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    【题目】下图为“沿106.5°E我国局部地形剖面图”，回答下列各题。

    【1】图中①地形区为

    A．黄淮海平原 B．四川盆地

    C．江汉平原 D．黄土高原

    【2】关于③地形区的特点，描述正确的是

    A．冰川广布，平坦开阔

    B．喀斯特地貌广布，地表崎岖

    C．千沟万壑，支离破碎

    D．远看是山，近看成川

    【3】有关②地区的叙述，正确的是

    A.土壤盐碱化严重，多中、低产田

    B.地势平坦，草原辽阔

    C.水土流失严重，小流域宜打坝淤地

    D.冬季温暖，河网密布，水土流失严重

    【答案】

    【1】D

    【2】B

    【3】D

    【解析】

    试题分析：

    【1】图示为沿106.5°E我国局部地形剖面图，图中①地形区位于秦岭北侧，是黄土高原，D对。黄淮海平原位于115°E以东地区，A错。四川盆地位于秦岭以南，B错。江汉平原 位于110°E以东，C错。

    【2】根据经度和地形剖面图，③地形区位于四川盆地南侧，是云贵高原，喀斯特地貌广布，地表崎岖，B对。纬度低，海拔较低，没有永久冰川分布，地形崎岖，A错。千沟万壑，支离破碎是黄土高原的景观，C错。远看是山，近看成川是青藏高原的写照，D错。

    【3】结合前面分析，②地区是四川盆地，由于四面高山环绕，盆地内冬季温暖，河网密布，水土流失严重，D对。土壤肥沃，没有盐碱化问题，A错。盆地内部是有主要商品粮基础，不是牧区景观，B错。 水土流失严重，小流域宜打坝淤地是黄土高原的特征。

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