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【题目】保护性耕作法是指对耕地实行免耕或浅耕措施,并在粮食收割时,将作物秸秆粉碎后还田,或者将庄稼荐子留在田地过冬。下表为某地实验前后有关实验资料,回答下列问题。

土壤水分

土壤空气

土壤有机质

大气悬浮质

大气水分

实验前

6.3%

25.5%

0.7%

14.6%

18.6%

实验后

23.5%

16.7%

3.2%

3.4%

34.5%

【1】实验结果反应了实行保护性耕作法

保持土壤水分 增强土壤透气性 增加大气湿度 减少空气污染

A.①②③ B.①③④ C.①②④ D.①②③④

【2】由表可知,该地最可能是

A.东南丘陵B.云贵高原C.河套平原D.江汉平原

【答案】

【1】B

【2】C

【解析】

试题分析:

【1】考查阅读、分析材料能力。实验后土壤水分比例增加,正确。实验后土壤中空气比例降低,透气性减弱,错误。实验后大气水分比例增加,增加大气湿度,正确。实验后大气悬浮质比例降低,正确。故选B。

【2】由表格中信息,土壤水分少,土壤有机质少,可知该地区气候干旱,土壤贫瘠。只有河套平原地区降水较少。C项正确。故选C。

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