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用经过处理后的鸡粪沼液来培养小球藻，以降低沼液中的氨氮、总磷等含量．下列叙述正确的是（ ）
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高三下学期生物《》真题及答案
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科学家往小球藻培养液中通入14CO2后分别给予三组小球藻不同时间的光照结果如下表.根据上述实验结果分
本实验利用小球藻研究的是光合作用的光反应阶段
每组照光后需将小球藻进行处理使酶失活，才能测定放射性物质分布
CO
2
进入叶绿体后，最初形成的主要物质是12种磷酸化糖类
实验结果说明光合作用产生的有机物还包括氨基酸、有机酸等
以小球藻为材料做下列两组实验根据实验回答下列问题实验一小球藻在适宜条件下进行光合作用而繁殖很快在相同
某实验小组用小球藻进行实验探究影响光合速率的因素他们将一定量的小球藻浸入适宜且相同温度的培养液的试管
分析回答有关生物进化及多样性问题1生物a为现今仅存于某个海岛上的一种昆虫其翅的强健程度用T.来表示最
CO2是光合作用碳反应过程图甲的原料实验探究CO2浓度对某种小球藻生长的影响如图乙请回答1图甲中NA
创新题1999年11月21日我国载人航天飞机神舟号首次试飞成功这标志着我国的航天技术已居世界领先地位
小球藻有较厚的不易被鱼虾幼体所消化很少直接用于投喂鱼虾贝的幼体小球藻通常用于培养也广泛用于鱼类和甲壳
日光中的紫外线B波段UV-B大部分被臭氧层吸收臭氧层减薄会导致照射到地表的UV-B辐射增加小球藻是一
小球藻可用于污水净化其繁殖能力生长量在一定程度上可以反映藻细胞消耗N.P.等的能力科研人员比较游离小
本研究中固定化小球藻采用的方法是包埋法
实验中可用CaCl
2
浸泡凝胶珠使其形成稳定结构
结果表明固定化小球藻的生长期较短、生长速率低
使用固定化小球藻有利于重复使用且可避免水体二次污染
下图示与光合作用细胞呼吸等相关的细胞代谢问题请回答1图甲中所示的①～④物质中相当于细胞有氧呼吸的终产
科研人员以某种小球藻单细胞绿藻为实验材料进行了下面的实验甲和实验乙请据图回答实验甲以相同培养液和同样
沼液浸种利用的是沼液中和营养组分
生物活性物质
水分
氮
金属离子
某人利用小球藻为实验材料做了下列两组实验分析实验并回答下列问题1实验一小球藻在适宜条件下繁殖很快在相
小球藻可用于污水净化其繁殖能力生长量在一定程度上可以反映藻细胞消耗N.P.等的能力.科研人员比较游离
本研究中固定化小球藻采用的方法是包埋法
实验中可用CaCl
2
浸泡凝胶珠使其形成稳定结构
结果表明固定化小球藻的生长期较短、生长速率低
使用固定化小球藻有利于重复使用且可避免水体二次污染
回答下列I.II题I..15分日光中的紫外线B.波段UV—B.大部分被臭氧层吸收臭氧层减薄会导致照射
12分某人用小球藻为实验材料做了如图15所示的两组实验分析实验并回答下列问题1实验一小球藻在适宜的条
用经过处理后的鸡粪沼液来培养小球藻以降低沼液中的氨氮总磷等有机物和无机物含量使其达到国家排放标准．下
鸡粪便中所含的能量属于鸡未摄入的能量
此生态系统中，小球藻既是生产者，又是分解者
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小球藻制造有机物时所需要能量来自鸡粪沼液
日光中的紫外线B.波段UV—B.大部分被臭氧层吸收臭氧层减薄会导致照射到地表的UV—B.辐射增加小球
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某人利用小球藻为实验材料做了下列两组实验分析实验并回答下列问题1实验一小球藻在适宜条件下繁殖很快在相
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AfterschoolonFridayIwaitedattheschoolgatetowalkhomewithJemmaasusual.ThenIsaw1talkingandlaughinghappilywithsomeothergirls.Sheglanced瞥了一眼atmeandleftmealonethere.IknewrightthenthatIhad2mybestfriend. AtdinnerMomaskedIsJemmacomingbytomorrow? Ishrugged耸肩andsaidnothing. ThenextmorningMomaskedTodayis3.WhatareyouandJemmagoingtodo?Ishruggedagain.4isJemma? Momtookalookatme.ThenshesaidWillyoutakethesemagazinestoGrandmaplease? 5Iwalkeddownthestreetanewgirlintheneighborhoodcametowardsmesmiling.ButIjustwent6her. Grandmawelcomedmeatthedoorwithawarmhug. SittingonthesofaInoticedaan7ofkidsinold﹣fashionedclothesonthetable.Grandmapointedatagirlwithshortfairhair. That'sBethLambertshesaidMybestfriend.Untilaweekbeforewetookthisphoto.Iwas8atthat. BethandIwerebestfriendsinschool.Wedideverything9.Thenonedayshemadenewfriendsandsaidshedidn'twanttohangoutwithmeanymore.Nothinghurt10that. Ididn'tsayanything.Icouldn't.IknewI'dstart11ifIopenedmymouth. Grandmahuggedmeagain.Simonesometimesfriendsgrow12.Itmighthappentoanyoneshecontinued.Thenseehim?Grandma'sfinger13toaboywithglassesinthephoto.Helivednearme.WhenIwaswalkinghomebymyself14thisboywastooIsaid'hello'.Andwebecamefriends. Soifwewanttostartanewfriendshipshesmiled.One15isallittook. AsIwasheadinghomethatnewgirlappearedagain.IwenttowardsherandspokeHello. 1A.it B.them C.her D.him 2A.lost B.hurt C.forgotten D.beaten 3A.Monday B.Friday C.Saturday D.Sunday 4A.How B.Where C.Which D.Who 5A.As B.Before C.After D.Until 6A.to B.past C.with D.against 7A.card B.photo C.poster D.advertisement 8A.glad B.angry C.satisfied D.surprised 9A.together B.outside C.differently D.quickly 10A.lessthan B.becauseof C.morethan D.insteadof 11A.singing B.laughing C.shouting D.crying 12A.old B.separate C.strong D.close 13A.moved B.connected C.returned D.waved 14A.so B.but C.for D.and 15A.hug B.smile C.word D.question
在“探究杠杆的平衡条件”实验中实验前将杠杆中点置于支架上当杠杆静止时发现杠杆右端下沉．此时应把杠杆两端的平衡螺母向选填“左”或“右”调节使杠杆在不挂钩码时在水平位置目的是避免对实验的影响．杠杆平衡后小英同学在如图甲所示的A位置挂上两个钩码可在B位置挂上 个钩码使杠杆在水平位置平衡．用刻度尺测出OB的长度如图乙为cm．
Convincingpeoplethatyourwayisthebestwayisoftenverydifficult﹣﹣﹣especiallywhenyou'renotquitesurewhythey'resayingno.Turnthetablesonyourconversationandconvincepeopleofyourpointofview.1Andwiththerightmethodsyoucandoit. 1.2Knowinghowtopersuadepeopleisn'tjustinwordsandbodylanguage﹣it'salsoinknowingtherighttimetotalktothem.Ifyouapproachpeoplewhentheyaremorerelaxedandopentodiscussionyouwillmostlikelyachievefasterbetterresults. 2.Talkfast.Peoplearemorepersuadedbyafastconfidenttalkerthanaccuracy.Sortofmakessense﹣thefasteryoutalkthelesstimeyourlistenerhastoprocesswhatyou'vesaidandquestionit.3 3.Gettoknowthem.Alargepartofwhetherornotpersuasioniseffectiveisbasedonthegeneralunderstandingbetweenyouandyourson/friend/employee.Ifyoudon'tknowthepersonwellit'snecessarytostartbuildingthisunderstandingimmediately﹣findcommongroundassoonaspossible.4Sofindparallelsandmakethemknown. 4.5Thereissomethingtobesaidforclarity.Ifyou'reconfusingthepersonmaywanttoagreewithyoubutdoesn'tnecessarilyknowwhatyou'relookingfor.Speakinginafirmwaywillhelpyoumaintaindirectnessandkeepyourintentionsclear. A.Speakfirmly. B.Understandthebesttime. C.Talkaboutwhatintereststhem. D.Thetrickistogetthemwonderingwhythey'resayingno. E.Thusyoucreatethefeelingthatyoutrulygraspthesubject. F.Ifsomeonetalksfastit'stheperfecttimetopersuadehim. G.Humaningeneralfeelsaferaroundpeoplethataresimilartothem.
