Unit1Scienceandscientists單詞練習(xí)課件-高中英語人教版選擇性_第1頁
Unit1Scienceandscientists單詞練習(xí)課件-高中英語人教版選擇性_第2頁
Unit1Scienceandscientists單詞練習(xí)課件-高中英語人教版選擇性_第3頁
Unit1Scienceandscientists單詞練習(xí)課件-高中英語人教版選擇性_第4頁
Unit1Scienceandscientists單詞練習(xí)課件-高中英語人教版選擇性_第5頁
已閱讀5頁，還剩20頁未讀， 繼續(xù)免費閱讀

下載本文檔

版權(quán)說明：本文檔由用戶提供并上傳，收益歸屬內(nèi)容提供方，若內(nèi)容存在侵權(quán)，請進行舉報或認(rèn)領(lǐng)

文檔簡介

人教選二Unit1Scienceandscientistslearnthewordsinthepassage

SincethesevereCOVID-19brokeout,manypeopleallovertheworldhavebeeninfected.Chineseoutstanding,giftedandpatrioticspecialistsinepidemiologyandtheirassistantshavebeeninchargeoftracingthesourceofthevirusinordertodefendmorepeoplefrombeingkilled.Theydesiredtoproducevaccinetohandlethedeadlydiseaseonceandforall.Initially,withconcrete

proofcollected,theysuspectedthatwildbatsweretoblame.Butbyobservaingtheviruswithmicroscopes,theygatheredsolidandmultiple

statisticsandmasteredtheframeworkofthevirus,whichgraduallytransformedtheirintialcontradictory

thinking.Allthefindingsmadethemsuscribetotheideathattheviruswasnotdirectlylinkedtothebats,whichmadethebrilliantexpertsfrustrated.Thisalsocastashadowontheexperts,sotheyhadtoshifttowardshowtopreventthevirusfromspreadingamongpeople.Lastbutnotleast,whatweshoulddoisthatwemustwearmasksoutdoors.Thankstotheseinterventions,thethreatofCOVID-19inChinasawasusbtantial

decrease.Whatwehaveexperiencedhastaughtustoleadahealthylifesuchasdrinkingpureorboiledwaterandavoidingrawfood.Inconclusion,underourmotherland`sleadership,wehaveachievedsteadysuccess,tearsofhappinesspouringdownourcheeks.practiceagain1cholera2diarrhoea3dehydration4contradictory5germ6pump7waterpump8household9raw10statistic11epdemiology12microscope13protein14cell15virus16vaccine17framework18theoreticalframework19rainbow20concrete21plasma22aerospace23patriotic24mechanical25mechanic26aviation27jet28missile29astronomy30telescope31severe32idiom33ignore34initial35solid36shadow37subscribe38suspect39blame40handle41link42substantial43decrease44transform45thinking46finding47cast48pour49leadership50immigration51impression52incorrect53import54illegal55immediately56trace57outstanding58abstract59concept60besides61brilliant62furthermore63fault64shift65frustrated66infection67infectious68frustrate69defend70proof71prove72intervention73multiple74multiply75intervene76assistant77gifted78steady79vivid80onceandforall81subscribeto82thanksto83breakout84inchargeofInthelabexperiment,volunteersexposedasmallpatchofskinontheirarmorhandtoroughly100mosquitoesforfiveminutesatatime.Researcherstestedthreedifferentsituations:volunteerswearingnoprotection,wearingcheesecloth(薄紗棉布）,orwearingcheeseclothplusathingraphenelayerunderit.

Avideocamerawasthenusedtorecordandquantifymosquitoes`behavior,includingwhethertheylandedontheskin,howlongtheystayedthere,andwhethertheybegantosuckblood.Thenumberofbiteseachvolunteergotwasalsocalculatedbasedonhowmanyswellingsdevelopedontheirskinafterwards.Finally,researchersdroppedalittlewaterorsweatontopofthegraphenelayerandstudiedtheconsequence,andtheyalsotestedaslightlydifferentgraphenelayercalled“reducedgraphene.”

Asaresult,thenumberofmostuitobitesonnakedskinwasthehighest,about16onaverage;skinonlyprotectedbycheeseclothgotthesecond,approximately10perfiveminutes`exposure.Theexcitingfindingwasthattherewasnoswellingdevelopingonskincoveredbythethingraphenelayerundercheesecloth,whichmeansthematerialiseffectiveatpreventingmosquitobites.Themosquitoeslandedonskintotallyuncoveredorcoveredincheeseclothabout23timesonaverage,andstayedforonetotwominutes.Comparatively,themosquitoeslandedonskincoveredinthegraphenelayerfewerthan10times,andthelengthoftheirstaywasmuchshorter.Besides,waterorsweatcanruinthegraphenelayer,whichallowsmosquitoestobitethroughit.Butfortunately,thenumberofmosquitobitesineitherdryorwetconditionscanbeloweredaslongasthegraphenematerialisimprovedtocertainextent.1Whydidresearchersconducttheexperiment?ATorecordthebehaviorofmosquitoesBTofindasubstancetopreventmosquitobites.CTofindasolutiontostopinfectiousdiseases.DTotestgraphene`seffectivenessinpreventingmosquitobites.2Whatwastheproblemwhenwaterandsweatwasappliedtographene?AIthadnoeffectongraphene.BItsli

溫馨提示

  • 1. 本站所有資源如無特殊說明，都需要本地電腦安裝OFFICE2007和PDF閱讀器。圖紙軟件為CAD,CAXA,PROE,UG,SolidWorks等.壓縮文件請下載最新的WinRAR軟件解壓。
  • 2. 本站的文檔不包含任何第三方提供的附件圖紙等，如果需要附件，請聯(lián)系上傳者。文件的所有權(quán)益歸上傳用戶所有。
  • 3. 本站RAR壓縮包中若帶圖紙，網(wǎng)頁內(nèi)容里面會有圖紙預(yù)覽，若沒有圖紙預(yù)覽就沒有圖紙。
  • 4. 未經(jīng)權(quán)益所有人同意不得將文件中的內(nèi)容挪作商業(yè)或盈利用途。
  • 5. 人人文庫網(wǎng)僅提供信息存儲空間，僅對用戶上傳內(nèi)容的表現(xiàn)方式做保護處理，對用戶上傳分享的文檔內(nèi)容本身不做任何修改或編輯，并不能對任何下載內(nèi)容負(fù)責(zé)。
  • 6. 下載文件中如有侵權(quán)或不適當(dāng)內(nèi)容，請與我們聯(lián)系，我們立即糾正。
  • 7. 本站不保證下載資源的準(zhǔn)確性、安全性和完整性, 同時也不承擔(dān)用戶因使用這些下載資源對自己和他人造成任何形式的傷害或損失。

評論

0/150

提交評論