【題目】下圖為我國東南某地區(qū)等坡度線(地表坡度值相等的點(diǎn)連成的線)圖,圖中數(shù)字代表坡度(坡面與水平面的夾角)。讀圖完成下列問題。
【1】圖中河流,流速最快的河段是( )
A.甲 B.乙
C.丙 D.丁
【2】圖示區(qū)域( )
A.P地坡度最陡
B.河流從東北流向西南
C.適宜發(fā)展果林業(yè)
D.Q地位于背風(fēng)坡,土壤水分條件差
【答案】
【1】A
【2】C
【解析】
試題分析:
【1】圖中數(shù)值越大表示坡度越大,而流速與坡度有關(guān),線條越密集表示坡度變化越大,不是坡度越大,注意與等高線疏密的不同。由圖示等坡度線可以看出:圖示甲地坡度最大,C、D值最小,坡度最。涣魉僮羁斓氖茿。選A正確。
【2】注意到圖中右上角有個指向標(biāo),根據(jù)圖P地?cái)?shù)值不是最大,排除A;河流甲處數(shù)值最大,坡度最大,位于上游,而丁出數(shù)值小位于下游,河流流向自甲向丁,為東南向西北,排除B;Q地位于河流的北岸,Q坡面向南,是夏季風(fēng)的迎風(fēng)坡,排除D。本區(qū)坡度較大,適宜林果業(yè),故選C。
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