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EXERCISE 35 1. 例子之前就是想表达的内容,找for example之前的那句话。 2. New pitcher和C选项都是“新的”; 3. A选项定位: radiative properties of methane make it 20 times more effective, molecule for molecule, than carbon dioxide in absorbing radiant heat. BC文中未涉及,答案BC; 4. 定位在: it apparently lags behind temperature during periods of cooling;答案:E 5. 根据carbon dioxide与temperature的对应关系可以知道,答案:B;也可以排除 法: A. Methane也是正相关的关系,也应该降低; B. 答案; C. 第一段提到的内容,与carbon dioxide没有关联性; D. Such feedbacks might involve ice on land and sea, clouds, or water vapor, which also absorb radiant heat,只是说和carbon dioxide一样是certain positive feedbacks. 两者没有必然的相关性; E. 应该相反,因为carbon dioxide会吸收infrared radiation; 6. 感觉同上题,methane & carbon dioxide & temperature都是正相关,答案C; 7. Logic chain: The essential condition for the decay of the vacuum is the presence of an intense electric field. the decay of the vacuum的必要条件是:the presence of an intense electric field, 想要结论不成立,必要条件不成立即可; “An electric field of sufficient intensity to create a charged vacuum is likely to be found in only one place: in the immediate vicinity of a super heavy atomic nucleus” 告诉我们an intense electric field的必要条件是:in the immediate vicinity of a super heavy atomic nucleus, 只需必要条件不成立,结论就不成立; 逻辑思路清楚以后,但发现选项里没有这样的选项,这是为什么呢?因为这道题的 定位不在这一段…… 更好的定位在这段文章的上一段: One might expect that the vacuum would always be the state of lowest possible energy for a given region of space. If an area is initially empty and a real particle is put into it, the total energy, it seems, should be raised by at least the energy equivalent of the mass of the added particle. A surprising result of some recent theoretical investigations is that this assumption is not invariably true. There are conditions under which the introduction of a real particle of finite mass into an empty region of space can reduce the total energy. If the reduction in energy is great enough, an electron and a positron will be spontaneously created. Under these conditions the electron and positron are not a result of vacuum fluctuations but are real particles, which exist indefinitely and can be detected. In other words, under these conditions the vacuum is an unstable state and can decay into a state of lower energy; i.e., one in which real particles are created. 8. This, however, hardly seems a sufficient answer; Again, we may wonder whether this explanation is sufficient; 两处转折接连干掉之前的两种说法,提出自己的主张,答案B; 9. 文章的主题就是讨论购买奢侈品的动机,答案C; 10. 定位在:but did not affect memory enhancements produced by glucose that was not stimulated by adrenaline. 答案B; |
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