【题目】“天山南北好牧场,葡萄瓜果甜又甜……戈壁沙滩变良田,积雪融化灌农庄……”根据歌词回答下面小题。
【1】歌词描述的省级行政区是( )
A. 云南省B. 湖北省C. 海南省D. 新疆维吾尔自治区
【2】该地区“葡萄瓜果特别甜”是由于( )
A. 内陆盆地,地形闭塞B. 沙漠地区,土壤肥沃
C. 高山冰雪,水源充足D. 日照充足,昼夜温差大
【答案】
【1】D
【2】D
【解析】
新疆光照充足,但降水少,农产品植物白天光合作用剧烈,有利于着色,昼夜温差大,晚上气温很低,使农作物呼吸作用减弱。降低了瓜果积累的糖分消耗。
【1】新疆是我国主要的牧区,所出产的肉、奶、皮、毛等畜产品在国内占据突出地位,天山牧场是重要的畜牧基地。由于日照时数多,昼夜温差大,有利于长绒棉、甜菜、小麦等农作物的生长,杏、桃、梨、葡萄、哈密瓜等水果蜚声中外;故选:D。
【2】新疆深居内陆,距海较远降水稀少,气候干旱;白天日照充足,热量丰富,植物光合作用效率很高;到了夜晚,骤然降温,昼夜温差大,大气和土壤中的热量迅速散失,植物进入“休眠”状态,自身呼吸作用大幅度减弱,白天借助于光合作用所形成的养分得以有效积累,从而使瓜果的质量大为提高;故选:D。
本题考查了新疆的农业及发展农业的有利于条件。
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