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1、33’ Background: Carl is an incompetent detective. Premise: in the past 3 years, he solved only 1 of the 25 cases that had been assigned to him. Prephrase: to weaken the argument, the only case Carl has solved was the most difficult one for all other detectives in the past 3 years. A
A: solving the case other detectives can not is enough to approve Carl is a competent detective. B: this is irrelevant to the capability of Carl to solve cases. C: the question is to weaken the argument, if working on the same level and being supplied with the same outfit, but with fewer achievements, this will prove Carl’s incompetence. D: in 4 years solved only 1 out of 30 crimes, this shows Carl’s incompetence. E: irrelevant to the question
2、Background: fullerenes, which are exist in nature, formed in fissures of the rare mineral shungite, were first found in the laboratory. Premise: the artificial way of synthesis of fullerenes requires distinctive conditions of temperature and pressure. The discovery could test the hypotheses about the state of Earth’s crust at the time the natural fullerenes were formed. Prephrase: the fullerenes in laboratory were formed accidentally, no one could remember the process. 1’26’’ D A: the argument focuses on the synthesis of fullerenes, not confirming the shungite genuinely contained fullerenes. B: it merely claims the discovery of fullerene in other places, irrelevant to the argument. C: how fullerenes are formed naturally is not the point, irrelevant to the argument. D: if fullerenes are arranged in crystalline structure, the conditions the arrangement will be different as expected, the test then will be invalid, this will undermine the argument. E: if shungite is formed under distinctive conditions, the fullerenes are formed in those conditions either, which is in the same direction with the argument.
3、Background: it costs $11,000 to treat an elderly person for injuries resulting from a fall. Premise: a new therapeutic program can significantly reduce an elderly person’s chance to fall. Conclusion: the program will cost $12,500 and thus can not be justified. Prephrase: those elderly person rarely fall after they participate in the program.
A: the comparison among those who followed the program is irrelevant to the argument. B: the comparison of living environments is irrelevant. C: if the medication is counted to the costs of emergency program, the costs of therapeutic program will be much lower compared with that of emergency program, this is the right answer to undermine the argument. D: the argument is about the costs of 2 programs, not the outcomes of them, irrelevant. E: how the cost of therapeutic program consists is irrelevant
4、Background: an extended family a group of voles consists often includes 2 or 3 litters. Premise: the size of the group of voles varies seasonally, large from late autumn through winter, small from spring through early autumn. Conclusion: the seasonal variation in group size has much to do with the variation in mortality among young voles. Prephrase: in the season when the mortality of young voles is high, voles consist of large group to protect them, in the season when the mortality is low, small group is enough to them. 50’’ E
A: irrelevant to the argument B: the argument is about the relation between variation in group size of vole and that in morality of young voles, not the variation in population. C: not consistent with the argument. D: merely give the information, irrelevant. E: as a major predator of voles, when snakes are active from spring through early autumn, the morality of young voles rises, and during this period, voles live in small group, this supports the argument.
5、40’’ Background: many dolphins living in the sea area near a beach get half of their food each day from the feeding program. Premise: the adult dolphins are healthy, but their offspring have a shorter life than that of dolphins feed exclusively in the wild. Prephrase: the quality of the adult dolphins which get feeded in the program degrade dramatically, which causes serious influence to their offsprings. 1’08’’ E
A: with the logic in the option, the offspring feeded in the program should be more safer, the life expectancy should be longer, which weaken the argument. B: the argument concerns the offspring, not their mathers C: similar food can not explain the low life expectancy of the offspring. D: similar living situation can not explain the low life expectancy of the offspring E: since adult dophins are feed, they spent less time to teach the offspring how to live in the wild, then the offspring will not fit to the wild environment, which is harsh for them to live. |
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