官方真题Official7托福阅读词汇真题练习——scores&Turbulent
- 2015年12月11日13:22 来源：小站整理
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在托福阅读备考中，想要快速的提升自己的托福阅读能力，除了不断的累积自己的词汇和句型之外，从官方真题Official练习入手也不失为一个不错的方法。那么，在以下内容中我们就为大家带来官方真题Official7托福阅读词汇，希望能为大家托福阅读备考带来帮助。
Paragraph 4: The time had come to formulate a hypothesis. The investigators theorized that about 20 million years ago, the Mediterranean was a broad seaway linked to the Atlantic by two narrow straits. Crustal movements closed the straits, and the landlocked Mediterranean began to evaporate. Increasing salinity caused by the evaporation resulted in the extermination of scores of invertebrate species. Only a few organisms especially tolerant of very salty conditions remained. As evaporation continued, the remaining brine (salt water) became so dense that the calcium sulfate of the hard layer was precipitated. In the central deeper part of the basin, the last of the brine evaporated to precipitate more soluble sodium chloride (salt). Later, under the weight of overlying sediments, this salt flowed plastically upward to form salt domes. Before this happened, however, the Mediterranean was a vast desert 3,000 meters deep. Then, about 5.5 million years ago came the deluge. As a result of crustal adjustments and faulting, the Strait of Gibraltar, where the Mediterranean now connects to the Atlantic, opened, and water cascaded spectacularly back into the Mediterranean. Turbulent waters tore into the hardened salt flats, broke them up, and ground them into the pebbles observed in the first sample taken by the Challenger. As the basin was refilled, normal marine organisms returned. Soon layer of oceanic ooze began to accumulate above the old hard layer. 【官方真题Official7- The Geologic History of the Mediterranean】
8. The word “scores” in the passage is closest in meaning to
○members
○large numbers
○populations
○different type
11. The word “Turbulent” in the passage is closest in meaning to
○Fresh
○Deep
○Violent
○Temperate
答案： (2)(3)