如图所示矿泉水瓶的总质量为500g用手握住竖直的矿泉水瓶不动瓶受到的摩擦力方向大小为Ng取10N/kg如果增大握力则瓶子受到的摩擦力选填“变小”“变大”或“不变”
OnMarch102019eight﹣year﹣oldTaniwontheNewYorkChessChampionship纽约象棋冠军赛ofhisagegroup.Buttheboywhowashomelessatthetimebeganlearningthegamelessthanayearago. TaniandhisfamilyarrivedinNewYorkCityfromAfricain2017.AchurchhelpedhimentertheprimaryschoolP.S.116.Herethegiftedboywasfirstintroducedtochessbyapart﹣timeteacherMakofskyownerofachessclub.Interestedinthegametheseven﹣year﹣oldaskedhismothertoallowhimtojointheclub.NotabletoaffordthechessclassessheemailedMakofsky.TohersurpriseandjoyMakofskyagreedthatTanicouldlearnitforfree. Thoughthechessclubhelpsit'slargelybelievedthatTani'ssuccessliesinhishardwork.Theboypracticesthegameformanyhoursadayonthefloorwithhisboard.EverySaturdayTanigoestoafree3﹣hourclasstoimprovehisgameskills. NotsurprisinglyTani'sstoryfirstreportedbyTheNewYorkTimeshasbroughthimgreatsupportfromtheAmericanpublic.SoonaftertheyoungboywontheNewYorkChampionshipMakofskybeganaGoFundMeactivityforTaniandhisfamilysothathecouldcontinuehischessjourney.Itraised$200000injusttendaysfarmorethantheyexpected.Andthemoneykeepscoming.Butthefamilydonates捐赠mostofthemoneytothechurchandtothosepoorfamilies! TanihasalsoreceivedoffersfromthreefamousprivateschoolsinNewYork.HoweverthefamilyhavepolitelyrefusedallofthemandchosentocontinueTani'seducationatP.S.116. Theyoungboy'sstoryalsocaughttheeyeofBillClintonthe42ndUSPresident.Taniyou'reanexampleofawinningspirit﹣inchessandinlife.I'dlovetomeetyouhesaidonhisFacebook. WhileexcitedabouthisnewlifeTaniisreadytomeetgreatchallenges挑战.Heisbusypreparingforthe2019NationalPrimaryChampionships.Winningthecompetitionwillbringthechessplayerclosertohisdreamofbecomingtheworld'syoungestchessgrandmaster大师.Therecordhasbeenkeptfor17yearsbytheRussianchessplayerKarjakinwhowonthetitleattheageof12. 1Tanibegantolearnchessattheageof. A.seven B.eight C.nine D.twelve 2Paragraph3ismainlyabout. A.whereTanipractiseschess B.howhardTaniworksatchess C.whatTani'smotherdoesforhim D.howmuchthechessclubhelps 3AfterwinningtheNewYorkChampionshipTani. A.hopedtoseeBillClinton B.wenttoafamousprivateschool C.becametherichestboyinNewYork D.gotmuchsupportfromthesociety 4ThewritermentionstheRussianchessplayerKarjakinto. A.callonyoungpeopletolearnchess B.introducehisgreatachievementsinchess C.showit'sabigchallengeforTanitorealizehisdream D.tellpeopleTanihasbeentheworld'sbestchessplayer
