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【题目】甲图为某区域图,乙图是甲图中的对应河段及其附近的等潜水位线图,丙图中的年径流量曲线图是从乙图中A、E两处测得的。读图回答下列各题。

【1】关于甲图的说法,正确的是( )

A.位于北半球

B.位于南半球

C.图中河流结冰期较长

D.图中河流径流的季节变化小

【2】关于河流EF段、CD段的说法,正确的是( )

A.EF段流向为由北向南,CD段河水补给潜水

B.EF段流向为由南向北,CD段河水补给潜水

C.EF段流向为由南向北,CD段潜水补给河水

D.EF段流向为由北向南,CD段潜水补给河水

【3】比较a、b、c、d的数值大小( )

A.a>b>c>d B.a<b<c<d

C.a=b=c=d D.无法确定

【答案】

【1】A

【2】B

【3】B

【解析】

试题分析:

【1】读图,甲图中最热月等温线在陆地上向北凸,海洋中向南凸,说明该地位于北半球,A对,B错。 根据海陆位置和图中纬度,该河流位于地中海气候区和温带海洋性气候区,最冷月气温大于0°C,无结冰期,C错。图中河流南段径流的季节变化大,D错。

【2】根据 图丙分析,A地的流量季节变化大,E地流量季节变化小,说明E地受湖泊的调节功能影响。湖泊只能调节下游河段的流量。所以 EF段流向为由南向北,CD段河水水位高于潜水,河水补给潜水,A、C、D错,B对。

【3】结合前面分析,根据河流流向,判断潜水水位的高低,靠近河流上游水位较高 。所以a、b、c、d的数值大小a<b<c<d,B对。A、C、D错。

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