作业帮IBT TPO12 Paragraph 6：Groundwater is stored in the pore spac
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IBT TPO12
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 lime stones when joints and cracks have been enlarged to form cavities.Most limestone and sandstone aquifers are deep and extensive but may contain ground waters 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.
7.The word fractures in the passage is closest in meaning to
○ streams
○ cracks
○ storms
○ earthquakes
这道题为什么选2 我没看懂
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 lime stones when joints and cracks have been enlarged to form cavities.Most limestone and sandstone aquifers are deep and extensive but may contain ground waters 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.
7.The word fractures in the passage is closest in meaning to
○ streams
○ cracks
○ storms
○ earthquakes
这道题为什么选2 我没看懂
fractures 本意是裂痕,所以是 cracks.
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