| GRE考试易错题（2019/5/15） |
第1题：MYOPIC : DESCRY ::
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| 第2题：This confounding issue______activists across the board: even when a movement does have specific demands and recommendations, the media and the status quo ______acknowledge them. A、angers… frequently B、confronts … judiciously C、puzzles … rarely D、applies to … seldom E、unites… passionately |
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| 第3题：Given that 8 percent of food crops grows faster on farms using groundwater than the aquifers are replenished, and many large rivers are so heavily diverted that they do not reach the sea for much of the year, researchers believe freshwater sources--underground aquifers and rivers--are stresseD、Better management of soil and water and creative cropping patterns can boost production from rainfall-watered cropland, but the heaviest burden will fall on irrigated lanD、At present, most farmers irrigate their crops by channeling water down their fields in parallel furrows. One alternative, drip systems, enables farmers to deliver water directly to the plants’’ roots drop by drop, nearly eliminating waste by distributing water at low pressure through a network of perforated plastic tubing installed on or below the surface of the soil, where it then emerges through small holes at a slow but steady pace.Because the plants enjoy an ideal moisture environment, drip irrigation usually offers the added bonus of higher crop yields.Another alternative, sprinklers, can perform almost as well as drip methods when designed properly, but traditional high-pressure irrigation sprinklers spray water high into the air to cover as large a land area as possible, and the more time the water spends in the air, the more of it evaporates before use. Despite the payoffs, the higher costs of these technologies relative to simple flooding methods have been a barrier to their spread, and so has the prevalence of national water policies that discourage rather than foster efficient water use. Many governments have set very low prices for publicly supplied irrigation, leaving farmers with little motivation to invest in ways to conserve water or to improve efficiency and most authorities have also failed to regulate groundwater pumping, even in regions where aquifers are over-tappeD、Therefore, farmers might be inclined to conserve their own water supplies if they could profit from selling the surplus, but this practice is often discourageD、 Efforts aside from irrigation technologies are also conducive to the reduction of agricultural demand for water; for instance, measurements of climate factors such as temperature and precipitation can be fed into a computer that calculates how much water a typical plant is consuming, and farmers can use this figure to determine, quite accurately, when and how much to irrigate their particular crops throughout the growing season.But the most effective, if unlikely way, to do more with less water is to reconfigure our diets, especially the typical NorthAmerican diet, which, with its large share of animal products, requires twice as much water as diets common in manyAsian and someEuropean countries.Eating lower on the food chain could allow the same volume of water to feed twoAmericans instead of one, and despite the resultant loss of nutrition, this may be the only recourse for countries serious about reducing their aquifer strain. The primary purpose of the passage is to________. A、expose the fragile ecological conditions which modern irrigation technologies must ameliorate B．argue that new irrigation technologies would ultimately be less efficient than a reconfiguration of the NorthAmerican diet C．argue that efficient water-use is dependent upon a mixture of various modern methods D．provide an overall view of possible methods for lessening the strain on sources of freshwater E、describe the cycle by which aquifers are depleted and then replenished through technology |
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| 第4题：Electronic computer speeds are restricted not only by the speed of electrons in matter but also by the escalating density of interconnections necessary to connect the electronic gates on microchips.Electrical engineers and physicists have been developing and augmenting the technologies of analog and digital optical computing, in which the information is primarily carried by photons rather than by electrons. Optical computing could, in principle, generate much higher computer speeds, but one of the problems it has encountered lies in accuracy, for these devices have practical limits of 8 to 11 bits of accuracy in basic operations. Recent research has evinced that digital partitioning algorithms in tandem with error-correction codes, can substantially enhance the accuracy of optical computing operations. In the near term optical computers will most likely be hybrid optical/electronic systems that preprocess input data for computation and post-process output data via electronic circuits, but nevertheless, the prospect of all-optical computing remains highly attractive. Which of the following can be inferred from the passage about the technology employed in optical computing A、The technology is more expensive to develop than the technology that was required in electronic computing. B．The search for technology necessary for all-optical computing is considered unfeasible and has been largely abandoneD、 C．Optical computers systems that rely on digital partitioning algorithms in tandem with error-correction codes are considered hybrid technology. D．The technology necessary for digital optical computing appears within closer reach than the technology for analog optical computing. E．The most feasible version of optical computing at present is a synthesis of electronic and optical technology. |
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| 第5题： MULISH : PLIANCY :: A．(A) piggish : gluttony B．(B) sluggish : reluctance C．(C) kittenish : motility D．(D) apish : servility E．(E) shrewish : amiability |
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