【題目】下圖為“沿106.5°E我國局部地形剖面圖”，回答下列各題。

【1】圖中①地形區(qū)為

A．黃淮海平原 B．四川盆地

C．江漢平原 D．黃土高原

【2】關于③地形區(qū)的特點，描述正確的是

A．冰川廣布，平坦開闊

B．喀斯特地貌廣布，地表崎嶇

C．千溝萬壑，支離破碎

D．遠看是山，近看成川

【3】有關②地區(qū)的敘述，正確的是

A.土壤鹽堿化嚴重，多中、低產(chǎn)田

B.地勢平坦，草原遼闊

C.水土流失嚴重，小流域宜打壩淤地

D.冬季溫暖，河網(wǎng)密布，水土流失嚴重

【答案】

【1】D

【2】B

【3】D

【解析】

試題分析：

【1】圖示為沿106.5°E我國局部地形剖面圖，圖中①地形區(qū)位于秦嶺北側，是黃土高原，D對。黃淮海平原位于115°E以東地區(qū)，A錯。四川盆地位于秦嶺以南，B錯。江漢平原 位于110°E以東，C錯。

【2】根據(jù)經(jīng)度和地形剖面圖，③地形區(qū)位于四川盆地南側，是云貴高原，喀斯特地貌廣布，地表崎嶇，B對。緯度低，海拔較低，沒有永久冰川分布，地形崎嶇，A錯。千溝萬壑，支離破碎是黃土高原的景觀，C錯。遠看是山，近看成川是青藏高原的寫照，D錯。

【3】結合前面分析，②地區(qū)是四川盆地，由于四面高山環(huán)繞，盆地內(nèi)冬季溫暖，河網(wǎng)密布，水土流失嚴重，D對。土壤肥沃，沒有鹽堿化問題，A錯。盆地內(nèi)部是有主要商品糧基礎，不是牧區(qū)景觀，B錯。 水土流失嚴重，小流域宜打壩淤地是黃土高原的特征。

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