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GRE阅读题目解析:真菌感染的植物

2017-03-23 09:54:00来源:网络

  P3

  1

  Mycorrhizal fungi infect more plants than do any other fungi and are necessary for many plants to thrive, but they have escaped widespread investigation until recently for two reasons.

  M 真菌感染的植物比其他任何真菌都多,而且是许多植物繁茂所必需的,但直到最近才有关于它的普遍研究,原因有二。

  2

  First, the symbiotic association is so well-balanced that the roots of host plants show no damage even when densely infected.

  首先,这种共生关系如此均衡,以至于宿主植株的根部即便被密集地侵染,也不会表现出丝毫病害。

  3

  Second, the fungi cannot as yet be cultivated in the absence of a living root.

  第二,这种菌类直到现在也不能独立于植物活体根部培养。

  4

  Despite these difficulties, there has been important new work that suggests that this symbiotic association can be harnessed to achieve more economical use of costly superphosphate fertilizer and to permit better exploitation of cheaper, less soluble rock phosphate.

  尽管困难重重,仍有新的重要研究表明,这种共生关系可以被用于经济用途,制取昂贵的过磷酸盐肥料,更好地利用相对廉价的较难溶解的磷酸岩矿。

  5

  Mycorrhizal benefits are not limited to improved phosphate uptake in host plants.

  M 菌的好处,不仅限于促进宿主植株吸收磷酸盐。

  6

  In legumes, Mycorrhizal inoculation has increased nitrogen fixation beyond levels achieved by adding phosphate fertilizer alone.

  预先接种了 M 菌的豆科植物,与只加了磷酸盐肥的情况相比,能够更好地固定氮元素。

  7

  Certain symbiotic associations also increase the host plant‘s resistance to harmful root fungi.

  特定的共生关系,也能促进宿主植株对有害跟菌的抵抗力。

  8. Which of the following most accurately describes the passage?

  (A) A description of a replicable experiment

  (B) A summary report of new findings

  (C) A recommendation for abandoning a difficult area of research

  (D) A refutation of an earlier hypothesis

  (E) A confirmation of earlier research

  选 B

  对于一些新发现的概括介绍。

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

  9. It can be inferred from the passage that which of the following has NOTbeen a factor influencing the extent to which research on mycorrhizal fungi has progressed?

  □A Lack of a method for identifying mycorrhizal fungi

  □B Difficulties surrounding laboratory production of specimens for study

  □C Difficulties ensuing from the high cost and scarcity of superphosphate fertilizers

  选 AC

  选 NOT 项。

  A 句 2 说很多时候即使感染的比较彻底也看不到任何 damage ,然而看不出 damage 不意味着看不出 M 菌,句 3 说难以进行独立于植物的实验室培养,也看不出辨识不了 M 菌的意思。

  B 句 3 。

  C 问的是与研究相关的内容,扯到应用领域就离题了。

  以上就是新东方在线GER频道为你带来的GRE阅读题目解析:真菌感染的植物,更多精彩敬请关注新东方在线GRE频道。

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