新人教版选修九Unit2 Warming up and Reading课件1

1、Review important phrases受支配对表示怜悯开拓视野把钱存入银行对渴求拆除，拆毁撕毁撕成碎片依依不舍地离开，远离被认为是找不到了随机的，任意的at the mercy of have mercy on /show mercy to broaden/expand ones horizonsdeposite money in a bankbe thirsty for tear down tear up tear sth to piecestear yourself away from be reckoned (considered)to be /asnowhere to be

2、foundat random陷入困境在黄昏/在黎明日常事物打破常规紧张的氛围出发，开始鬼门关；死神义务教育参考；谈及确切地说简化这个问题最新的消息有做的倾向依靠某人做be caught /trapped in a dilemmaat dusk/dawndaily routinebreak a routinetense atmosphereset loosejaws of deathcompulsory educationrefer to to be precisesimply the problemthe uptated informationhave a tendency to rely o

3、n sb to do 1.voyage 2. mercy 3. alongside4. minimum 5. reference 6. update 7. expedition 8. compulsory 9. reform10. incident11. deposit 12. dilemma 13. dusk15. thirst 16. tear 航海航海仁慈仁慈在旁边在旁边最小最小 最低最低提到提到 参考参考更新更新 提高提高远险远险必须的必须的 义务的义务的改革改革插曲插曲 事变事变放放 安置安置困境困境 黄昏黄昏渴渴望渴渴望眼泪眼泪 .撕撕 /拆拆 16. random17. hori

4、zon18. nowhere19. latitude 20.encyclopedia21. celestial bodies 22.tide 23.kot 24.log 25.nautical miles 26.magnetic 27.the bearing circle 28.the astrolable 29.the quadrant 30.the sextant随意随意 任意任意地平线地平线 视野视野 无处无处维度维度百科全书百科全书天体天体潮汐潮汐结结原木原木海里海里有磁性的有磁性的方位圆方位圆星盘星盘象限，四分仪象限，四分仪六分仪六分仪31.accelerate the speed加

5、速compassAstrolabe(星盘星盘)Sextant(六分仪六分仪)sea/nautical chartnavigatorsearly navigational instrumentRead about what navigation（导航）（导航） was like before modern instruments were used.Whats the purpose for the writer to write the passage? To tell how seamen explored the ocean before the 17th century . To exp

6、lain what was important to sail across the ocean C. To illustrate some ways to plot a ships position on a mapD. To introduce an encyclopedia. Sailing the oceans Fast-reading to get the general idea.Page 1Using nature l Keeping alongside the coastlinel Using celestial bodiesl Using wildlifel Using th

7、e weatherl Using the seaUsing celestial bodiesto plot the positionsto work out the latitudea special cloud formation indicates there is land close by( 2 minutes )Using wildlifeIf seaweed was fresh and smelled strongly, the ship was close to land.Sea birds could be used to show the way to land when i

8、t was nowhere to be seen.Using the weatherTo help identify the position of a stream or river whenTo direct their sailing“ Current” in the last paragraph on page 1 means _ . A winds B. clouds C. tendency of seawater going D. atmosphere . Use the information to analyze the navigational skills and writ

9、e the answers in your own words. To find the ships position at sea a sailor used _. A sailor knew that land was nearby if he saw_ _. Sailors used _ _ to increase their speed.the North Star and the sun.sea currents or tides andwindsUsing nature clouds , fresh seaweed,nesting birds or fog Fast-reading

10、 to get the general idea. then answer the questions.Page 2Using navigational instruments 1. Finding longitude 2. Finding latitudel the bearing circle (方位圆方位圆)l the astrolabe (星盘星盘)l the quadrant (象限仪象限仪,四分仪四分仪)l the sextant (六分仪六分仪)Read again and fill in the blanksThere were two methods to find long

11、itude: 1. _ 2._measuring time and speedcompass and complicatedmathematical tablesUsing instruments ( 1 minute )Write down the working principles of the following instruments:Astrolabe:Quadrant:Sextant:to compare the height of the sun now with the position of the sun at midday.to compare the position

12、 of the ship in relation to some stars or the sun.a more precise form of the astrolabe, to measure how high stars are above the horizon using a quarter circle rather than the full circle of the astrolabe.an updated version of the quadrant and so it was more accurate, to measure the angle(角度角度) betwe

13、en two fixed pints outside the ship.( 5 minutes )1. We may well wonder how seamen explored the ocean before latitude and longitude make it possible to plot a ships position on a map. 我们很可能感到奇怪，在经纬度被用来在地图上标出位置以前，海员是如何对海洋进行探索的。句中it做形式宾语，真正的宾语为不定式to plot a ships position on a map在英语中，动词make,find,think,

14、feel ,consider,believe等后，常用it 做形式宾语。 翻译：她认为照顾好这个病人是她的职责。_ She considered it her duty to look after the patient.2. The voyages of travellers before the 17th century show that they were not at the mercy of the sea even though they didnt have modern navigational aids. 3. modern navigational aids.4.alon

15、gside the coastline 5.accomplished navigators 6.work out their latitude 17世纪以前的航海记录显示，即使没有现代航海技术的帮助，旅行者们也不是任凭海洋摆布的。7. This seems to have been the first and most useful form of exploration which carried the minimum amount of risk.这似乎已经是最早的，最有用的探险方式，所谓的风险也最小。seems to have done 表示“似乎已经”eg: Our country

16、seems to have changed much.seems to be doing 似乎正在eg: The naughty boy seems to be watching TV while doing his homework.8.There is a special cloud formation which indicated there is a land close by.9.Seabirds could be used to show the way to land when it was nowhere to be found.10.The earliest, the as

17、trolabe, was a special all-in-one tool for telling the position of the ship in relation to the sun and various stars which covered the whole sky. 有一种特殊的云彩的形状表明附近有陆地。在看不见陆地的时候，可以用海鸟来指明通往陆地的去路。最早的是星盘，它是一种集多功能于一体的工具，它可以用来表明船只同太阳和布满天空的各种星星之间的相关位置。复习：1.使成为可能2.标出船的位置3.受支配4.现代的导航器材5.优秀的航海员6.计算出纬度7.看不见/找不到了8.加速9.某种潮汐或洋流10.打结的绳子11.复杂的数字表12.直线航行13.而不是任意的航线14.集多功能于一体的工具15.和有关16.参照点之一17.更精确和简化的版本18.更新的版本make it possibleplot a ships position at the mercy of modern navigational aidsaccomplished navigators work out latitudenowher