作者: audrey007 时间: 2011-3-24 18:18
60. 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. 重新附上题目, 大家分享下自己的见解把~作者: longyan009 时间: 2011-3-24 18:25
此题狒狒的讲课里面讲了的，新东方的网络课程里面作者: 小安安要乖 时间: 2011-3-24 19:07
d项说明了一种可能性，即血红细胞进入其他路径从而导致虐疾 e没有从原文的因果来说明啊
再把原文的推理说一遍，因为淋巴液不能从血红细胞中传递过去，所以虐疾淋巴液不能在人体的血红细胞中存活120天，所以120天后都是其他因素引起的发烧， 这是一个顺的思维链，你只要把其中一个环节打破就可以了，d就是打破了它的前提作者: cecilia422 时间: 2013-2-22 14:26
用D选项中的一个some来排除，真心觉得这种方法太冒险了。。 看结论：any fever that develops in a person more than 120 days 就说超过120天的发烧就和malarialparasite没有关系了，所以削弱的时候，只要能说明发烧和malarialparasite就行啦~! 这不就是D项说的嘛，它通过其他途径传染，也是传染阿