【題目】讀下圖,回答問題。
(1)寫出圖中字母和數(shù)字代表的地理事物的名稱。
山脈:A__________B________C_________
地形區(qū): ①_____________②___________③_________
(2)由右上圖可知我國地形特點(diǎn)是 , 。
(3)在左圖畫出三級階梯的分界線。
(4)簡要分析我國地勢特征對河流產(chǎn)生的影響。
【答案】(1)山脈:A喜馬拉雅山脈B天山C大興安嶺
地形區(qū): ①長江中下游平原②內(nèi)蒙古高原③塔里木盆地。
(2)地形類型多樣,山區(qū)面積廣大。
(3)略
(4)對河流流向影響:我國西高東低的地勢,使我國許多大河自西向東流入海洋。
對水能資源影響:地勢呈階梯狀分布,階梯交界處,河流落差大,水能資源豐富。
【解析】(1)由圖可知,圖中A是位于我國西藏自治區(qū)西南部的喜馬拉雅山,B是位于新疆中部的天山,C是東北-西南走向的大興安嶺。
(2)由右上圖可以看出,我國地勢特點(diǎn)是西高東低、呈三級階梯狀分布。
(3)我國第一、第二階梯分界線是昆侖山-祁連山-橫斷山脈;第二、第三階梯的分界線是大興安嶺-太行山-巫山-雪峰山。
(4)我國地勢對河流流向影響:我國西高東低的地勢,使我國許多大河自西向東流入海洋;對水能資源影響:地勢呈階梯狀分布,階梯交界處,河流落差大,水能資源豐富。
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