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【題目】讀下面等高線地形圖,完成要求。

(1)寫出圖中字母所在部分的地形名稱:B_________,D________

(2)甲、乙兩地的相對高度約__________米。

(3)甲地在乙地的________方向。

(4)如果在圖示地區建造一座水庫,最適合修建攔水大壩的地點是字母________處。

【答案】鞍部 陡崖 100米 西北 E處

【解析】

根據在等高線地形圖上,等高線閉合且等高線數值中間高四周低則為山頂;兩山頂之間相對低洼的部位為鞍部;高線閉合且等高線數值中間低四周高則為盆地;等高線向海拔低處凸為山脊;等高線向海拔高出凸為山谷;等高線重合的地方為陡崖,進行分析解答。

1)讀圖可得:B位于兩山頂之間相對低洼的部位為鞍部,D位于等高線重合的地方為陡崖。

2)甲地的海拔是250米,乙地的海拔是150米,甲、乙兩地的相對高度約100米。

3)圖中沒有指向標,可根據“上北下南,左西右東”判定,甲地在乙地的西北方向。

4)如果需要修筑一座水庫大壩,應在E處最合適,該處位于盆地的出口處,工程量小。

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