英语人教版选修九unit2sailingtheoceans导学案.doc

Unit 2 Sailing the oceans 导学案高三英语备课组 袁海新 Section Ⅰ Warming Up & Reading课文大意理解1. When did early sailors have a practical method of measuring longitude?A. The 12th century B. The 17th centuryC. The 15th century D. The 16th century2. What does seaweed look like when it is near land?A. It looks nice B. It looks small C. It looks D. It looks dark3. Where are we now when the North Star is along the horizon?A. At the equator B. At the North Pole C. At the South Pole D. At sea4. From the reading we have learned 　　　 .A. why early seamen wanted to sail the seven seasB. that there is useful information in an encyclopediaC. that early sailors went exploring the sea using their skills and simple instrumentsD. why latitude and longitude are important to plot a ship’s position5. The main idea of this passage is about　 　 .A. that keeping alongside the coastline is first and most useful form of exploration.B. the skills and navigational aids early seamen used while sailing the oceansC. that finding longitude and latitude is a must to plot a ship’s position on a mapD. how the early sailors used their skills and simple instruments课文缩写填空This reading explains how seamen 1 the oceans and what kind of navigational 2 were used to sailors before the seventeenth century when they were 3 the open seas without seeing land. The 4 of travellers before the 17th century show that they were not at the 5 of the sea even though they did not have modern navigational aids. The seamen could use 6 bodies, wildlife , the weather or the sea to keep 7 the coastline. They could also use the 8 to help find the direction that the ship needs to go. They could use the 9 circle to measure the sun’s position and tell if they were sailing on their correct rather than a random course. While the astrolabe, the quadant and the sextant could help give the seamen the local time and allowed them to find their 10 at sea.名师全程导析nowhere near 离……很远 be nowhere 一无所得，一事无成nowhere 为否定副词，放于句首时，　句子要用倒装语序［单词点击］1. Mercy (1)n. [C]仁慈；宽恕They showed no mercy to their hostages. 他们对人质丝毫不讲仁慈。

2)n. [C]幸运；恩惠It’s a mercy that the explosion happened after the theatre. 爆炸发生在散戏以后，真是不幸中之大幸at one’s mercy 在某人的支配和摆布之下 have mercy on sb. show mercy to sb. without mercy 毫不留情地 It’s a mercy that真是幸运leave sb. / sth. to the mercy / mercies of sb. / sth. 听任某人（可能受到虐待而无能为力）throw yourself on sb. ‘s mercy 指望某人能够善待（或宽恕）你；请求某人的宽恕He is at the mercy of his wife. 他任凭他妻子摆布She treated her stepson without mercy. 她毫不留情地对待她的继子［即境活用2］　完成句子(1)We were . (拿天气没办法)(2) (幸运的是)she wasn’t seriously hurt.(3)We show (决不怜悯)the enemies of the people.2. minimum(1)n. [C]最小量；最小数；最低限度；最小值You must get a minimum of 40 questions right to pass the examination.你最少必须答对40道题才能通过考试。

The minimum pass mark in the examinations is 60 out of 100. 考试的最低及格分数是100分中答对60分2)adj. 最小的；最少的；最低的最大值与最小值　　　　　　max 最大值→［英］maximum n. 最大值　　　　　　min 最小值→［英］minimum n. 最小值　上面两词的复数是变um为a或直接加s［数字］a minimum charge / price 最低收费/价格［即境活用3］　完成句子(1)The work was done with (没费什么劲)2)The class needs (最少6名学生)to continue.(3)As (绝对最低要求)，you should spend two hours on the evening studying.3. horizon n. [C]地平线；（常pl.）视野；眼界；见识The sun sank below the horizon. 太阳落到了地平线下。

horizontal adj. 水平的；与地面平行地；横的 horizontally adv. 水平地；与地面平行地；横地on the horizon 很可能即将发生；已露端倪 broaden one’s horizons 开阔某人的眼界She wanted to travel to broaden her horizons. 她想旅行，以开阔眼界［即境活用4］　完成句子(1)I could see a ship (在天水交接处).(2)A financial crisis is (即将爆发).4. nowhere adv. 无处；任何地方都不；无目的；无结果He is nowhere to be seen. 任何地方都见不着他That will take (get) you nowhere .你那样做不会成功的那会使你一事无成）Nowhere is the book to be found. 这本书在任何地方都找不着［即境活用5］Nowhere policy more apparent than in agriculture.A. is the effect of government B. the effect of government is C. are the effect of government D. the effect of government are5. secure(1) adj. 安全的；可靠的；无忧虑的；安心的Our house is secure from flood.　我们的房子没有被淹的危险。

At last they were able to feel secure about the future. 他们终于觉得不必为将来而担忧了2) vt. 使安全；保卫Some measures are needed to secure the bank from a flood.这道堤防需要采取一些措施，免得被洪水冲坏 securely adv. 牢固地；稳固地 security n. 保护措施；保安部门［即境活用6］　完成句子（1） 安装了锁和防护栏后，窗户很安全了The windows locks and bars.（2） She’d allowed herself into (一种虚假的安全感中).6. precise adj. 准确的；精确的；明确的；细致的；认真的Can you give a more precise definition of the word? 你能给这个词下个更确切的定义吗？Doctors found it hard to establish the precise nature of her illness. 医生们难以判定她的确切病因。

This room is about 20 —well , 19.5 square meters, to be more precise. 这个房间约20平方米，嗯，确切地说，19.5平方米。