考点1:生活中的立体图形例1下列图形:(?)分别是由,(?)中的()旋转得到.A.(1)、(2)、(3)B.(1)、(3)、(4)C.(2)、(3)、(4)D.(2)、(4)、(3).解析:通过观察会发现答案应为D.评注:解答此类题的关键是:弄清各类几何体的本质特征.要在具体情景中,通过自己的观察,加深“点动成线、线动成面、面动成体”的认识.例2一个正方体的每个面分别标有1,2,3,4, Test Point 1: The three-dimensional figure in life Example 1 The following figure: (?) is obtained by () rotation in (), and obtained by A.(1),(2),(3)B.(1),( 3), (4) C. (2), (3), (4) D. (2), (4), (3). Analysis: Through observation will find that the answer should be D. Commentary: Answer such questions The key is to understand the essential features of various types of geometry. Through their own observations, it is necessary to deepen the understanding of “kicking into lines, moving into lines, and moving into adults” in specific situations. Example 2 Each of the cubes The faces are labeled 1, 2, 3, 4, respectively.