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    【题目】 我国有一座山脉,该山脉以北夏秋季节苹果挂满枝头,冬季树木落叶;该山脉以南稻田逑片,柑橘满山,树木四季长青。据此,完成下面小题。

    【1】该山脉与淮河共同构成了我国东部地区重要的地理分界线,该山脉是（ ）

    A.昆仑山脉B.祁连山脉C.阴山山脉D.秦岭

    【2】造成该山脉南北两侧自然景观不同的主要原因是（ ）

    A.地形不同B.气候不同C.耕种方式不同D.耕种技术不同

    【3】该山脉与淮河共同构成了我国东部地区重要的地理界线,它与下列界线大致相吻合（ ）

    ①1月份0°C等温线

    ②400毫米年等降水量线

    ③800毫米年等降水量线

    ④季风区和非季风区的分界线

    ⑤湿润地区和半湿润地区的分界线

    A.①②④B.①②③C.①③⑤D.②③④

    【答案】

    【1】D

    【2】B

    【3】C

    【解析】

    根据秦岭、淮河一线是我国东部地区重要的地理界线，在它的南北两侧，自然环境、地理景观和居民的生产生活习惯有明显的差异．秦岭、淮河主要是我国四大区域中，南方地区与北方地区的分界线；一月份0℃等温线通过的地方；800mm等降水线通过的地方；温度带中，暖温带与亚热带分界线；干湿地区中，湿润区与半湿润区分界线；温带季风气候与亚热带季风气候分界线；水稻、小麦的分界线；水田与旱地的分界线；亚热带常绿阔叶林与暖温带落叶阔叶林的分界线等，进行分析解答。

    【1】

    秦岭与淮河共同构成了我国东部地区重要的地理分界线，是我国四大区域中，南方地区与北方地区的分界线；一月份0℃等温线通过的地方；800mm等降水线通过的地方，D正确。故选D。

    【2】

    秦岭——淮河一线为我国一月0℃等温线，同时也是我国800mm等降水量线，因此，南北两侧气候的不同，从而影响到两侧种植业的不同，南方为水田，主要种植水稻，北方为旱地，主要种植小麦，B正确。故选B。

    【3】

    秦岭、淮河一线是我国东部地区重要的地理界线，是1月份0°C等温线经过的地方；是800毫米年等降水量线经过的地方；是湿润地区和半湿润地区的分界线等，C正确。故选C。

    本题主要考查秦岭——淮河的地理意义。

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