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1. Scientists have made genetic modifications to cotton to increase its resistance to insect pests. According to farmer’s reports, the amount of insecticide needed per acre to control insect pests was only slightly lower for those who tried the modified seed than for those who did not. Therefore, since the modified seed costs more than ordinary seed with out producing yields of higher market value switching to the modified seed would be unlike to benefit most cotton farmers economically.
Which of the following would it be most useful to know in order to evaluate the argument?
B. Whether the insecticides typically used on ordinary cotton tend to be more expensive than insecticides typically used on other crops.
E Whether most of the farmers who tried the modified seed did so because they had previously had to use exceptionally large quantities of insecticide
答案应该选E吧？如果农夫以前需要使用大量杀虫剂而用了改良种子以后就可以少使用乐，说明用杀虫剂还是有经济效益滴，B中棉花杀虫剂和其它作物杀虫剂的价格对评价ARGUMENT没有意义
2. In response to mounting pubic concern, an airplane manufacturer implemented a program with the well-publicized goal of reducing by half the total yearly amount of hazardous waste generated by its passenger-jet division. When the program began in 1994, the division’s hazardous waste output was 90 pounds per production worker. Last year it was 40 pounds per production worker. Clearly, therefore, charges that the manufacturer’s program has not met its goal are false.
Which of the following is an assumption on which the argument depends?
B. At least as many passenger jets were produced by the division last year as had been produced in 1994.
E. The number of production workers assigned to the passenger-jet division was not significantly less in 1994 than it was last year.
答案应该是E吧？因为要减少滴是total yearly amount of hazardous waste generated，所以不管有多少JETS产生，只要总量少乐就可以乐，总量=工人数 X 每个工人平均产生的WASTE。
3. Seldom more than 40 feet wide and 12 feet deep, but it ran 363 miles across the rugged wilderness of upstate New York,, the Eric Canal connected the Hudson River at Albany to the Great Lakes at Buffalo, providing the port of New York City with a direct water link to the heartland of the North American Continent.
- Seldom more than 40 feet wide and 12 feet deep, but it ran 363 miles across the rugged wilderness of upstate New York, the Eric Canal connected
- Seldom more than 40 feet wide or 12 feet deep but running 363 miles across the rugged wilderness of upstate New York, the Eric Canal connected
答案应该是B， BUT是表转折滴连词，前后应该是平行结构，A中BUT用得不对，BUT连接的两个句子没有转折关系，改变乐句子滴意思，B中BUT前后连拉滴是THE ERIC CANAL的两个性质，是平行滴，正解，但是B中的OR好象用AND好哦~~
4. Delta products, Inc., has recently switched at least partly from older technologies using fossil fuels to new technologies powered by electricity. The question has been raised whether it can be concluded that for a given level of output, Delta’s operation now causes less fossil fuel to be consumed than it did formerly, The answer, clearly, is yes, since the amount of fossil fuel used to generate the electricity needed to power the new technologies is less than the amount needed to power the older technologies, provided that the level of output is held constant.
In the argument given, the two Boldface portions play which of the following roles?
- The first identifies the content of the conclusion of the argument; the second provides support for that conclusion.
E. Each provides support for the conclusion of the argument.
A肯定不对，不过E好象也不对哦~~THE FIRST只是陈诉了一个客观事实，THE SECOND是支持论点滴~~论点应该是：The question has been raised whether it can be concluded that for a given level of output, Delta’s operation now causes less fossil fuel to be consumed than it did formerly, The answer, clearly, is yes | 
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发表于 2005-10-20 01:32:00
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