托福听力tpo7 Direction: An introductory sentence for a brief summary of the passage is provided below. Complete the summary by selecting the THREE answer choices that express the most important ideas in the passage. Some sentences do not belong in the summary because they express ideas that are not presented in the passage or are minor ideas in the passage. This question is worth 2 points.An expedition to the Mediterranean answered some long-standing questions about the ocean’s history. 答案解析【小站备考】

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13.Direction: An introductory sentence for a brief summary of the passage is provided below. Complete the summary by selecting the THREE answer choices that express the most important ideas in the passage. Some sentences do not belong in the summary because they express ideas that are not presented in the passage or are minor ideas in the passage. This question is worth 2 points.An expedition to the Mediterranean answered some long-standing questions about the ocean’s history.

The Glomar Challenger expedition investigated changes in invertebrate fauna and some unusual geologic features.

Researchers collected fossils to determine which new species migrated from the Atlantic with older species.

Scientists aboard the Glomar Challenger were the first to discover the existence of domelike masses underneath the seafloor.

Samples recovered from the expedition revealed important differences in chemical composition and fossil distribution among the sediment layers.

Evidence collected by the Glomar Challenger supports geologists' beliefs that the Mediterranean had evaporated and become a desert, before it refilled with water.

Mediterranean salt domes formed after crustal movements opened the straits between the Mediterranean and the Atlantic, and the Mediterranean refilled with water.

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ADE The Glomar Challenger选项对应第一段第三句和第二段的第一句，正确 Researchers选项原文没说，不选 Scientists选项与第二段第一句相反，这句说科学家的目的是为了确定那些domelike masse的来源，也就是说以前已经发现了，所以他们不是第一个，错 Samples选项对应整个第三段，正确 Evidence选项对应整个第四段，说地中海曾经干涸，后来又被填满，正确 Mediterranean选项与第四段倒数第六句说反，不选

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