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    精英家教网 > 高中地理 > 题目详情

    【题目】某山区为了改造低产的山坡地，先是增施肥料，但农作物增产效果微弱。后将山坡地改造成水平梯田，增产效果显著。完成下列问题。

    【1】增施肥料效果微弱的最主要原因是该地

    A.土层薄 B.降水变率大 C.坡度大 D.植被覆盖率低

    【2】将山坡地改造成水平梯田，主要是为了

    A.调节大气温度 B.提高土壤肥力

    C.增大空气湿度 D.增加日照时数

    【答案】

    【1】 C

    【2】B

    【解析】

    试题分析：

    【1】山区农业进行生产，一般来说坡度比较大，容易造成水土流失。所以导致增施肥料但增产效果不明显。山区应因地制宜发展梯田农业能够有效保持水土，故C正确。

    【2】梯田能够有效保持水土，保持土壤肥力。梯田并不能调节大气温度、增加日照时数和增加大气湿度，故B正确。

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