1、Lesson 17 The longest suspension bridge in the world Lead-in 1.Watch a video about different bridges and figure out suspension bridges.Pre-reading1.What is suspension bridge?A suspension bridge is a type of bridge in which the deck(the load-bearing portion)is hung below suspension cables on vertical
2、 suspenders.2.See the List of the longest suspension bridge spans.While-readingTask 1 Read the passage quickly and choose the genre(体 裁)of it.1.Narration 2.Exposition 3.Argumentation记叙文 说明文议论文Task 2 Read the text quickly and use your own words to conclude the main idea of each paragraph.Para.1:Para.
3、2:The history More detailed information (lead-in)Task 3:Read para.1 and decide whether these sentences are T or F.1.Verrazano is an Italian who is well-known.2.Verrazano described Angouleme as a comfortable place.3.Verrazanos name will probably remain immortal because he is a great explorer.FTFNot w
4、ell-knownhe is a great explorer新概念三Lesson17阅读写作（共14张PPT）新概念三Lesson17阅读写作（共14张PPT）Task 4:Read para.2 and fill in the blanks.1.Span:It 4,260 feet.2.Depth:The platforms over 100 feet under the sea.3.Height:Above the surface of the water,the towers nearly 700 feet.4.Length of wire:Each of the four cable
5、s 26,108 wire.5.Capacity:It has been estimated that if the bridge were packed with cares,it would still only be a third of its total .Use verbs and nouns to make your exposition more direct and objective.has a span of extend to a depth of rise to a height of contains lengths of carryingcapacity新概念三L
6、esson17阅读写作（共14张PPT）新概念三Lesson17阅读写作（共14张PPT）Task 5:Read para.2 and complete the table.DesignerLocationDifficulty of designingSpan4,260 feetdepthover 100 feet heightnearly 700 feetLengths of wire26,108capacityCars covered the whole bridge is only a third of its total capacity.constructiontowercablep
7、latform underwater platforms made of Clarity（结构清晰）Othmar AmmannBetween Brooklyn and Staten Islandtake the shape of earth into consideration2 great towersFour huge cablesImmensesteel and concrete新概念三Lesson17阅读写作（共14张PPT）新概念三Lesson17阅读写作（共14张PPT）Post-readingTask 6:Make a summaryExpositiona brief overv
8、iew:HistoryDetailed information1.Structure:2.Content:3.Language:Clarity(清晰)Stress the key points;make it interesting.“v.+n.”to make it more direct and powerful.新概念三Lesson17阅读写作（共14张PPT）新概念三Lesson17阅读写作（共14张PPT）Task 7:Draw a picture of the bridge according to the description.新概念三Lesson17阅读写作（共14张PPT）
9、新概念三Lesson17阅读写作（共14张PPT）Show Time新概念三Lesson17阅读写作（共14张PPT）新概念三Lesson17阅读写作（共14张PPT）Home work Write an exposition about 100 words to describe Egongyan bridge.新概念三Lesson17阅读写作（共14张PPT）新概念三Lesson17阅读写作（共14张PPT）Material you can use:鹅公岩大桥，连接九龙坡区和南岸区，位于重庆市九龙坡区长江九龙滩，与九龙铁路车站和九龙港相邻。于1997年12月开工，总投资概算为14.1亿元人民币。该大桥全长2.7公里，其中正桥长1420米，主桥长1022米，主跨600米。该桥桥型为门型双塔柱悬索桥，主塔高163.9米。2000年建成通车。该大桥连接重庆九龙坡区、南岸区、经济开发区和高新技术开发区四区，对改善重庆的交通网络结构，推动重庆和西部的社会经济发展将起到重要作用。新概念三Lesson17阅读写作（共14张PPT）新概念三Lesson17阅读写作（共14张PPT）
