高中英语人教版 (2019)选择性必修 第四册Unit 3 Sea Exploration背景图课件ppt

这是一份高中英语人教版 (2019)选择性必修 第四册Unit 3 Sea Exploration背景图课件ppt，共15页。PPT课件主要包含了美 文 导 入，○课标词汇，○句型精析，核心素养目标等内容，欢迎下载使用。

素养解读： 我们生活的地球有三分之二的面积被水覆盖。因此很久以前，人类就开始认识海洋、探索海洋。为了寻找海洋航线，我们的祖先不畏艰辛，克服种种困难，为人类征服海洋做出了巨大的贡献。历史上，郑和七下西洋，远及非洲沿岸各国。了解这些历史，有助于培养同学们的文化意识，了解古代中国的强盛，增强同学们的民族自豪感，提升我们的民族自信心。此外，阅读有关海洋探索类的文章，还有助于同学们认识海洋，并且培养同学们自觉热爱海洋、保护海洋、热爱祖国的思想意识。
主题： 营救鲸鱼学科素养：人与自然难度系数：★★★【语篇导读】在澳大利亚的塔斯马尼亚岛，大约270头领航鲸搁浅。这是近年来最大的搁浅事件。本文主要介绍了鲸的现状及人们为拯救鲸所作的努力。
270 Pilt Whales Stranded in TasmaniaArund 270 pilt whales(领航鲸) were stranded① after swimming int shallw② water ff the island f Tasmania in Australia.This is the largest whale-stranding event in years.Peple are wrking hard t save the whales，but at least 90 have died.Every year，arund 2,000 large sea animals，such as dlphins and whales，die by swimming nt a beach r int water that’s t shallw fr them t escape.
This is knwn as “stranding” r “beaching”．Pilt whales and killer whales are sme f the mst cmmnly stranded whales.The current stranding is the largest in Tasmania since 1935.The whales were discvered n Mnday in three different grups－tw grups f abut 30 and ne grup f ver 200．
Rescue wrkers are trying t “reflat” the whales s they can swim away.The jb is especially challenging because the whales are s large.Pilt whales can grw up t 23 feet (abut seven metres) lng and can weigh up t 5,000 punds (abut 2,300 kilgrams).【1】T reflat the whales，they are mved nt a sling③，which allws the rescuers t drag the whales t deeper water. 【2】Many f the whales stranded in Tasmania are in areas that are hard t reach，s it’s hard t get t them with a sling.
Abut 40 wrkers are handling④ the wrk，alng with rughly 20 experienced vlunteers.S far，arund 25 animals have been rescued.Since the rescued whales are likely t return t the place where thers are in truble，wrkers are trying t make sure that rescued whales dn’t get stranded again.Still，abut 90 whales have died s far.Rescue effrts are likely t cntinue fr the next few days.Scientists dn’t fully understand why beachings happen，but they have sme ideas.
It’s pssible that the animals lse their way when they are swimming quickly and fcusing n smething else，like chasing fish r trying t escape⑤ while being chased⑥.Whales and dlphins travel tgether in grups.They wrk tgether clsely，and the grup members generally fllw the leader.When the leader gets beached，it can lead t ther animals getting stranded as well.It’s knwn that a single animal may beach itself if it’s sick r injured.It’s pssible that when grups f whales get stranded，they may be fllwing，r trying t prtect an animal that’s unwell.
①strand /strænd/ vt.使搁浅；使陷于困境②shallw /'ʃæləʊ/ adj.浅的；肤浅的③sling /slɪŋ/ n．吊索④handle /'hændl/ vt.处理；对付⑤escape /ɪ'skeɪp/ v．逃避；避开；避免⑥chase /tʃeɪs/ vt.追逐；追捕
【1】T reflat the whales，they are mved nt a sling，which allws the rescuers t drag the whales t deeper water.分析：本句中的“T reflat the whales”是动词不定式作目的状语。“they are mved nt a sling”是句子的主句部分。后面的which引导非限定性定语从句，修饰前面的名词sling。译文：为了让鲸鱼重新浮起来，它们被转移到一个吊索上，这样救援人员就可以把鲸鱼拖到更深的水里。
【2】 Many f the whales stranded in Tasmania are in areas that are hard t reach，s it’s hard t get t them with a sling.分析：本句是由并列连词s连接的两个并列句。在前面的分句中，“stranded in Tasmania”是动词的-ed形式短语，在句中作定语，修饰前面的复数名词whales。而“that are hard t reach”则是定语从句，修饰前面的复数名词areas。译文：很多鲸鱼在塔斯马尼亚岛搁浅，这个地方很难靠近，所以很难用吊索把它们吊起来。
【语言技能】阅读有关海洋探索的记叙文、说明文，了解世界航海史，增强人类保护海洋的意识。阅读有关海洋探索的说明文，并从中学习有关海洋及海洋生物的词汇、短语和句型的表达。能够就海洋话题，特别是海洋垃圾发表自己的观点看法。听懂有关海洋、海洋生物及海洋保护方面的听力材料。写作一篇有关海洋探索的议论文。学习动词不定式的用法。