[题目]白银市(103°3'-350°34'E和35°33' -37°38'N)位于甘肃省中部.黄河上游.地处陇西黄土高原.祁连山东延余脉与腾格里沙漠三大区域过渡地带.年日照时数2500-2800小时.无霜期169-220天.属温带干旱.半干旱大陆性气候.下列有关白银市的说法.正确的是 ( )A. 位于中.高纬度 B. 河流都为内流河C. 光热充足利于水稻种植 D. 适宜题目和参考答案——青夏教育精英家教网—

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【题目】白银市(103°3'-350°34'E和35°33' -37°38'N）位于甘肃省中部，黄河上游。地处陇西黄土高原、祁连山东延余脉与腾格里沙漠三大区域过渡地带。年日照时数2500～2800小时，无霜期169～220天，属温带干旱、半干旱大陆性气候。下列有关白银市的说法，正确的是 ( )

A. 位于中、高纬度 B. 河流都为内流河

C. 光热充足利于水稻种植 D. 适宜发展灌溉农业

【答案】D

【解析】A、从白银市的纬度位置看，它属于中纬度地区（30°--60°为中纬度地区）；故不符合题意；

B、流经甘肃的鄂毕河（在中国叫额尔齐斯河）--额尔齐斯河发源于阿尔泰山，流经俄罗斯、哈萨克斯坦等国境，向北注入北冰洋；流经这是西北地区的一条外流河；叙述错误，故不符合题意；

C、我国发展水稻种植业的气候优势条件是：1、雨热同期；2、降水丰富；3、热量充分；白银市属于温带干旱、半干旱大陆性气候，不适宜种植水稻；故不符合题意；

D、灌溉农业定义：①泛指以水浇田的农业；②特指在降雨量极少的干旱、半干旱地区，完全依靠灌溉才能存在的农业。灌溉农业是在干旱半干旱地区，因为降水较少，主要依靠地下水、河流水等水源发展的农业，在我国主要分布在西北地区。

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