八年级湖南地方文化常识教案
第1课 快速延伸的公路 教学目标: 一、知识与技能
1、了解公路运输的作用及特点
2、了解湖南公路运输建设的成就，及主要是公路分布格局 2、了解公路运输与经济的关系
二、过程与方法
培养学生阅读交通图和统计图表的能力，并运用地图说出我省交通公路运输 的大致公布格局。 三、情感态度与价值观
通过了解我省交通运输业的发展的巨大成就，使学生认识到社会主义制度的 优越性。 教学重点:
1、了解公路运输的作用及特点 2、记住主要的公路运输干线 教学难点:
运用地图说出我省交通公路运输的大致公布格局。 教学方法: 读图分析法、合作探究 教学课时: 1课时 教学过程: 一、导入
(提问)1、请问同学们是如何到达县城的, 2、父母是如何到达单位上班的,
3、家里购买大件商品是用什么运回来的, 4、你出旅游乘坐过的交通工具是什么,
(教材归纳)公路运输业在我们的日常生活中是非常重要的，今天我们就来 一起学习湖南快速延伸的公路。
should be tightened, no loose, Terminal Board wiring should be one on each side, no more than two. J, shielded wire, spare wire binding order, reliable grounding. 7.7 quality standard 7.7.l cables through the cable embedded tube making use of galvanized steel pipe, tube ends without burrs, smooth. 7.7.2 pipe does not allow bending, bending the bend radius should be ? 4 times times the outer diameter of the tube in. 7.7.3 ellipticity of a bent tube, pipe diameter ? 60mm, not >8%, diameter >760mm, not >6%. 7.7.4 making cables buried piping application root production, growing where interface is required, only straight pipe, only the wire port connections, welded connections are not allowed. 7.7.5 service sleeve should have a good grounding. 7.7.6 cable trays installation, burrs and dirt and corrosion treatment should be carried out, install the bridge ... 7.8.1.7 piping and piping, equipment and equipment or piping and other equipment shall have sufficient expansion gap in hot situations. 7.8.1.8 metal temperature of the insulating layer (hot) = shell-wall temperature of environment temperature ? 40 ? c. 7.8.2 paint 7.8.2.l paint of equipment and pipelines should have at least a primer (red paint) and finish. 7.8.2.2 paint appearance color
uniform, without paint, rust, flaking, wrinkles, flow marks, scum, paint particles and visible brush marks. 7.8.2.3 interlayer should be tight and without stratification. 7.8.2.4 pipelines asphalt, fiber glass fabric corrosion, external appearance should never show surrounded by glass fiber cloth uniform, dense, painted pitch inspection should be no delamination, cavitation, homogeneity of asphalt coating, brushing each layer thickness in accordance with design requirements. Standard 7.9 7.9 structure placement process. 1 fair-faced concrete is a concrete surface without any decoration, structure appearance quality of concrete structure that is able to display strength and aesthetic perception of quality standards. Construction technology requirements are as follows: template template Panel selection and processing require plate high strength, good toughness and
二、讲授新课 (一)公路运输
1、(问)什么是公路运输,它有什么特点,
(讲)机动灵活、适应性强、速度较快、“门对门”
2、在什么情况下，公路运输具有明显的优势,(在缺少铁路和水运的地区) (板)(二)湖南运输业的发展
(讲)新中国成立以来，我省公路建设发展迅速，到2007年底，湖南省公路总里程已居全
国前列，已基本形成以长沙为中心的公路运输网络。
(读图)3页，图1—3完成书本第2面活动题，了解我省的哪些公路干线。 (三)湖南公路运输的分布格局