试题与答案

读我国沿北纬36度附近地形剖面图,回答下列问题:(8分) (1)我国地势特点:

题型:综合

题目:

读我国沿北纬36度附近地形剖面图,回答下列问题:(8分)

 

(1)我国地势特点:_______________,呈______________分布。(2分)

(2)第一级阶梯地形以____________为主;平均海拔__________米以上。(2分)

(3)这种地势对河流流向的影响是                                ,也使许多大河在阶梯交界处,落差大,水流急,蕴藏着丰富的       资源。(2分)

(4)福建位于我国的第三级阶梯,该阶梯的地形以_______、_______为主。(2分)

答案:

(1)西高东低 三级阶梯状   

(2)高原  4000

(3)受地势影响,河流自西向东流  水能

(4)平原 丘陵

题目分析:

(1)根据地形剖面图得知,我国的地势是呈阶梯状分布,西高东低。

(2)第一阶梯的地形区有青藏高原和柴达木盆地,地形以高原为主。第二阶梯的地形区有塔里木盆地、准格尔盆地、四川盆地,内蒙古高原,黄土高原,地形以高原、盆地为主。第三阶梯的地形有东北平原,华北平原,长江中下游平原,东南丘陵,地形以平原丘陵为主。第一阶梯平均海拔在4000米以上,第二阶梯平均海拔在2000米以上,第三阶梯平均海拔在500米以下。

(3)地势西高东低,①气候上,西高东低地势使海洋上湿润空气深入内地,供给大量水汽(边讲边画)有利于农业生产。复杂多样的地形,也增加了我国气候的复杂性。

②交通上,使许多大河滚滚东流,方便了我国东西交通,也方便了我国沿海和内地的联系。长江(指图)干流自古以来就是我国东西交通的大动脉。

③水力资源上,许多大河从高一级阶梯流入低一级阶梯,水流湍急,(边讲边画)水量又丰富,这样水能就十分巨大了。

(4)第三阶梯的地形有东北平原,华北平原,长江中下游平原,东南丘陵,地形以平原丘陵为主。第三阶梯平均海拔在500米以下。

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