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GRE阅读题目解析:核聚变能源放射性

2017-03-09 18:30:00来源:网络

  P1

  1

  It is a popular misconception that nuclear fusion power is free of radioactivity; in fact, the deuterium-tritium reaction that nuclear scientists are currently exploring with such zeal produces both alpha particles and neutrons.(The neutrons are used to produce tritium from a lithium blanket surrounding the reactor.)

  一个广为流传的误解,是核聚变能源不具备放射性;实际上,当下核科学的热门研究领域氘氚反应,会同时释放阿尔法粒子和中子。(中子来自于包裹核反应堆的锂层,用于制取氘)

  2

  Another common misconception is that nuclear fusion power is a virtually unlimited source of energy because of the enormous quantity of deuterium in the sea.

  另一个普遍的误解是核聚变能源取之不尽,理由是海洋中蕴含着不可计量的氘。

  3

  Actually, its limits are set by the amount of available lithium, which is about as plentiful as uranium in the Earth‘s crust.

  实际上,限制在于我们能获得多少锂,锂的含量大致与地壳中的铀含量相当。

  4

  Research should certainly continue on controlled nuclear fusion, but no energy program should be premised on its existence until it has proven practical. (122 words)

  关于可控核聚变的研究当然该继续,但任何能源项目在证实可实际操作前,都不该仓促上马。

  (premise 此句中做 postulate “假设”解释。

  practical 切合实际的,此句中可以意译地理解为“安全可行的”。

  比较直接的翻译是,……没有证明核能项目安全可行之前,任何项目都不该假设它存在。

  感谢网友 “清理信息源+闭关” 对此句翻译的指正。)

  1. It can be inferred from the passage that the author believes which of the following about the current state of public awareness concerning nuclear fusion power?

  (A) The public has been deliberately misinformed about the advantages and disadvantages of nuclear fusion power.

  (B) The public is unaware of the principal advantage of nuclear fusion over nuclear fussion as an energy source.

  (C) The public‘s awareness of the scientific facts concerning nuclear fusion power is somewhat distorted and incomplete.

  (D) The public is not interested in increasing its awareness of the advantages and disadvantages of nuclear fusion power.

  (E) The public is aware of the disadvantages of nuclear fusion power but not of its advantages.

  选 C

  A 看不出公众是被故意误导的 deliberately,不选;

  B “公众忽视了核聚变作为一种能源的主要优点”,文中只说两种误解,没说什么主要优点,不选;

  C 正确项,公众关于核聚变能的一些科学事实的看法是扭曲和不完整的(误解);

  D 有没有 interested ,无从判断,不选;

  E 啊,让人疲劳的瞎聊。

  For the following question, consider each of the choices separately and select all that apply

  2. The passage provides information that would answer which of the following questions EXCEPT?

  □A How much incidental radiation is produced in the deuterium tritium fusion reaction?

  □B What is likely to be the principal source of deuterium for nuclear fusion power?

  □C Why are scientists exploring the deuterium-tritium fusion reaction with such zeal?

  选 AC

  A 氘氚聚变反应产生了多少附带的辐射,不知道。

  B 句 2 有提示,“海洋中的氘”。

  C 为啥科学家热衷探究氘氚聚变反应,不羁到。

  以上就是新东方在线GER频道为你带来的GRE阅读题目解析:核聚变能源放射性,更多精彩敬请关注新东方在线GRE频道。

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