BrandonForestParkisaplaceofinterest.Thislargewoodlandishometomanybirdsandotherwildlife.It'sopenallyearroundtovisitors. InthecentreoftheparkistheForestShopandCafe.Youcanbuymapsintheshopandthereareallkindsofgiftsandsouvenirsonsaleaswell. TheCafeisopenfrom9a.m.to7p.m.onSaturdayandSunday.Itisopenfrom9a.m.to3p.m.fromMondaytoFriday.ButonWednesdayit'sshutallday. There'salsoalargeareaforvisitorstoenjoyapicniclunch.Butpleasedon'tthrowrubbish. Bicyclesareforhire租用.Foranhouritcosts﹩3.5andforhalfadayit's﹩9.79. Specialeventsareheldattheparkduringthesummer.There'sgoingtobeanoutdoorplayaconcertandahorse﹣ridingracethissummer. Moreinformationabouttheparkcanbefoundonourwebsitewww.brandonforestpark.com.
根据磁感线方向标出小磁针静止时的N极和S极以及电源的“+”“﹣”极接线柱．
现如今的大街小巷不管是商店里还是公交车上不管你在等车还是在用餐就连走路的人群里都能看到这样的人他们齐刷刷低头盯着屏幕手里拿着手机iPad玩游戏看视频刷微博发微信…这就是“手机依赖症的表现他们被称为“低头族”． 1如图甲所示用相机拍照时在芯片上所成的像是倒立的缩小的像选填“实”或“虚”．镜头靠近人时像的大小将变此时像会透镜选填“靠近”或“远离“．用相机拍摄远近不同的物体时通过伸缩镜头使像清晰地成在芯片上这个操作过程便是“调焦”如图乙所示． 2小敏同学发现手机不能“调焦”但成像也基本清晰她将手机拿到哥哥工作的大学实验室去探究实验数据如下表根据表中数据判断手机镜头的焦距大约为． A5m B0.5m C0.05m D0.005m 3手机拍摄远近不同的物体不需要“调焦”的原因是因为手机镜头焦距较拍摄时物距都远大于2倍焦距像距变化的范围比较所以不需要“调焦”．均选填“大或“小”
BrandonForestParkisaplaceofinterest.Thislargewoodlandishometomanybirdsandotherwildlife.It'sopenallyearroundtovisitors. InthecentreoftheparkistheForestShopandCafe.Youcanbuymapsintheshopandthereareallkindsofgiftsandsouvenirsonsaleaswell. TheCafeisopenfrom9a.m.to7p.m.onSaturdayandSunday.Itisopenfrom9a.m.to3p.m.fromMondaytoFriday.ButonWednesdayit'sshutallday. There'salsoalargeareaforvisitorstoenjoyapicniclunch.Butpleasedon'tthrowrubbish. Bicyclesareforhire租用.Foranhouritcosts﹩3.5andforhalfadayit's﹩9.79. Specialeventsareheldattheparkduringthesummer.There'sgoingtobeanoutdoorplayaconcertandahorse﹣ridingracethissummer. Moreinformationabouttheparkcanbefoundonourwebsitewww.brandonforestpark.com.
