托福综合写作.docx
- 文档编号:12212055
- 上传时间:2023-04-17
- 格式:DOCX
- 页数:16
- 大小:7.82MB
托福综合写作.docx
《托福综合写作.docx》由会员分享,可在线阅读,更多相关《托福综合写作.docx(16页珍藏版)》请在冰豆网上搜索。
托福综合写作
托福综合写作
CASESTUDY1
【Reading:
】
Youwillhave3minutestoreadthepassages.
Asfossilfuelsbegintodwindle,ahigherandhigheremphasishasbeenplacedontechnologiestousethesefuelsmoreefficiently.Onefamilyofsuchtechnologiesiscalled“cleancoals”,socalledbecauseitusescoalinless-pollutingways.Thereareatleastthreedistinctadvantagesthatthisfamilydisplays.
Thefirstoftheseresultsfromthenewcoalburningtechnologyandensuresahighercombustionratioandtemperature.Thatis,moreoftheburnablepartofthecoalisactuallyburned.Thegreatbenefithereisthatlesscoalisneededtoobtainbnagivenamountofheatthanwithother,moreprimitive,methods.Acorollarybenefitisthatfarlessburntcoalparticle-matterisreleasedintotheairassmoke.
Second,atechniqueknownas“coalwashing”can,ineffect,purifycoalbeforeburning.Theresultisthatburningsuchcoalreleasesonlyaverysmallamountofsulfurdioxideintotheatmosphere.Thisisakeyadvantage,giventhatsulfurdioxidepollutionisleadingcauseofacidrain.Andacidrain,inturn,isaseriouspollutantofwaterandanimpedimenttoreforestation.
Finally,atechniqueknownas“carboncapture”helpsdrasticallyreducecarbondioxideemissions.Thisisperhapsthebiggestconsiderationofall,sincecarbondioxidehasbeenidentifiedastheleadingculpritincausingthe“greenhouseeffect”andresultinginglobalwarming.
Takentogether,cleancoaltechnologiesgofartoensurethatsuchcoalreservesasremainonEarthwillbeusedinthemostefficientandnon-pollutingmanner.
【lecture】
Nowlistentopartofalectureonthetopicyoujustreadabout.
【EssayTopic】
Summarizethepointsmadeinthelectureyoujustheard,explaininghowtheycastdoubtonpointsmadeinthereading.
Youmustfinishyouranswerin20minutes.
CASESTUDY2
CASESTUDY3
CASESTUDY4
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- 托福 综合 写作