题目内容

【题目】下图为我国东南某地区等坡度线（地表坡度值相等的点连成的线）图，图中数字代表坡度（坡面与水平面的夹角）。读图完成下列问题。

【1】图中河流，流速最快的河段是（ ）

A．甲 B．乙

C．丙 D．丁

【2】图示区域（ ）

A．P地坡度最陡

B．河流从东北流向西南

C．适宜发展果林业

D．Q地位于背风坡，土壤水分条件差

【答案】

【1】A

【2】C

【解析】

试题分析：

【1】图中数值越大表示坡度越大，而流速与坡度有关，线条越密集表示坡度变化越大，不是坡度越大，注意与等高线疏密的不同。由图示等坡度线可以看出：图示甲地坡度最大，C、D值最小，坡度最小；流速最快的是A。选A正确。

【2】注意到图中右上角有个指向标，根据图P地数值不是最大，排除A；河流甲处数值最大，坡度最大，位于上游，而丁出数值小位于下游，河流流向自甲向丁，为东南向西北，排除B；Q地位于河流的北岸，Q坡面向南，是夏季风的迎风坡，排除D。本区坡度较大，适宜林果业，故选C。

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