Unit4Globalwarmingbyliujinzeng★Warmingup1.Pleaselistasmanyenergysourcesasyoucan.___________________________________________________________________________2.whichenergysourcesonyourlistarerenewableandwhicharenon-renewable?_______________________________________________________________________________阅读小贴士一我们可以利用构词法来猜测词义。re（重新；再）→new→able→renewable（可再生的）再如，reconstruct___________;regroup__________;rethink_________;reuse_________★Pre-readingActivitiesTalkaboutthepictureatthebottomofthepage251.Whatcanyouseeinthepicture?______________________________________________2.Howdoesitwork?_____________________________________________________________3.Whatdoyouknowabout“greenhousegases”?_______________________________________________________________________________★While-readingActivitiesFirstreadingGlancequicklyatthemagazineandanswerthequestions.1.What’sthemaintopicofthearticle?_______________________________________________2.Whowrotethemagazinearticle?Whatisthenameofthearticle?________________________3.Whatarethenamesofthethreescientistsmentionedinthearticle?_______________________阅读小贴士二PleasereadLEARNINGTIPatpage32.4.Whatarethetwographsabout?Whataretheyfor?_______________________________________________________________________________SecondreadingReadthetextquicklytogetthemainideaofeachparagraph.1.________________________________________________________________2.________________________________________________________________3.________________________________________________________________4.________________________________________________________________5.________________________________________________________________6.________________________________________________________________7.________________________________________________________________阅读小贴士三TopicSentence（主题句）Eachparagraphhasamainidea.Sometimesthemainideaofaparagraphisdirectlywrittendown.Wecallthatsentencetopicsentence.1Thetopicsentencecanappearatthebeginning,middleorendofaparagraph.Mostoften,though,itappearsatthebeginning.ThirdreadingReadthetextquicklytolisttheideasandmajordetails.PartI(paragraph1)tointroducethetopic.(1)_______________________________↓PartII(paragraph_________)(2)_______________________________Howhasglobalwarmingcomeabout?↓(3)________________________________________________tomakelifepositiveeffects_________________forhumanPartIII(paragraph_______)__________________beingsbettereffectsofglobalwarmingnegativeeffects__________________________PartIVthelastparagraphconclusionofthearticle阅读小贴士四Listing（列举）Whenyouread,youcanlisttheideasandmajordetails,whichisofgreatvalueforyourreadingcomprehension.Whilelisting,youcancopywholesentencesandphrases,oryoucanshortenthem,solongasyoucapturethemainidea.Makingalistisliketakingnotes,orwritinganinformaloutline.Whenyouaredone,youhaveyourownstatementofwhatisimportantinthereading.FourthreadingReadeachparagraphcarefullyfordetailedinformation,andfinishtheexercisesblow.PParagraph1aragraph11.Duringthe20thcenturythetemperatureoftheearthroseaboutonedegreeFahrenheit.Notes:Fahrenheit华氏度1714年德国人法勒海特(Fahrenheit)以水银为测温介质,制成玻璃水银温度计，选取氯化铵和冰水的混合物的温度为温度计的零度,人体温度为温度计的100度，把水银温度计从0度到l00度按水银的体积膨胀距离分成100份,每一份为1华氏度，记作“1℉”。...
