2018_2019学年高中数学第二章点、直线、平面之间的位置关系2.1.2空间中直线与直线之间的位置关系情境导学素材新人教A版必修2.doc

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2018_2019学年高中数学第二章点、直线、平面之间的位置关系2.1.2空间中直线与直线之间的位置关系情境导学素材新人教A版必修2.doc_第1页
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12.1.2 空间中直线与直线之间的位置关系【情境导学】立交桥是伴随高速公路应运而生的.城市的立交桥不仅大大方便了交通,而且成为城市建设的美丽风景.为了车流畅通,并安全地通过交叉路口,1928 年,美国首先在新泽西州的两条道路交叉处修建了第一座苜蓿叶形公路交叉桥.1930 年,芝加哥建起了一座立体交叉桥.1931年到 1935 年,瑞典陆续在一些城市修建起立体交叉桥.从此,城市交通开始从平地走向立体.若把立交桥抽象成直线,它们是否在同一平面内?有何特征?(有的在同一平面内,有的不在同一平面内;不在同一平面内的直线无公共点)

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