【題目】白銀市(103°3'-350°34'E和35°33' -37°38'N）位于甘肅省中部，黃河上游。地處隴西黃土高原、祁連山東延余脈與騰格里沙漠三大區(qū)域過渡地帶。年日照時數(shù)2500～2800小時，無霜期169～220天，屬溫帶干旱、半干旱大陸性氣候。下列有關(guān)白銀市的說法，正確的是 ( )

A. 位于中、高緯度 B. 河流都為內(nèi)流河

C. 光熱充足利于水稻種植 D. 適宜發(fā)展灌溉農(nóng)業(yè)

【答案】D

【解析】A、從白銀市的緯度位置看，它屬于中緯度地區(qū)（30°--60°為中緯度地區(qū)）；故不符合題意；

B、流經(jīng)甘肅的鄂畢河（在中國叫額爾齊斯河）--額爾齊斯河 發(fā)源于阿爾泰山，流經(jīng)俄羅斯、哈薩克斯坦等國境，向北注入北冰洋；流經(jīng)這是西北地區(qū)的一條外流河；敘述錯誤，故不符合題意；

C、我國發(fā)展水稻種植業(yè)的氣候優(yōu)勢條件是：1、雨熱同期；2、降水豐富；3、熱量充分；白銀市屬于溫帶干旱、半干旱大陸性氣候，不適宜種植水稻；故不符合題意；

D、灌溉農(nóng)業(yè)定義：①泛指以水澆田的農(nóng)業(yè)；②特指在降雨量極少的干旱、半干旱地區(qū)，完全依靠灌溉才能存在的農(nóng)業(yè)。灌溉農(nóng)業(yè)是在干旱半干旱地區(qū)，因為降水較少，主要依靠地下水、河流水等水源發(fā)展的農(nóng)業(yè)，在我國主要分布在西北地區(qū)。

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