- UID
- 982804
- 在线时间
- 小时
- 注册时间
- 2014-2-20
- 最后登录
- 1970-1-1
- 主题
- 帖子
- 性别
- 保密
|
1、Not all life depends on energy from sunlight. Microbial life has been found in bedrock more than five kilometers below the surface of the Earth, and bacteria have been found on the deep ocean floor feeding on hydrogen and other gases rising from the interior of the Earth through vents in the ocean floor.
The statements above, if true, best support which of the following as a conclusion?
A The location in the bedrock where microbial life was found was not near a system of volcanic vents through which hydrogen and other gases rose from the interior of the Earth.
B Bacteria are able to exist at the molten center of the Earth.
C A thorough survey of a planet's surface is insufficient to establish beyond a doubt that the planet contains no life.
D Life probably exists on Sun-orbiting comets, which are cold agglomerations of space dust and frozen gases.
E Finding bacterial remains in coal and oil would establish that the bacteria had been feeding on substances that had not been produced from the energy of sunlight.
2、From 1978 to 1988, beverage containers accounted for a steadily decreasing percentage of the total weight of household garbage in the United States. The increasingly widespread practice of recycling aluminum and glass was responsible for most of this decline. However, although aluminum recycling was more widely practiced in this period than glass recycling, it was found that the weight of glass bottles in household garbage declined by a greater percentage than the weight of aluminum cans.
Which of the following, if true of the United States in the period 1978 to 1988, most helps to account for the finding?
A Glass bottles are significantly heavier than aluminum cans of comparable size.
B Recycled aluminum cans were almost all beverage containers, but a significant fraction of the recycled glass bottles had contained products other than beverages.
C Manufacturers replaced many glass bottles, but few aluminum cans, with plastic containers.
D The total weight of glass bottles purchased by households increased at a slightly faster rate than the total weight of aluminum cans.
E In many areas, glass bottles had to be sorted by color of the glass before being recycled, whereas aluminum cans required no sorting.
3、Advertisement: For sinus pain, three out of four hospitals give their patients Novex. So when you want the most effective painkiller for sinus pain, Novex is the one to choose.
Which of the following, if true, most seriously undermines the advertisement's argument?
A Some competing brands of painkillers are intended to reduce other kinds of pain in addition to sinus pain.
B Many hospitals that do not usually use Novex will do so for those patients who cannot tolerate the drug the hospitals usually use.
C Many drug manufacturers increase sales of their products to hospitals by selling these products to the hospitals at the lowest price the manufacturers can afford.
D Unlike some competing brands of painkillers, Novex is available from pharmacies without a doctor's prescription.
E In clinical trials Novex has been found to be more effective than competing brands of painkillers that have been on the market longer than Novex.
4、Some airlines allegedly reduce fares on certain routes to a level at which they lose money, in order to drive competitors off those routes. However, this method of eliminating competition cannot be profitable in the long run. Once an airline successfully implements this method, any attempt to recoup the earlier losses by charging high fares on that route for an extended period would only provide competitors with a better opportunity to undercut the airline's fares.
Which of the following, if true, most seriously weakens the argument?
A In some countries it is not illegal for a company to drive away competitors by selling a product below cost.
B Airline executives generally believe that a company that once underpriced its fares to drive away competitors is very likely to do so again if new competitors emerge.
C As part of promotions designed to attract new customers, airlines sometimes reduce their ticket prices to below an economically sustainable level.
D On deciding to stop serving particular routes, most airlines shift resources to other routes rather than reduce the size of their operations.
E When airlines dramatically reduce their fares on a particular route, the total number of air passengers on that route increases greatly.
5、A major chemical spill occurred five years ago at Baker's Beach, the world's sole nesting ground for Merrick sea turtles, and prevented nearly all the eggs laid that year from hatching. Yet the number of adult female Merricks returning to lay their eggs at Baker's Beach has actually increased somewhat since five years ago. Clearly, environmentalists' prediction that the world's Merrick population would decline as a result of the spill has proven unfounded.
Which of the following, if true, most seriously undermines the argument offered in refutation of the environmentalists' prediction?
A The chemical spill five years ago occurred at a time when there were neither Merrick sea turtles nor Merrick sea turtle eggs on Baker's Beach.
B Female Merrick sea turtles begin returning to Baker's Beach to lay their eggs when they are ten years old.
C Under normal conditions, only a small proportion of hatchling female Merrick sea turtles survive in the ocean until adulthood and return to lay their eggs at Baker's Beach.
D Environmental pressures unrelated to the chemical spill have caused a significant decline in the population of one of the several species of sea birds that prey on Merrick sea turtle eggs.
E After the chemical spill, an environmental group rejected a proposal to increase the Merrick sea turtle population by transferring eggs from Baker's Beach to nearby beaches that had not been affected by the spill.
|
|
京公网安备11010202008513号 京ICP证101109号 京ICP备12012021号
发表于 2014-4-16 23:31:55
收藏
收藏
