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托福阅读词汇题：scores

2015-08-18 16:39:22来源：网络

　　【托福阅读题型：scores词汇题】托福阅读中词汇题是重要题型之一。根据托福阅读题型不同来进行专项练习，是短期提高托福阅读能力的有效方法。同学们需要多加练习哦!

　　查看全部：托福阅读题型分类练习之词汇题

　　托福阅读词汇题：scores

　　【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.(The Geologic History of the Mediterranean)

　　The word “scores” in the passage is closest in meaning to

　　○members

　　○large numbers

　　○populations

　　○different types

　　! The word “Turbulent” in the passage is closest in meaning to

　　○Fresh

　　○Deep

　　○Violent

　　○Temperate

　　答案见下一页：

本文关键字: 托福阅读题型 托福阅读训练 词汇题

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