高三英語(yǔ)課件：選修9u-文庫(kù)吧
2024-12-23 12:22 本頁(yè)面
【正文】 e ocean. sextant The sextant is a navigational instrument for measuring the angle between the horizon and some object in the sky. quadrant nautical chart Nautical charts are maps of the depth of the sea and the currents of the oceans. They provide modern sailors with routes through the seas, rather like roads through the countryside. The information began to be collected in the nieenth century and has continued to be updated ever since. Comprehension Comprehending 1. Read the passage and answer the following questions. 1) What is the use of a bearing circle, astrolabe, quadrant or sextant? ( ) What is the use of a pass? ( ) A. To set the course of the ship B. To measure the position of the ship C. To measure the speed of the ship D. To tell the time A B 4. Read the passage again and use the information to analyse the navigational skills. Using nature 1. To find the ship’s position at sea a sailor used the North Star and the sun. 2. A sailor knew that land was nearby if he saw _________________________________ _______________________. 3. Sailors used ________________________ ________to increase their speed. fresh seaweed, nesting birds returning home in the evening or fog sea currents or tides and winds Sextant: an updated version of the quadrant and so it was more accurate, to measure the angle between two fixed points outside the ship (using two mirrors to find the ship39。s position). 1. How do you think seamen found their way before modern accurate methods of navigation were invented? 在現(xiàn)代精確的導(dǎo)航法尚未發(fā)明之前 , 你認(rèn)為航海員是怎樣探路的 ? Explanation on P11 ① 這是一個(gè)“ 特殊疑問(wèn)詞 +do you think… ” 的雙重疑問(wèn)句結(jié)構(gòu)。除 think以外 believe，guess, suppose等詞也可以用于此結(jié)構(gòu)。 What do you suppose has happened to him? 在 I think／ believe／ guess／ suppose/ imagine等詞的句式中，如果從句有否定，否定詞應(yīng)該前移，即否定轉(zhuǎn)移。 I don’t think he will e． I think he will not e． [正 ] [誤 ] 1. I believe he is an honest man,____________ 2. We don’t think Tom has broken the regulations,_______ 3. Mary guessed his father must have bought her a beautiful shirt,______ Isn’t he? has he? didn’t she ② invent vt．發(fā)明，創(chuàng)作；虛構(gòu)，杜撰 Alexander Graham Bell invented the telephone in 1876. 1876年阿歷山大 格雷厄姆 貝爾發(fā)明了電話。 The whole story was invented. 整個(gè)故事是虛構(gòu)的。 inventor n．發(fā)明者，發(fā)明家，創(chuàng)造者 invention n．發(fā)明，創(chuàng)造；發(fā)明物 discover： invent： Gilbert ___________electricity, but Edison _________the electric light bulb. Who _____________America? Who _____________the puter? 客觀存在，被人發(fā)現(xiàn) 客觀沒(méi)有，被人發(fā)明 discovered invented discovered invented 吉爾伯特發(fā)現(xiàn)了電，愛迪生發(fā)明了電燈。 誰(shuí)發(fā)現(xiàn)了美洲？ 誰(shuí)發(fā)明了電腦？ 2. work out
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