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本帖最后由 misir 于 2010-2-2 23:27 编辑
0202:
221The following appeared in the editorial section of a student newspaper.
"In a recent survey, most students who were studying beginning Russian gave higher course-evaluation ratings to classes taught by non-native Russian speakers than to classes taught by native Russian speakers. The reason that the non-native speakers were better teachers of Russian is easy to see: the non-native speakers learned Russian later in life themselves, and so they have a better understanding of how the language can be taught effectively. Therefore, in order to improve instruction for all languages and also save money, our university should hire non-native speakers as language instructors instead of trying to find and recruit native speakers."
1.The higher course-evaluation ratings don’t mean that the non-native speakers are better teaching Russian. Maybe the non-native teachers leave less homework to students, or more attractive than the native ones.
2.even assuming that non-native speakers are better teachers, the author cannot assert that hire them can improve instruction for all languages. Maybe it can only apply to Russian, not the other languages.
3.even assuming that non-native speakers can improve all languages, there is no evidence that it will save money. Non-native speakers may ask a higher wage when they realize that they are better teachers which is requided.
12The following appeared in a memo from a vice president of Alta Manufacturing.
"During the past year, Alta Manufacturing had thirty percent more on-the-job accidents than nearby Panoply Industries, where the [url=]work shifts[/url][s1] are one hour shorter than ours. Experts believe that a significant contributing factor in many on-the-job accidents is fatigue and sleep deprivation among workers. Therefore, to reduce the number of on-the-job accidents at Alta and thereby increase productivity, we should shorten each of our three work shifts by one hour so that our employees will get adequate amounts of sleep."
1.it is not only the fatigue and sleep deprivation that cause the on-the-job accidents. Maybe there exist other problems, like the facilities are too old to work normally, or the workers themselves are not qualified to operate the machines.
2.even assuming that fatigue and sleep deprivation are the primary causes, the author cannot assert that the work shifts is not properly. Maybe the work shift itself is reasonable, while the workers can not make proper use of time, for instance some of them use it to gamble.
3.even assuming that the workers can use their free time in acceptable way, there is no evidence that the change of the work-shift system can guarantee adequate amounts of sleep. It is possible that the workers have to make money in other ways to make their ends meet.
66The following appeared in a letter from a firm providing investment advice to a client.
"Homes in the northeastern United States, where winters are typically cold, have traditionally used oil as their major fuel for heating. Last year that region experienced 90 days with below-average temperatures, and climate forecasters at Waymarsh University predict that this weather pattern will continue for several more years. Furthermore, many new homes have been built in this region during the past year. Because of these developments, we predict an increased demand for heating oil and recommend investment in Consolidated Industries, one of whose major business operations is the retail sale of home heating oil."
1.although the weather is freezing this year, and the experts forecast the weather pattern will continue for several years, the residents may not be update their heating system very soon. Because the weather forecast will never be precise, even it is made by experts, the people may think the weather this year is just a exception.
2.the new built homes maybe have modernized heating system, so it may not need oil at all.
3.if it is really freezing for a long time, the residents may buy the oil in a large amount in the supermarket instead of the retail stores.
8The following appeared in a memorandum issued by the strategic planning department at Omni Inc.
"Mesa Foods, a manufacturer of snack foods that currently markets its products within a relatively small region of the country, has strong growth potential. Mesa enjoyed a 20 percent increase in profits last year, and its best-selling product, Diabolique Salsa, has had increased sales over each of the past three years. Since Omni Inc. is interested in reaching 14-to-25 year olds, the age group that consumes the most snack food, we should buy Mesa Foods, and concentrate in particular on marketing Diabolique Salsa throughout the country."
1.the author’s conclusion that 14 to 25 year olds are the age group that consumes the most snack food relies on no evidence. Other age group may be interested in it too. The author must conduct a poll to strength the conclusion.
2.even assuming that 14 to 25 years olds are the demographic group, the author can not assert that Diabolique Salsa can sales well throughout the country. Maybe the people in the small region of the country love it very much, but it can not stand for other regions.
3.even assuming that the whole country will like the product very much, the author’s conclusion to buy Mesa Foods may be nearsighted. Although the increase is increasing, the future of the product is not clear. Maybe the people don’t like the favor any more.
30According to information recently reported in the Eliottown Gazette, the number of people who travel to Eliottown has increased significantly over the past several years. So far this year over 100,000 people have arrived on flights to Eliottown's airport, compared with only 80,000 last year and 40,000 the year before. Eliottown's train station has received more than 50,000 passengers this year, compared with less than 40,000 last year and 20,000 the year before. Clearly tourism in Eliottown has been increasing, thanks to the new Central Park and Museum of Modern Art that opened last year. Therefore, the funding for the park and museum should be increased significantly.
1.the people arrived on flights or by train does not mean they would go traveling in Eliottown Gazette. They came here with various purposes, maybe visit their relationships or have a meeting.
2.even assuming that most people arrived here went traveling, the author can not make the conclusion that the new Central Park and the Museum of Modern Art are the main cause. Maybe other resorts had been built that attracted most of the tourists.
3.even assuming that the new Central Park and the Museum of Modern Art made the tourism increasing, the author can not assert that the funding should be increased significantly. Both of them were built last year, so they need not much money to maintain. In contrast, other parks or museums may need the money to update themselves.
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