【托福阅读备考】官方真题Official1托福阅读词汇真题练习——plugged&washed

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Paragraph 5: So much for unconsolidated sediments. Consolidated (or cemented) sediments, too, contain millions of minute water-holding pores. This is because the gaps among the original grains are often not totally plugged with cementing chemicals; also, parts of the original grains may become dissolved by percolating groundwater, either while consolidation is taking place or at any time afterwards. The result is that sandstone, for example, can be as porous as the loose sand from which it was formed. 【官方真题Official1- Groundwater】

9. The word “plugged” in the passage is closet in meaning to

○washed

○dragged

○filled up

答案：(3)

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