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托福阅读句子简化题：the Mediterranean

2015-08-17 15:33:27来源：网络

　　【托福阅读题型：the Mediterranean句子简化题】托福阅读中句子简化题是重要题型之一。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句子简化题

　　托福阅读句子简化题：the Mediterranean

　　【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 oceanicooze began to accumulate above the old hard layer.(The Geologic History of the Mediterranean)

　　! Which of the sentences below best expresses the essential information in the highlighted sentence in the　passage? Incorrect choices change the meaning in important ways or leave out essential information.

　　○The strait of Gibraltar reopened when the Mediterranean and the Atlantic became connected and the cascades　of water from one sea to the other caused crustal adjustments and faulting.

　　○The Mediterranean was dramatically refilled by water from the Atlantic when crustal adjustments and faulting　opened the Strait of Gibraltar, the place where the two seas are joined.

　　○The cascades of water from the Atlantic to the Mediterranean were not as spectacular as the crustal

　　adjustments and faulting that occurred when the Strait of Gibraltar was connected to those seas.

　　○As a result of crustal adjustments and faulting and the creation of the Strait of Gibraltar, the Atlantic and

　　Mediterranean were connected and became a single sea with spectacular cascades of water between them.



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