[题目]青藏高原形成一种特殊的高原气候.但利用大棚技术使得拉萨的瓜果蔬菜供应充足.据此完成下列问题.[1]拉萨利用大棚技术种植瓜果蔬菜.主要是改善了当地的A．热量条件 B．光照条件 C．水分条件 D．土壤条件[2]拉萨原来不产西瓜.引种后发现:直接“铺在地上生长的西瓜长不好.只有将西瓜藤蔓架空.西瓜“挂着才能结果.西瓜“挂着的� 题目和参考答案——青夏教育精英家教网—

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【题目】青藏高原形成一种特殊的高原气候，但利用大棚技术使得拉萨的瓜果蔬菜供应充足。据此完成下列问题。

【1】拉萨利用大棚技术种植瓜果蔬菜，主要是改善了当地的

A．热量条件 B．光照条件

C．水分条件 D．土壤条件

【2】拉萨原来不产西瓜，引种后发现：直接“铺”在地上生长的西瓜长不好，只有将西瓜藤蔓架空，西瓜“挂”着才能结果。西瓜“挂”着的原因是

A．大棚内的地面温度比空气温度低，不利于西瓜的发育成熟

B．可以减少叶子对西瓜的遮掩，增强光照，促进光合作用

C．可以充分利用立体空间，节省土地、节省大棚面积，减少农业投入

D．土壤干燥，直接“搁”在地上，容易使西瓜的水分蒸发

【答案】

【1】A

【2】A

【解析】

试题分析：

【1】青藏高原气温低对农业生产不利。塑料大棚起到了保温作用, 拉萨利用大棚技术种植瓜果蔬菜，主要是改善了当地的热量条件。A 正确。

【2】题干中的直接“铺”在地上生长的西瓜长不好,只有将西瓜藤蔓架空,西瓜“挂”着才能结果说明大棚内的地面温度比空气温度低，不利于西瓜的发育成熟。A 正确。

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