OnMarch102019eight﹣year﹣oldTaniwontheNewYorkChessChampionship纽约象棋冠军赛ofhisagegroup.Buttheboywhowashomelessatthetimebeganlearningthegamelessthanayearago. TaniandhisfamilyarrivedinNewYorkCityfromAfricain2017.AchurchhelpedhimentertheprimaryschoolP.S.116.Herethegiftedboywasfirstintroducedtochessbyapart﹣timeteacherMakofskyownerofachessclub.Interestedinthegametheseven﹣year﹣oldaskedhismothertoallowhimtojointheclub.NotabletoaffordthechessclassessheemailedMakofsky.TohersurpriseandjoyMakofskyagreedthatTanicouldlearnitforfree. Thoughthechessclubhelpsit'slargelybelievedthatTani'ssuccessliesinhishardwork.Theboypracticesthegameformanyhoursadayonthefloorwithhisboard.EverySaturdayTanigoestoafree3﹣hourclasstoimprovehisgameskills. NotsurprisinglyTani'sstoryfirstreportedbyTheNewYorkTimeshasbroughthimgreatsupportfromtheAmericanpublic.SoonaftertheyoungboywontheNewYorkChampionshipMakofskybeganaGoFundMeactivityforTaniandhisfamilysothathecouldcontinuehischessjourney.Itraised$200000injusttendaysfarmorethantheyexpected.Andthemoneykeepscoming.Butthefamilydonates捐赠mostofthemoneytothechurchandtothosepoorfamilies! TanihasalsoreceivedoffersfromthreefamousprivateschoolsinNewYork.HoweverthefamilyhavepolitelyrefusedallofthemandchosentocontinueTani'seducationatP.S.116. Theyoungboy'sstoryalsocaughttheeyeofBillClintonthe42ndUSPresident.Taniyou'reanexampleofawinningspirit﹣inchessandinlife.I'dlovetomeetyouhesaidonhisFacebook. WhileexcitedabouthisnewlifeTaniisreadytomeetgreatchallenges挑战.Heisbusypreparingforthe2019NationalPrimaryChampionships.Winningthecompetitionwillbringthechessplayerclosertohisdreamofbecomingtheworld'syoungestchessgrandmaster大师.Therecordhasbeenkeptfor17yearsbytheRussianchessplayerKarjakinwhowonthetitleattheageof12. 1Tanibegantolearnchessattheageof. A.seven B.eight C.nine D.twelve 2Paragraph3ismainlyabout. A.whereTanipractiseschess B.howhardTaniworksatchess C.whatTani'smotherdoesforhim D.howmuchthechessclubhelps 3AfterwinningtheNewYorkChampionshipTani. A.hopedtoseeBillClinton B.wenttoafamousprivateschool C.becametherichestboyinNewYork D.gotmuchsupportfromthesociety 4ThewritermentionstheRussianchessplayerKarjakinto. A.callonyoungpeopletolearnchess B.introducehisgreatachievementsinchess C.showit'sabigchallengeforTanitorealizehisdream D.tellpeopleTanihasbeentheworld'sbestchessplayer
AfterschoolonFridayIwaitedattheschoolgatetowalkhomewithJemmaasusual.ThenIsaw1talkingandlaughinghappilywithsomeothergirls.Sheglanced瞥了一眼atmeandleftmealonethere.IknewrightthenthatIhad2mybestfriend. AtdinnerMomaskedIsJemmacomingbytomorrow? Ishrugged耸肩andsaidnothing. ThenextmorningMomaskedTodayis3.WhatareyouandJemmagoingtodo?Ishruggedagain.4isJemma? Momtookalookatme.ThenshesaidWillyoutakethesemagazinestoGrandmaplease? 