[题目]读我国东部地区三条河流水文站的水文资料.回答下列问题.我国东部地区三条河流的汛期和枯水期比较河流年径流量(亿米3)汛期枯水期起止月径流量(亿米3)起止月径流量(亿米3)①717．77-937510-6342．7②6843-8526．29-2157．8③22904-10203811-3202[1]河流①②③按照纬度由高向低排列.依次是A 题目和参考答案——青夏教育精英家教网—

题目内容

【题目】读我国东部地区三条河流水文站的水文资料，回答下列问题。

我国东部地区三条河流的汛期和枯水期比较

河流	年径流量（亿米3）	汛期		枯水期
河流	年径流量（亿米3）	起止月	径流量（亿米3）	起止月	径流量（亿米3）
①	717．7	7-9	375	10-6	342．7
②	684	3-8	526．2	9-2	157．8
③	2290	4-10	2038	11-3	202

【1】河流①②③按照纬度由高向低排列，依次是

A．①②③ B．②③① C．③②① D．②①③

【2】若河流发生春汛，则①②③中最可能的是

A．① B．② C．③ D．同时发生

【答案】

【1】A

【2】A

【解析】

试题分析：

【1】读统计资料可知，①河汛期短，②河汛期适中，③河汛期最长，结合我国雨带推移规律，我国河流自南向北，雨季逐渐变短，汛期逐渐变短，故选A。

【2】读统计资料可知，①河纬度最高，位于我国东北地区，春季由于季节性积雪融水形成春汛，发生在3月份，②河位于我国北方地区，不易发生春汛，③河流位于南方地区，春汛发生在四月份，故选A。

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