gmatprepcr语法重点总结(编辑修改稿)

gmatprepcr语法重点总结(编辑修改稿)内容摘要：

ation that only radios with an RDS feature can receive. Between 1994 and 1996, the number of RDS radio stations in Verdland increased from 250 to 600. However, since the number of RDSequipped radios in Verdland was about the same in 1996 as in 1994, the number of Verdlanders receiving the special program information probably did not increase significantly. Which of the following is an assumption on which the argument depends? (A) Few if any of the RDS radio stations that began broadcasting in Verdland after 1994 broadcast to people with RDSequipped radios living in areas not previously reached by RDS stations. (B) In 1996 most Verdlanders who lived within the listening area of an RDS station already had a radio equipped to receive RDS. (C) Equipping a radio station with RDS technology does not decrease the station39。 s listening area. (D) In 1996 Verdlanders who did not own radios equipped to receive RDS could not receive any programming from the RDS radio stations that began broadcasting in Verdland after 1994. (E) The RDS radio stations in Verdland in 1996 did not all offer the same type of programming. 12. (24967!item!188。 058amp。 001893) Situation: For five years the Souper restaurant chain has maintained rapid sales growth in Danport, primarily by opening new restaurants that draw patrons away from other restaurants in their vicinity. Goal: Souper wishes to achieve continued rapid sales growth in Danport over the next two years. Proposal for consideration: Continue to open new restaurants in Danport during the next two years at the same rate as in the last two years. In light of the situation, which of the following, if true, most strongly argues that adopting the proposal would be an ineffective way of achieving the goal? (A) At times at which customers find Souper restaurants too crowded, they often go to other restaurants nearby. (B) The Souper chain has generally opened new restaurants in locations that are in the vicinity of a large number of other restaurants. (C) Souper restaurants generally offer a much smaller variety of foods than many of the other restaurants in their vicinity. (D) Virtually all potential sites for new Souper restaurants in Danport are located in the vicinity of existing Souper restaurants. (E) Souper restaurants have always offered meals that are somewhat less expensive than meals at restaurants that pete with Souper for patrons. 13. (25752!item!188。 058amp。 002668) An unusually severe winter occurred in Europe after the continent was blanketed by a blue haze resulting from the eruption of the Laki Volcano in the European republic of Iceland in the summer of 1984. Thus, it is evident that major eruptions cause the atmosphere to bee cooler than it would be otherwise. Which of the following statements, if true, most seriously weakens the argument above? (A) The cooling effect triggered by volcanic eruptions in 1985 was counteracted by an unusual warming of Pacific waters. (B) There is a strong statistical link between volcanic eruptions and the severity of the rainy season in India. (C) A few months after El Chichn39。 s large eruption in April 1982, air temperatures throughout the region remained higher than expected, given the longterm weather trends. (D) The climatic effects of major volcanic eruptions can temporarily mask the general warming trend resulting from an excess of carbon dioxide in the atmosphere. (E) Three months after an early springtime eruption in South America during the late 19th century, sea surface temperatures near the coast began to fall. 14. (25938!item!188。 058amp。 002908) Most household appliances use electricity only when in use. Many microwave ovens, however, have builtin clocks and so use some electricity even when they are not in use. The clocks each consume about 45 kilowatthours per year. Therefore, households whose microwave oven has no builtin clock use 45 kilowatthours per year less, on average, than do parable households whose microwave oven is otherwise similar but has a builtin clock. Which of the following is an assumption on which the argument depends? (A) Households that do not have a microwave oven use less energy per year, on average, than do households that have a microwave oven. (B) Microwave ovens with a builtin clock do not generally cost more to buy than microwave ovens without a builtin clock. (C) All households that have a microwave oven also have either a gas oven or a conventional electric oven. (D) Households whose microwave oven does not have a builtin clock are no more likely to have a separate electric clock plugged in than households whose microwave oven has one. (E) There are more households that have a microwave oven with a builtin clock than there are households that have a microwave oven without a builtin clock. 15. (25986!item!188。 058amp。 002914) Some airlines allegedly reduce fares on certain routes to a level at which they lose money, in order to drive petitors off those routes. However, this method of eliminating petition 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 petitors with a better opportunity to undercut the airline39。 s fares. Which of the following, if true, most seriously weakens the argument? (A) In some countries it is not illegal for a pany to drive away petitors by selling a product below cost. (B) Airline executives generally believe that a pany that once underpriced its fares to drive away petitors is very likely to do so again if new petitors emerge. (C) As part of promotions designed to attract new customers, airlines sometimes reduce their ticket prices to below an economically sustainable。