5Iwalkeddownthestreetanewgirlintheneighborhoodcametowardsmesmiling.ButIjustwent6her. Grandmawelcomedmeatthedoorwithawarmhug. SittingonthesofaInoticedaan7ofkidsinold﹣fashionedclothesonthetable.Grandmapointedatagirlwithshortfairhair. That'sBethLambertshesaidMybestfriend.Untilaweekbeforewetookthisphoto.Iwas8atthat. BethandIwerebestfriendsinschool.Wedideverything9.Thenonedayshemadenewfriendsandsaidshedidn'twanttohangoutwithmeanymore.Nothinghurt10that. Ididn'tsayanything.Icouldn't.IknewI'dstart11ifIopenedmymouth. Grandmahuggedmeagain.Simonesometimesfriendsgrow12.Itmighthappentoanyoneshecontinued.Thenseehim?Grandma'sfinger13toaboywithglassesinthephoto.Helivednearme.WhenIwaswalkinghomebymyself14thisboywastooIsaid'hello'.Andwebecamefriends. Soifwewanttostartanewfriendshipshesmiled.One15isallittook. AsIwasheadinghomethatnewgirlappearedagain.IwenttowardsherandspokeHello. 1A.it B.them C.her D.him 2A.lost B.hurt C.forgotten D.beaten 3A.Monday B.Friday C.Saturday D.Sunday 4A.How B.Where C.Which D.Who 5A.As B.Before C.After D.Until 6A.to B.past C.with D.against 7A.card B.photo C.poster D.advertisement 8A.glad B.angry C.satisfied D.surprised 9A.together B.outside C.differently D.quickly 10A.lessthan B.becauseof C.morethan D.insteadof 11A.singing B.laughing C.shouting D.crying 12A.old B.separate C.strong D.close 13A.moved B.connected C.returned D.waved 14A.so B.but C.for D.and 15A.hug B.smile C.word D.question
ItwasDay1ofourvacationonCortesabeautifulquietisland.iPhoneiPhoneiPhonemysonkeptmoaning呻吟.Infrontofhimwasabigwindowfacingtheblueocean.Andacoolgentlewindwascominginfromthedoor.Clearlyhesawandfeltnoneofit. BackathomeI'dsoongiveupandhandthephoneovertohimafterfiveminutesoflisteningtothiskindofmoaning. ButnothereBeforeweleftIhadtoldmy10﹣year﹣oldsontherule一noemailsnoFacebooknovideogamesandnoiPhone.Wecameheretogetawayfromthemall.Herewewereonourfirstdayandalreadyhecouldn'tstandit. ▲Iwalkeddownthegrassroadtothebeachandlookedouttothesea.My6﹣year﹣olddaughterandmyhusbandweredrawingonpiecesofwood.Theyweredoingjustfine. OnDay2wespentthewholemorningdiggingforshells贝壳.Thistimemysonjoinedus.Hecollectedshellfishandotherseatreasures.WhenwegotbacktoourlittlewoodhouseIgavemysonabookandputhimonthelovelygardenchair.Itwasalmostdinnerwhenhelookedup. Thenextfewdayspassedinpeace. OnDay6mysonwaslyingbesidemeonthebeachwatchingthesungoingdown.Hewasplayingwiththesand.Andtherewassomethingshininginhiseyes.Irealizedhowtimesloweddownforbothofus.ItwasexactlywhatIwanted.Finallywewereabletositquietlywithoutthinkingaboutscreensphonecallsande﹣mail. Aweekawayfromalltheelectronicsandlifeisgood. 1Whatisthespecialruleforthewriter'svacation? A.Theycouldn'tusetheirelectronics. B.Theymustkeepquietandstayinthehouse. C.Theyhadtospendtheirvacationonanisland. D.Theyshouldcollectasmanyshellsaspossible. 2Whichofthefollowingcanbeputin▲''inParagraph4? A.Ifeltreallytiredandwenttobed. B.Iclosedthedoorandstayedwithhim. C.Ijustwalkedoutsidetoleavehimalone. D.IgavehimhisiPhoneandlethimstayinside. 3Thechangeoftheson'sfeelingscanbedescribedas. A.angry→surprised→proud B.excited→peaceful→bored C.worried→angry→hopeful D.bored→peaceful→pleased 4Thebesttitleforthepassagecanbe. A.ATerribleLifeontheIsland B.ASpecialiPhoneforMySon C.AFightbetweenMotherandSon D.AVacationAwayfromElectronics
