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专家解题:2012年职称英语考试理工类A级完形填空历年真题及答案解析1

来源: 发布时间:2014-08-29
 考题类型:完形填空
  SolarPower without Solar Cells    Adramatic and surprising magnetic effect of light discovered by University of Michigan researchers could lead to solarpower without traditional semiconductor-based solar cells.   The researchers found a way to make an "optical(光的) ______(51)," said StephenRand, a professor in the departments of Electrical Engineering and ComputerScience, Physics and Applied Physics.   Light has electric and magnetic ______(52). Until now, scientiststhought the effects of the magnetic field were so weak that they could be______ (53). What Rand and his colleagues found is that at the right intensity,when light is traveling through a material that does not ______ (54)electricity, the light field can generate magnetic effects that are 100 milliontimes stronger than previously expected. Under these circumstances, themagnetic effects develop strength ______ (55) to a strong electric effect.   "This could lead to a new kind of solar cell without semiconductorsand without absorption to produce charge separation," Randsaid. "In solar cells, the ______ (56) goes into a material, gets absorbedand creates heat. Here, we expect to have a very low heat load. Instead of thelight being absorbed, energy is stored in the magnetic moment. Intensemagnetization can be induced by intense light and then it is ultimately capableof providing a capacitive power ______ (57)." What makes this possible isa previously undetected brand of "optical rectification," saysWilliam Fisher, a doctoral student in applied physics. In traditional opticalrectification, light's electric field causes a charge separation, or a pulling______ (58) of the positive and negative charges in a material. This sets up avoltage, similar to ______ (59) in a battery.   Rand and Fisher found that under the right circumstances and in righttypes of materials, the light's magnetic field can also create opticalrectification. The light must be shone through a ______ (60) that does notconduct electricity, such as glass. And it must be focused to an intensity of10 million watts per square centimeter. Sunlight isn't this ______ (61) on itsown, but new materials are being sought that would work at lower intensities,Fisher said.  "In our most recent paper, we show that incoherent light likesunlight is theoretically almost ______ (62) effective in producing chargeseparation as laser light is,” Fisher said.   This new ______(63) could make solar power cheaper, the researchers say.They predict that with improved materials they could achieve 10 percentefficiency in converting solar power to useable energy. That's equivalent totoday's commercial-grade solar cells.  "To manufacture modern solar cells, you have to do ______ (64) semiconductorprocessing," Fisher said. "All we would need are lenses to focus thelight and a fiber to guide it. Glass works for ______ (65). It's already madein bulk, and it doesn't require as much processing. Transparent ceramics mightbe even better."-51. (    )A. disc   B. battery  C. instrument   D. fiber 专家解题:第一步:首先看选项,本题的四个选项都是名词,考查名词的词义辨析。第二步:接下来看横线51,横线51的句子是:The researchers found a way to make an "optical______(51)," 第一段说:密歇根大学发现, 光所产生的巨大磁效应有望用于太阳能发电, 从而取代传统的半导体太阳能电池。第三步:再看选项,根据原文,这里要填入一个表示“电池”含义的词,只有B选项battery符合要求,所以这道题答案选择B选项。52. (    )  A. components  B. applications  C. resources D. differences 专家解题:第一步:首先看选项,本题的四个选项都是名词,考查名词的词义辨析。第二步:接下来看横线52,横线52的句子是: Light has electric and magnetic ______(52). 光具有电磁成分。第三步:再看选项,根据原文,这里要填入一个表示“成分”含义的词,A选项components符合要求,所以这道题的答案选择A选项。53. (    )  A. ignored  B. concerned C. expected D. noticed 专家解题:第一步:首先看选项,本题的四个选项都是动词,考查动词的词义辨析。第二步:接下来看横线53,横线53的句子是:Until now, scientists thought the effects of the magnetic field wereso weak that they could be ______ (53).而以前的科学家认为电磁光太微弱, 不值得去关注。第三步:再看选项,根据原文,这里要填入一个表示“不值得去关注”含义的词,A选项ignored的意思是“忽视,不关注”的意思,符合句意,所以本题答案选择A选项。54. (    ) A. produce  B. conduct  C. use D. consume 专家解题:第一步:首先看选项,本题的四个选项都是动词,考查动词的词义辨析。第二步:接下来看横线54,横线54的句子是:What Rand and his colleagues found is that at the right intensity,when light is traveling through a material that does not ______ (54)electricity...Rand和他的同事的发现是, 在适当的强度下, 当光通过一个不导电的物质, 光场产生的磁效应比以前想象的要大一亿倍。第三步:再看选项,根据原文,这里要填入一个和前面的does not合起来表示“不导电”含义的词,B选项conduct表示的是导电的意思,和前面的does not合起来就表示“不导电”,符合句意,所以本题答案选B选项。55. (    )  A. reactive B. preferable C. equivalent  D. due 专家解题:第一步:首先看选项,本题的四个选项都是形容词,考查形容词的词义辨析。第二步:接下来看横线55,横线55的句子是:Under these circumstances, the magnetic effects develop strength______ (55) to a strong electric effect.在这种情况下, 光磁效应所释放的能量等同于强电效应。第三步:再看选项,根据原文,这里要填入一个和后面的介词to合起来表示“等同于,等价于”含义的词。比较选项,C选项equivalent符合句意,所以这道题的答案选择C选项。
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