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2017职称英语理工类A级完形填空强化辅导(1)_职称英语考试

时间:2018-05-31来源:何谓四恶网 -[收藏本文]

2017年职称英语理工类A级完形填空强化辅导(1)

  应对策略:

  (1)掌握教材上的文章内容,尤其是新增文章。把这些文章在考前一个月内,争取背到“滚瓜烂熟”,这样,就算考试时怎样变化都可以应付。

  (2)语法知识的总结和固定搭配、词组的记忆。这样在做题时,阅读整篇文章,考生才能从头判断每个空所缺的词的语言形式,如词类、时态、语态,并判断该词应具有的符合文章上下文的词义,最后从给出的四个选项中,选出在语法与词义上均与原文相符合的一个。

  阅读下面的短文,文中有15处空白,每处空白给出了4个选项,请根据短文的内容从4个选项中选择1个最佳答案。

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  Better Solar Energy Systems: More Heat, More Light

  Solar photovoltaic thermal energy systems, or PVTs, generate both heat and electricity, but (1) now they haven’t been very good at the heat-generating part compared to a stand-alone solar thermal collector. That’s because they operate at low temperatures to cool crystalline silicon solar cells, (2) lets the silicon羊羔疯有哪些前期症状表现 generate more electricity but isn’t a very efficient way to gather heat.

  That’s a problem of economics. Good solar hot-water systems can harvest much more energy than a solar-electric system at a substantially lower (3) . And it’s also a space problem: photovoltaic cells can (4) up all the space on the roof, leaving little room for thermal applications.

  In a pair of studies, Joshua Pearce, an associate professor of materials science and engineering, has devised a (5) in the form of a better PVT made with a different kind of silicon. His research collaborators are Kunal Girotra from Thin Silicon in California and Michael Pathak and Stephen Harrison from Queen’s University, Canada.

  邢台羊癫疯手术治疗Most solar panels are made (6) crystalline silicon, but you can also make solar cells out of amorphous silicon, commonly known as thin-film silicon. They don’t create as much electricity, but they are lighter, flexible, and cheaper. And, because they (7) much less silicon, they have a greener footprint. (8) , thin-film silicon solar cells are vulnerable to some bad-news physics in the form of the Staebler-Wronski effect.

  “That means that their efficiency drops when you (9) them to light―pretty much the worst possible effect for a solar cell,” Pearce explains, which is one of the (10) thin-film solar panels make up only a small fraction of the market.

  However, Pearce and his team found a (11) t抗癫痫药物需服用多久才能见效o engineer around the Staebler-Wronski effect by incorporating thin-film silicon in a new (12) of PVT. You don’t have to cool down thin-film silicon to make it work. In fact, Pearce’s group discovered that by heating it to solar-thermal operating temperatures, near the boiling (13) of water, they could make thicker cells that largely (14) the Staebler-Wronski effect. When they applied the thin-film silicon directly to a solar thermal energy collector, they also found that by baking the cell once a day, they (15) the solar cell’s electrical efficiency by over 10 percent.

  1. A. unless B. until C. when D. if

  2. A. which B. what C. that D. who

  3. A. reward B. bill C. cost D. pay

癫痫小发作

  4. A. take B. move C. set D. live

  5. A. decision B. suggestion C. qualification D. solution

  6. A. for B. as C. by D. with

  7. A. retrieve B. require C. merge D. exchange

  8. A. certainly B. luckily C. unfortunately D. immediately

  9. A. cover B. expose C. relate D. face

  10. A. restrictions B. advances C. strengths D. reasons

  11. A. way B. part C. result D. subject

  12. A. size B. type C. shape D. brand

  13. A. area B. place C. point D. extent

  14. A. promoted B. overcame C. improved D. assessed

  15. A. defined B. wasted C. lowered D. boosted

  参考答案: BACAD DBCBD ABCBD