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【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

7177

7-9

375

10-6

3427

684

3-8

5262

9-2

1578

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. B. C. 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,河汛期短,河汛期适中,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,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,河位于我国北方地区,不易发生春汛,河流位于南方地区,春汛发生在四月份,故选A。

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