题目

Dogs like living with people.A dog can be a very good friend.He can do a lot of things for people.    Some dogs help people to look after sheep,other dogs help them to find lost (丢失的)children.And some of the dogs can help the blind(盲人)do things.    Many years ago there was a ver dog.His name was Seeing Eye dog.Now we can see this kind of dogs all over the world.They are working for the blind.The Seeing Eye dog is strong ,good and easy to train(训练).He helps the blind to walk from place.    Before a dog becomes a Seeing Eye dog,he must go to a training school for abou近十年以来,我国中西部的经济处于快速发展时期。读下列材料,回答问题。(30分) 材料一 图9为我国区域图。图10为黄河壶口瀑布。                  图9                                         图10 (1)黄河壶口瀑布位于位于黄土高原深处的两省交界处,瀑布流向与此河段的整体流向一致,推断壶口瀑布向           侵蚀(北或南)。图9中渭河谷地的成因是                  。(6分) 材料二  图9中阴影部分以干旱严重闻名,该地地形破碎,起伏大,属于水土保持重点治理区。 (2)简述本地区旱灾灾情严重的自然原因。(8分) 材料三  葡萄是喜光作物,适宜在坡地上栽培,水热系数(K值)是影响葡萄品质的重要因素。(K=∑P/∑t×10,其中K为水热系数,∑P为温度≥10℃时期的降水量,∑t为温度>10℃期间的活动积温)。   (3)与世界葡萄酒之都相比较,图11中咸阳乾县、礼泉等地(渭北“旱腰带”)的水热系数情况如何?分析该地区葡萄种植的优势自然条件。(10分) 材料四  近几年,当地的果农栽培“红地球”葡萄,经济收入得到大幅度提高,葡萄的栽培面积已从前几年不足700hm2增加到2200 hm2。 (4)依据可持续发展的内涵提出该区域实现可持续发展的主要途径。(6分)
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