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托福阅读词汇题：accumulated

2015-08-20 18:16:55来源：网络

　　【托福阅读题型：accumulated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：accumulated

　　【Paragraph 5】A green iceberg that stranded just west of the Amery Ice Shelf showed two distinct layers: bubbly　blue-white ice and bubble-free green ice separated by a one-meter-long ice layer containing sediments. The green ice　portion was textured by seawater erosion. Where cracks were present, the color was light green because of light　scattering; where no cracks were present, the color was dark green. No air bubbles were present in the green ice,suggesting that the ice was not formed from the compression of snow but instead from the freezing of seawater. Large　concentrations of single-celled organisms with green pigments (coloring substances) occur along the edges of the ice　shelves in this region, and the seawater is rich in their decomposing organic material. The green iceberg did not ontain　　large amounts of particles from these organisms, but the ice had accumulated dissolved organic matter from the　seawater. It appears that unlike salt, dissolved organic substances are not excluded from the ice in the freezing process.　Analysis shows that the dissolved organic material absorbs enough blue wavelengths from solar light to make the ice　appear green.(Green Icebergs)

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

　　○collected

　　○frozen

　　○released

　　○ covered

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

　　○ kept out

　　○ compressed

　　○ damaged

　　○ gathered together

　　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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