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Tiger beetles are such fast runners that they can capture virtually any non?ying insect. However, when running toward an insect, a tiger beetle will intermittently stop and then, a moment later, resume its attack. Perhaps the beetles cannot maintain their pace and must pause for a moment’ but an alternative hypothesis is that while running, tiger beetles are unable to adequately process the resulting rapidly changing visual information and so quickly go blind and stop.Which of the following, if discovered in experiments using arti?cially moved prey insects, would support one of the two hypotheses and undermine the other?(A)When a prey insect is moved directly toward a beetle that has been chasing it, the beetle immediately stops and runs away without its usual intermittent stopping.(B)In pursuing a swerving insect, a beetle alters its course while running and its pauses become more frequent as the chase progresses.(C)In pursuing a moving insect, a beetle usually responds immediately to changes in the insect’s direction, and it pauses equally frequently whether the chase is up or down an incline.(D)If, when a beetle pauses, it has not gained on the insect it is pursuing, the beetle generally ends its pursuit.(E)The faster a beetle pursues an insect ?eeing directly away from it, the more frequently the beetle stops.Answer:B, 记得有一道也是说甲虫的题，好像题目是一致的但选项不同，这道题实在困惑B和C，尤其是看到答案解释B削弱第一个加强了第二个…..30A physically active lifestyle has been shown to help increase longevity. In the Wistar region of Bellaria, the average age at death is considerably higher than in any other part of the country. Wistar is the only mountainous part of Bellaria. A mountainous terrain makes even such basic activities as walking
it essentially imposes a physically active lifestyle on people. Clearly, this circumstance explains the long lives of people in Wistar.Which of the following, if true, most seriously weakens the argument?(A)In Bellaria all medical expenses are paid by the government, so that personal income does not affect the quality of health care a person receives.(B)The Wistar region is one of Bellaria’s least populated regions.(C)Many people who live in the Wistar region have moved there in middle age or upon retirement.(D)The many opportunities for hiking, skiing, and other outdoor activities that Wistar’s mountains offer make it a favorite destination for vacationing Bellarians.(E)Per capita spending on recreational activities is no higher in Wistar than it is in other regions of BellariaAnswer:C 不理解。。。。只能小时候形成的才叫lifestyle?
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第一题，假设是究竟是因为速度太快了所以要休息一下呢，还是速度太快了看不见B 经常换路线，那么就不是瞎子，瞎子都是走直线的；速度越快挺得越多，证明速度太快要休息一下。因为跟不上那个PACE了。灭一顶一C被追的转方向了它会转变方向，证明不瞎，停顿时间一样无论目标是向上呢还是向下。这个似乎不能证明任何东西。。。第二题C说都是退休了才去那个地方的，证明那里人的年龄基数本来就高了么。就不可能有几岁就死掉的人了。就像你成绩取平均一样，一门分数很低是不是很拉分啊。
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楼上说的有理，尤其是第二题，一说我明白了很多。但是请教第二题的A答案？医疗好为什么不能weaken?我认为如果医疗好，就与active lifestyle没太多关系了？
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谢谢楼上的朋友，但我还是不明白第二题A为什么不能削弱？因为政府在医疗上有保障了，所以人民平均寿命延长了也很合理啊？？？
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我是这么理解的。问题问的是moset seriously weaken：A，确实可以说医疗有保障“有可能”提高寿命，但是这个前提是需要继续加入个人假设的。不如C，直接就可以削弱了。而A如果削弱需要更多的信息进行补充，而补充的同时又加入了可以被weaken的假设。比如说，虽然医疗好了，但是住在那里的人容易死于非命啊，或者也可以说很多住在那里的人生的病是不能被目前的医疗治愈的。所以A为若选项。in conclusion，最强的削弱也是最直接的削弱个人之见
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我觉得医疗好与活的时间长是需要进一步推理的啊 但是结论中并没有给出任何关于医疗可以延长寿命的推理啊 难道医疗好一点活的时间长就么？？
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我是这么理解的。问题问的是moset seriously weaken：A，确实可以说医疗有保障“有可能”提高寿命，但是这个前提是需要继续加入个人假设的。不如C，直接就可以削弱了。而A如果削弱需要更多的信息进行补充，而补充的同时又加入了可以被weaken的假设。比如说，虽然医疗好了，但是住在那里的人容易死于非命啊，或者也可以说很多住在那里的人生的病是不能被目前的医疗治愈的。所以A为若选项。in conclusion，最强的削弱也是最直接的削弱个人之见-- by 会员 bonnie0715 ( 21:15:25)
还是不太明白啊？OG的解释说A是无关选项，可是按你的意思就是有关了？怎么叫还需要加入个人假设？个人觉得那样反倒有问题了，因为加入了其他无关的信息啊~况且记得以前NN说过，逻辑中的most没有意义，无论加强削弱就只有一个选项，不存在程度强弱的问题...补充问一下，是不是OG上也有解释不对呢？别打我.....越看越觉得OG又问题
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对于那个A，说B的地方的医疗好，可能其他 地方也一样好，这是一个无关痛庠的说法。因为没能突出B特有的特点来削弱或支持结论。
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A说的是B全境医疗都好，不是说B境内只有W医疗好，非W的地方不好。所以没有用。
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谢谢各位，终于明白了
所属分类: GMAT考试
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