ideological and theoretical qualities and practical working ability, and strive to build a contingent of league cadres with positive work style and high quality. Hold a regular meting of the party secretary every fortnightly, arrange the work of the regiment, fedback the student information. Focus on training junior high school, junior high school secretary of the regiment branch to enable them to raise A firm political conviction, diligent and diligent learning spirit and practical and innovative work style.第八单元 视图、投影与变换第 31 课时 视图与投影教学目标【考试目标】1.视图、左视图、俯视图），会推断简单物体的三视图，能 根据三视图描述简单的几何体或实物原型；2.了解直棱柱、圆锥的侧面展开图，能根据展开图想象和制作立体模型；3.了解基本几何体与其三视图、展开图（球除外）之间的关系；知道这种关系在现实生活中的应用（如物体的包装）；4.能根据光线的方向辨认实物的阴影；5.了解中心投影和平行投影.【教 学重点】1.掌握几何体的三视图.2.掌握投影现象.教学过程一、体系图引入，引发思考二、引入真题、归纳考点【例 1】（2024 年江西 ）有两个完全相同的正方体，按下面如图方 式摆放，其主视图是（C）【解析】主视图是指从物体的前面对后面所观察到的视图，并且看不见的线要画成虚线.观察实物图，可以看出只有选项 C 符合题意；【例 2】（2024 年随州）如图，是某工件的三视图，则此工件的表面积为 （D）Strengthen the team connection, strengthen the knowledge education among the students (especially the first grade students), and promote the formation of good school spirit with the influence of the league members. All League branches should start with recommending outstanding students as the development objects of the League, take amateur league schools as the basis, conscientiously do a good job in the work of pre-league education, league membership education, League members' vanguard exemplary consciousness education, excellent league members' e...
