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【题目】读下图,回答下题。

1上图中河流特征及其成因对应正确的是

A. 渭河南岸缺大的、长的支流--地转偏向力影响

B. 河流以冰雪融水补给为主——发源于高原

C. 洛河含沙量小一一流经地区植被覆盖率高

D. 泾河自西北流向东南——地势西北高东南低

2图中泾河流域可持续发展的重点是

A. 加固大堤,治理“地上河” B. 合理采矿,保持水土

C. 引水灌溉,发展农业 D. 修建水库,梯级开发

【答案】

1D

2B

【解析】试题分析:

1】渭河南岸临近秦岭山,受地形影响缺大的、长的支流,A错;图示区域是温带季风气候,河流以雨水补给为主,B错;洛河流经黄土高原,植被覆盖率低,水土流失严重,河流的含沙量大,C错;泾河自西北流向东南,是因为地势西北高东南低。选D正确。

2】泾河段没有地上河A错;泾河流经黄土高原,流域内煤炭资源丰富,要注意合理采矿,保持水土,B正确;流域内应以水土保持为重点,不是引水灌溉为重点,C错;流域内流量较小,不人宜梯级开发,D错。选B正确。

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