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不知道这些题怎样,试验一下哈哈~
1. When three Everett-owned Lightning-built airplanes crashed in the same month, the Everett company ordered three new Lightning-built airplanes as replacements. This decision surprised many in the airline industry because, ordinarily when a product is involved in accidents, users become reluctant to buy that product. Which of the following, if true, provides the best indication that the Everett company's decision was logically well supported? (A) Although during the previous year only one Lightning-built airplane crashed, competing manufacturers had a perfect safety record. (B) The Lightning-built airplanes crashed due to pilot error, but because of the excellent quality of the planes there were many survivors. (C) The Federal Aviation Association issued new guidelines for airlines in order to standardize safety requirements governing preflight inspections. (D) Consumer advocates pressured two major airlines into purchasing safer airplanes so that the public would be safer while flying. (E) Many Lightning Airplane Company employees had to be replaced because they found jobs with the competition. Key:B 2. Robot satellites relay important communications and identify weather patterns. Because the satellites can be repaired only in orbit, astronauts are needed to repair them. Without repairs, the satellites would eventually malfunction. Therefore, space flights carrying astronauts must continue. Which of the following, if true, would most seriously weaken the argument above? (A) Satellites falling from orbit because of malfunctions burn up in the atmosphere. (B) Although satellites are indispensable in the identification of weather patterns, weather forecasters also make some use of computer projections to identify weather patterns. (C) The government, responding to public pressure, has decided to cut the budget for space flights and put more money into social welfare programs. (D) Repair of satellites requires heavy equipment, which adds to the amount of fuel needed to lift a spaceship carrying astronauts into orbit. (E) Technical obsolescence of robot satellites makes repairing them more costly and less practical than sending new, improved satellites into orbit. Key:E 3. Since the deregulation of airlines, delays at the nation's increasingly busy airports have increased by 25 percent. To combat this problem, more of the takeoff and landing slots at the busiest airports must be allocated to commercial airlines. Which of the following, if true, casts the most doubt on the effectiveness of the solution proposed above? (A) The major causes of delays at the nation's busiest airports are bad weather and overtaxed air traffic control equipment. (B) Since airline deregulation began, the number of airplanes in operation has increased by 25 percent. (C) Over 60 percent of the takeoff and landing slots at the nation's busiest airports are reserved for commercial airlines. (D) After a small midwestern airport doubled its allocation of takeoff and landing slots, the number of delays that were reported decreased by 50 percent. (E) Since deregulation the average length of delay at the nation's busiest airports has doubled. Key:A 4. Laws requiring the use of headlights during daylight hours can prevent automobile collisions. However, since daylight visibility is worse in countries farther from the equator, any such laws would obviously be more effective in preventing collisions in those countries. In fact, the only countries that actually have such laws are farther from the equator than is the continental United States. Which of the following conclusions could be most properly drawn from the information given above? (A) Drivers in the continental United States who used their headlights during the day would be just as likely to become involved in a collision as would drivers who did not use their headlights. (B) In many countries that are farther from the equator than is the continental United States, poor daylight visibility is the single most important factor in automobile collisions. (C) The proportion of automobile collisions that occur in the daytime is greater in the continental United States than in the countries that have daytime headlight laws. (D) Fewer automobile collisions probably occur each year in countries that have daytime headlight laws than occur within the continental United States. (E) Daytime headlight laws would probably do less to prevent automobile collisions in the continental United States than they do in the countries that have the laws. Key:E 5.The following appeared in the opinion column of a financial magazine: “On average, middle-aged consumers devote 39 percent of their retail expenditure to department store products and services, while for younger consumers the average is only 25 percent. Since the number of middle-aged people will increase dramatically within the next decade, department stores can expect retail sales to increase significantly during that period. Furthermore, to take advantage of the trend, these stores should begin to replace some of those products intended to attract the younger consumer with products intended to attract the middle-aged consumer.”
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