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新托福阅读词汇150题(104):random&pattern

2015-08-17 10:25:35来源:网络

  【新托福阅读词汇150题(104):random&pattern新托福TPO阅读中,词汇题是重要托福阅读题型。托福阅读词汇题做题需要考生掌握一定的词汇量和做题技巧。本文中新东方在线托福网汇总了新托福阅读词汇150题:random&pattern。

  Paragraph 2: Spores light enough to float on the breezes were carried thousands of miles from more ancient lands and deposited at random across the bare mountain flanks. A few of these spores found a toehold on the dark, forbidding rocks and grew and began to work their transformation upon the land. Lichens were probably the first successful flora. These are not single individual plants; each one is a symbiotic combination of an alga and a fungus. The algae capture the sun's energy by photosynthesis and store it in organic molecules. The fungi absorb moisture and mineral salts from the rocks, passing these on in waste products that nourish algae. It is significant that the earliest living thing that built communities on these islands are examples of symbiosis, a phenomenon that depends upon the close cooperation of two or more forms of life and a principle that is very important in island communities. 【TPO9- The Arrival of Plant Life in Hawaii】

  1. The phrase “at random” in the passage is closest in meaning to

  ○finally

  ○over a long period of time

  ○successfully

  ○without a definite pattern

  答案见下一页:

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