| GRE考试易错题（2019/7/19） |
| 第1题： It can be inferred from the passage that the author believes which of the following concerning the top-down method of nanotechnology A．(A) The top-down method tends to be accurate but highly inefficient, resulting in a process that takes a great deal of time and energy. B．(B) The top-down method, unlike the bottom-up method, tends to disobey the rules of many chemical interactions. C．(C) The top-down method requires a greater level of technological involvement than does the bottom-up method. D．(D) The top-down method shows the limits of nanotechnology methods that rely too heavily on parallel processes. E．(E) The top-down method is fairly useless when applied to the problem of creating a single molecule. |
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| 第2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. It can be inferred from the passage that the author would be more optimistic about optical computing if which of the following were true A、Digital partitioning algorithms could be applied to electronic, and not just optical circuits. B．The speed of photons could be shown to be significantly greater than that of electrons. C．The precision level in basic operations can be substantially increased without great expense. D．The accuracy of electronic circuits used to preprocess input data and post- process data could be greatly increaseD、 E．The microchips optical computer systems were shown to require an increasing density of interconnections. |
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| 第3题： RECLUSE: PRIVACY : : A．puritan: tolerance B．stickler: adherence C．stoic: solemnity D．utopian: conceit E．philanthropist: arrogance |
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| 第4题： There is another kind of spiritual sacrifice as well, quieter and less celebrated, but just as remarkable: that of making each day, in its most______aspects-cooking, eating, breathing—______the absolute. A．(A) necessary … a panegyric for B．(B) quotidian … an oblation to C．(C) prehensile … a sacrifice to D．(D) prosaic … an independence of E．(E) invidious … a paean to |
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| 第5题： MEANDER: A．(A) conduct courteously B．(B) move on purpose C．(C) administer severely D．(D) alter eternally E．(E) be convinced of |
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