2. 外语
  3. In frigid regions a layer of permafrost under the soil surface prevents water from sinking deep into the soil, and so the water

In frigid regions a layer of permafrost under the soil surface prevents water from sinking deep into the soil, and so the water

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问题 In frigid regions a layer of permafrost under the soil surface prevents water from sinking deep into the soil, and so the water (i)______the land, helping to create bog and (ii)______ conditions.
选项
答案C，E
解析 and so表示前后同义重复；and表示前后同义重复。永久冻土层会阻止水渗土壤，所以水不能渗入土壤，也就是说水会留在表面。freeze凝固，parch干燥，inundate淹没。答案选C。积水多了就形成水多的环境，比如沼泽还有第二空需要填写的环境。tropical热带植物，swamp沼泽地，desert沙漠。答案选E。
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