电大开放大学理工英语1 单元检测3

一、选择填空：阅读下面的对话或句子，从A、B、C三个选项中选出一个 C.That'sgood2.----whynotdineouttogetherandgotothemovies? C.Thankyou.3.PeoplewhodonothavewoodmustspendlargeamountsofmoneyBcookingfuel.A.inC.of__4.LiLeiisCstudentinour__C.thetallest5.NickCajobinabank,buttooursurprise,hedidn'ttakeit.A.offered二、阅读理解：阅读下面的短文，根据文章内容从A、B、C三个选项中选出一个最佳选项。WhenDr.RobertMetcalffirstusedasolarcooker,thefuturechangedformillionsofAfricans.Heknewthatbillionsofpoorpeoplearoundtheworlddependontheuseofwoodforcooking.Astheytakemoreandmorefirewoodfromwildareas.Theyaredestroyinghabitatsaroundtheworld.Woodcollectionisonereasonwhymanyanimalshavebecomeendangered."Butsunshinecanbeanalternativetofire."Dr.Metcalfsays.Sincehisfirstsolarcookedmeal,hehashelpedpeoplearoundtheworldtousesimplenewtechnologiestocooktheirfood.EachmorninginvillagesacrossEastAfrica,smallchildrenandtheirmotherswakeupandwalkseveralmilestocollectfirewoodtocooktheirfood.Ittakesmuchoftheday,andtheheavyfirewoodtheycarryhomeontheirheadslastsonlyafewdays.ThisiswhyDr.MetcalfspendseachsummerinAfrica.Heteacheswomenandchildreninvillageshowtocookwiththesun.Sofar,morethanthirtythousandAfricanfamiliesnowhavesolarcookers,andnewprogramswillintroducesolarcookerstomillionsoffamilies.Tofindwater,womenandchildrenmayhavetowalklongdistancetodigholesindryriverbedsortogatherwaterfromstreamsandshallowwells.bucketsoftenweighasmuchasfortypounds.Notonlyisfindingwaterhardwork,butthewaterisoftenpollutedwithgerms(细菌)thatmakepeoplesick.Dr.Metcalfandothersdevelopedasimple,reusabletoolthatpeoplecanusetomakesuretheirwaterissafetodrink.ThetooliscalkedaWAPI,whichstandsfor"WaterPasteurizationIndicator".ThepasteurizationprocessisnamedafterLouisPasteur,whodevelopeditinthe1800s.1.WhydidMetcalfhelpAfricansusesolarcookers?CA.Hewantedtohelpthemtofightpoverty.B.Hefounditadangerousjobtocollectfirewood.C.Herealizedusingfirewoodisnotgoodfortheenvironment.2.Theunderlinedword"it"inthethirdparagraphprobablyrefersto"AA.collectingfirewoodB.cookingfoodC.cookingwiththesunA.doresearchonwaterB.takecareofsickpeopleC.spreadthetechniqueofusingsolarcookers4.WaterPasteurizationIndicatorwasdevelopedtoA.A.killthebacteriainwaterB.honorLouisPasteurC.makewastewaterreusable5.ItcanbeinferredfromtilepassagethatBA.Africansfindithard