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【题目】

1我国西北地区绿洲农业的主要灌溉水源来自( )

A. 高山冰雪融水B. 夏季降水C. 湖泊水D. 河流水

2制约西北地区农业生产的主要因素是 ( )

A. 地形条件B. 水源条件C. 光照条件D. 热量条件

3下列关于西北地区农业生产的叙述,正确的是

A. 农田主要分布在有河水、高山融雪水或地下水灌溉的地势平坦的地区

B. 植被由东向西呈现荒漠—荒漠草原—草原过渡的趋势

C. 河西走廊和天山山麓一带广种水稻、小麦、棉花、瓜果

D. 西北地区依靠冰雪融水,畜牧业和林业发达

【答案】

1A

2B

3A

【解析】

1我国西北地区位于我国内陆地区,属于非季风区,降水少。主要靠夏季气候高,高山冰雪融水,所以该地绿洲农业的主要灌溉水源来自夏季高山冰雪融水。故选A。

2西北地区深居内陆,距离海洋远,降水少,气候干旱,制约西北地区农业生产的主要因素是水源,故选B。

3西北地区农田主要分布在有河水、高山融雪水或地下水灌溉的地势平坦的地区;植被由西向东呈现荒漠—荒漠草原—草原过渡的趋势,主要受降水的影响,河西走廊和天山山麓一带广种小麦、棉花、瓜果;西北地区依靠冰雪融水,畜牧业发达。

本题考查的是西北地区的相关知识。

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