2018_2019学年高中地理每日一题沿地表水平运动物体的偏移(含解析)新人教版必修1.doc

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1沿地表水平运动物体的偏移高考频度: 难易程度:下图是某条河流的剖面图,一般面对河流下游,左手方视为左岸,右手方视为右岸。据此判断该河流位于A北半球 B赤道上 C南半球 D回归线上【答案】A1地转偏向力特点概括项 目 特 点作用范围 水平运动的物体大 小(1)当物体水平运动速度一定时,纬度越高,地转偏向力越大(2)当纬度相同时,物体水平运动速度越大,地转偏向力越大北半球 指向运动方向的右侧南半球 指向运动方向的左侧方 向赤道 无偏向2水平运动物体方向偏向的判定左和右是相对的,因此首先要顺着运动物体前进的方向确定左和右,再根据所在半球确定具体偏转方向。也可采用“左右手定则” ,具体方法如下:南半球用左手,伸开左手,掌心朝上,四指并拢,大拇指自然展开,四指指向物体运2动方向,大拇指的指向即物体受地转偏向力作用后的方向。北半球用右手,伸开右手,掌心朝上,四指并拢,大拇指自然展开,四指指向物体运动方向,大拇指的指向即物体受地转偏向力作用后的方向。具体如下图所示:某军舰在西经(20W,59S)的海面上,沿 20W 经线向南发射导弹,射程为 80 千米,落弹点将在A东半球的中纬度地区 B东半球的高纬度地区C西半球的中纬度地区 D西半球的高纬度地区【 答 案 】 A

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