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【小站原创】TPO47托福阅读文本及答案解析(Coral Reefs)

2016年06月20日10:17 来源:小站教育作者:小站托福编辑
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摘要:想要全面的了解托福阅读的各类题型,相信TPO材料就是一个不错的选择了。那么,在以下内容中,我们就为大家带来TPO47托福阅读文本及答案解析(Coral Reefs),希望能为大家的备考带来帮助。

托福阅读的备考过程中,除了大量的阅读之外,全面了解托福阅读的题型和解题方法也都是非常重要的环节。那么,在以下内容中就为大家带来TPO47中托福阅读文章题目及相关解析内容,希望能为大家的备考带来帮助。

【小站原创】TPO47托福阅读文本及答案解析(Coral Reefs)图1

Passage 1

An important environment that is more or less totally restricted to the intertropical zone is the coral reef. Coral reefs are found where the ocean water temperature is not less than 21 °C, where there is a firm substratum, and where the seawater is not rendered too dark by excessive amounts of river-borne sediment. They will not grow in very deep water, so a platform within 30 to 40 meters of the surface is a necessary prerequisite for their development. Their physical structure is dominated by the skeletons of corals, which are carnivorous animals living off zooplankton. However, in addition to corals there are enormous quantities of algae, some calcareous, which help to build the reefs. The size of reefs is variable. Some atolls are very large—Kwajelein in the Marshall Islands of the South Pacific is 120 kilometers long and as much as 24 kilometers across-but most are very much smaller, and rise only a few meters above the water. The 2,000 kilometer complex of reefs known as the Great Barrier Reef, which forms a gigantic natural breakwater off the northeast coast of Australia, is by far the greatest coral structure on Earth.

1. According to paragraph 1, all of the following are needed for the growth of coral reefs except? 【否定事实信息题】

A. a solid base to grow on

B. exposure to light

C. the presence of river-borne sediment

D. ocean temperatures of 21 °C or higher

答案:C

解析:原文Coral reefs are found where the ocean water temperature is not less than 21 °C,说明温度不能低于21°C,对应选项D中:21 °C or higher,原文where there is a firm substratum,说明基础一定要坚实,对应选项A中:a solid base,原文the seawater is not rendered too dark,说明不能太暗,对应选项B中:light。过多的沉淀物会遮住光不利于珊瑚礁生长,选项C错在sediment。

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