2018版高中英语人教版选修七课件：unit 3 period one　warming uppre-reading & reading .pptx

Unit 3 Under the sea,“The noise made by boats of whale watching tourists may be causing communication problems for the animals，” British researchers said last week. Whale watching is a popular tourist activity in places where groups of killer whales live.Every day，dozens of boats filled with tourists go to watch the beautiful animals.Unfortunately，the engines of the boats make a lot of noise，and that may be causing problems for the whales，according to a report in the US science magazine Nature.,,话题导入,The whales travel in groups，and communicate with each other through sonic(声波的) calls that some scientists refer to as singing.The sounds of the boat engines may be creating too much background noise for the whales to be able to hear each other. The researchers listened to recordings of whale calls made between 15 and 25 years ago，before whale watching became popular.These were compared to more recent recordings. They found that the animals have started to sing for longer than they used to，like a person shouting to a friend across a noisy room.,It is believed that the whales are trying to communicate hunting or breeding information.Scientists said that，if this is prevented，the future of the world’s whale population could be in danger，since the noise may be drowning out important communication about mates(配偶) or food. “Animals become slow in mind and repeat themselves in noisy areas，” said Volker Deecke，a Canadian biologist.“They have to say things twice or three times in order to be understood.”,The killer whales studied were living off the coast of northwestern America.The number of killer whales in this area has been falling for several years，but scientists are not sure why.,1.What does the word “breeding” mean according to the context? It means “ ”. 2.What does the passage mainly tell us? The passage mainly tells us . 3.Why do whales sing? .,根据上文完成下列各题,producing young animals/whales,communication problems of the killer whales,caused by whale watching,To communicate with each other./To communicate hunting or breeding,information,基础自测,课文预读,内容索引,要点探究,当堂达标,Period One Warming Up，Pre­-reading & Reading,,基础自测,1. adj.每年的；按年度计算的 n.年刊；年鉴 adv.每年；按年度计算 2. vt.当场见到；目击 n.目击者；证人；证据 3. n.住所；住宿 v.容纳；向……提供住处,Ⅰ.重点单词,annual,annually,witness,accommodation,accommodate,4. prep.在……对面 adj.相对的；相反的 5. vi.& n.暂停；中止 6. vi.逃避；逃跑 vt.逃离 7. vt.拖；拉；扯 8. n.深(度)；深处 adj.深的 adv.深地 adv.深深地,opposite,pause,flee,drag,depth,deep,deeply,9. vt.催促；极力主张；驱策 10. vt.放弃；遗弃；抛弃 adj.被抛弃的 11. n.关系；血缘关系；交往 n.关系；亲戚 12. n.保存；保护,abandon,abandoned,relationship,relation,conservation,urge,Ⅱ.重点短语,1. 整理；分类 2. 及时 3. 瞄准；针对 4. 在此期间；与此同时 5. 举起；支撑；耽搁 6. 帮助(某人)摆脱困境或危难,sort out,in time,aim at,in the meantime,hold up,help (.) out,Ⅲ.重点句式,This was the call that announced there . 这是宣告捕鲸行动马上就要开始的呼声。

1.be about to do sth.,As we drew closer，I could see a whale (attack) by a pack of about six other killers. 当我们靠的近些时，我能看到一条鲸鱼正在被其他大约六条虎鲸袭击2.see＋宾语＋宾补,was about to be a whale hunt,being attacked,“.And those others are stopping it (dive) or (flee) out to sea，” George told me， (point) towards the hunt. “……而其他那些虎鲸则阻止它潜水或逃跑，”乔治一边指着捕猎的情景，一边告诉我3.stop sb./sth.(from) doing sth.；现在分词作伴随状语,4.现在分词短语作原因状语,，the whale soon died. 因为严重受伤，鲸鱼很快就死了diving,fleeing,pointing,Being badly wounded,,课文预读,Ⅰ.根据课文内容给下面句子排序 ( )Using a telescope we could see that something was happening. ( )The killers started racing between our boat and the whale. ( )Clancy arrived at the station. ( )The men started turning the boat around to go home. ( )Clancy heard a huge noise coming from the bay. ( )The whaler yelled out. ( )We jumped into the boat with the other whalers and headed out into the bay. ( )The man in the bow of the boat aimed the harpoon at the whale.,5,6,1,8,2,3,4,7,Ⅱ.课文阅读理解 1.According to the text，which of the following is TRUE? A.They ran down to the shore and found an enormous fish throwing itself out of the water. B.Tom couldn’t tell whalers when he found a whale. C.George was a patient person. D.George could beat the water with his oar to call Old Tom.,√,答案,1,2,3,4,5,6,2.According to the text，which of the following is NOT true? A.The killers like Old Tom are fierce yet always ready to help the whalers. B.The writer didn’t believe the killers could help the whalers catch whales before working at the whaling station. C.The whalers left the body of the whale eaten up by the killers. D.It was hard to handle the boat in the rough sea.,1,2,3,4,√,答案,5,6,3.Why did George beat the water with his oar? A.To frighten the whales away. B.To call back Old Tom to lead the way. C.To attract the attention of huge whales. D.To send signals to other whales.,1,2,3,4,√,答案,5,6,4.Why did the men start turning the boat around to go home after the whale died? A.Because they didn’t need a dead whale. B.Because they couldn’t find the whale’s body. C.Because they knew th。