在地理研究中,可用重心移动反映地理事物和现象空间分布的变化,

在地理研究中,可用重心移动反映地理事物和现象空间分布的变化,下图表示我国1978-2005年能源生产总量、能源消费总量与GDP重心变化轨迹。完成2-4题。]

2. 能源生产总量、能源消费总量与GDP重心变化轨迹分别对应图中的

    A.abc     B.cba     C.cab     D.bca

3.当前能缩小能源生产重心与能源消费重心东西间距的是

    A.西电东送             B.西气东输    

C.陕西煤炭资源开发     D.东海油气资源开发

4.平均海拔由高到低的省区依次是

A.湘、辽、宁    B.台、鲁、苏  

C.青、粤、晋    D.桂、甘、豫

答案

BDB

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