[题目]下图中甲是我国东部河流某河段示意图.乙是河流A.B两水文站测得的水位变化图.据此完成下列各题.[1]甲图中AB段河流A．由西北流向东南B．有东南流向西北C．水位A处低于B处D．不能确定[2]乙图中河流出现最高水位时.可能是由于出现下列现象中的造成的A．气旋活动频繁 B．梅雨连绵C．冰雪融化 D．春雨霏霏题目和参考答案——青夏教育精英家教网—

题目内容

【题目】下图中甲是我国东部河流某河段示意图，乙是河流A、B两水文站测得的水位变化图。据此完成下列各题。

【1】甲图中AB段河流

A．由西北流向东南

B．有东南流向西北

C．水位A处低于B处

D．不能确定

【2】乙图中河流出现最高水位时，可能是由于出现下列现象中的造成的

A．气旋活动频繁 B．梅雨连绵

C．冰雪融化 D．春雨霏霏

【答案】

【1】A

【2】B

【解析】

试题分析：

【1】根据图乙分析，A水位站水位季节变化大，说明位于漂泊上游，没有湖泊调节作用影响。B水文站水位变化小，说明位于湖泊下游，受到湖泊调节径流的作用影响。所以甲图中AB段河流自A流向B，即由西北流向东南，A对，B、C、D错。

【2】根据乙图中A水位线的特点，河流出现最高水位时是6月，7、8月份水位较低，该地可能是长江中下游地区，6月份是梅雨天气，降水多，径流量大。7、8月份是伏旱天气所以降水少，径流量下降。是由梅雨连绵的天气造成的，B对。A、C、D错。

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