答案选a b c 求解析

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答案选abc求解析 答案选a b c 求解析答案选abc求解析2、最高小于700、大于600,最低小于200,大于100,最大高差:只要小于且最大接近700-1

答案选a b c 求解析
 

答案选a b c 求解析

答案选a b c 求解析
2、最高小于700、大于600,最低小于200,大于100,最大高差:
只要小于且最大接近700-100就行.
3、看等高线的形状,指向标,200米等高线向西凸出,河流的流向和等高线的凸起方向相反.河流应该是自西向东流的.
4、解释1:当地下水面与地面相交时,地下水即自然流出成为泉,河阶最易出现涌泉之处为河阶面和河阶崖交界处,因该处地下水面较接近地面.图中丙地即位于河阶面和河阶崖交界处,因此最可能出
解释2:地下水面常与不同地形交界处与地表相交,如果地下水面高于地表便涌出成泉.甲乙丙丁四者唯有丙位于河阶面与坡地的交界处,最有可能出现涌泉.

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