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新托福阅读词汇150题(145)：fractures&streams

2015-08-20 10:56:59来源：网络

　　【新托福阅读词汇150题(145)：fractures&streams】新托福TPO阅读中，词汇题是重要托福阅读题型。托福阅读词汇题做题需要考生掌握一定的词汇量和做题技巧。本文中新东方在线托福网汇总了新托福阅读词汇150题：fractures&streams。

　　Paragraph 6: Groundwater is stored in the pore spaces and joints of rocks and unconsolidated (unsolidified) sediments or in the openings widened through fractures and weathering. The water-saturated rock or sediment is known as an "aquifer". Because they are porous, sedimentary rocks, such as sandstones and conglomerates, are important potential sources of groundwater. Large quantities of water may also be stored in limestones when joints and cracks have been enlarged to form cavities. Most limestone and sandstone aquifers are deep and extensive but may contain groundwaters that are not being recharged. Most shallow aquifers in sand and gravel deposits produce lower yields, but they can be rapidly recharged. Some deep aquifers are known as "fossil waters. The term "fossil" describes water that has been present for several thousand years. These aquifers became saturated more than 10,000 years ago and are no longer being recharged. 【TPO12- Water in the Desert】

　　7. The word “fractures” in the passage is closest in meaning to

　　○streams

　　○cracks

　　○storms

　　○earthquakes

　　答案见下一页：

本文关键字: 新托福阅读 托福阅读词汇 托福词汇

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