有两个电路元件A和B把它们串联在电路中如图甲所示流过元件的电流与其两端电压的关系如图乙所示．闭合开关S电流表的示数为0.4A则电源电压和元件B的电功率分别是
假如你叫李华.来自美国的同班同学Tom生病了在家复习应考.以下是学校关于英语期末考试的通知请根据该通知写一份100左右的e﹣mail给Tom告诉他考试的情况. NoticeontheEnglishFinalExam 注意 1.开头已写好不计入总词数 2.生词研究性课程researchwork分数grade DearTom It'sapitythatyoucan'tgooveryourlessonswithus. Yours LiHua
ItwasDay1ofourvacationonCortesabeautifulquietisland.iPhoneiPhoneiPhonemysonkeptmoaning呻吟.Infrontofhimwasabigwindowfacingtheblueocean.Andacoolgentlewindwascominginfromthedoor.Clearlyhesawandfeltnoneofit. BackathomeI'dsoongiveupandhandthephoneovertohimafterfiveminutesoflisteningtothiskindofmoaning. ButnothereBeforeweleftIhadtoldmy10﹣year﹣oldsontherule一noemailsnoFacebooknovideogamesandnoiPhone.Wecameheretogetawayfromthemall.Herewewereonourfirstdayandalreadyhecouldn'tstandit. ▲Iwalkeddownthegrassroadtothebeachandlookedouttothesea.My6﹣year﹣olddaughterandmyhusbandweredrawingonpiecesofwood.Theyweredoingjustfine. OnDay2wespentthewholemorningdiggingforshells贝壳.Thistimemysonjoinedus.Hecollectedshellfishandotherseatreasures.WhenwegotbacktoourlittlewoodhouseIgavemysonabookandputhimonthelovelygardenchair.Itwasalmostdinnerwhenhelookedup. Thenextfewdayspassedinpeace. OnDay6mysonwaslyingbesidemeonthebeachwatchingthesungoingdown.Hewasplayingwiththesand.Andtherewassomethingshininginhiseyes.Irealizedhowtimesloweddownforbothofus.ItwasexactlywhatIwanted.Finallywewereabletositquietlywithoutthinkingaboutscreensphonecallsande﹣mail. Aweekawayfromalltheelectronicsandlifeisgood. 1Whatisthespecialruleforthewriter'svacation? A.Theycouldn'tusetheirelectronics. B.Theymustkeepquietandstayinthehouse. C.Theyhadtospendtheirvacationonanisland. D.Theyshouldcollectasmanyshellsaspossible. 2Whichofthefollowingcanbeputin▲''inParagraph4? A.Ifeltreallytiredandwenttobed. B.Iclosedthedoorandstayedwithhim. C.Ijustwalkedoutsidetoleavehimalone. D.IgavehimhisiPhoneandlethimstayinside. 3Thechangeoftheson'sfeelingscanbedescribedas. A.angry→surprised→proud B.excited→peaceful→bored C.worried→angry→hopeful D.bored→peaceful→pleased 4Thebesttitleforthepassagecanbe. A.ATerribleLifeontheIsland B.ASpecialiPhoneforMySon C.AFightbetweenMotherandSon D.AVacationAwayfromElectronics
表是某电热饮水机的铭牌数据其电路原理图如图所示．该电热饮水机有加热和保温两种工作状态由机内温控开关S0自动控制．求 1当开关S闭合S0断开时饮水机的功率是多大 2电阻R2的阻值是多少 3若正常工作时电热器加热的效率为90%将一满热水箱的水从20℃加热至80℃需要多长时间[c水＝4.2×103J/kg•℃ρ水＝1.0×103kg/m3]．
踢出的足球在水平草地上继续滚动一段距离才停止下来请作出向右滚动的足球所受各力的示意图．
WJack.howhaveyourtwosonsbeendoingatschoolrecently? MDon'task!MarkneverstartsstudyingandJasonneverstops1study. WYou'rejoking!IhearthatJasonislikely2beatthetopofhisclassafterexamthisyear. MYessohisteachersay.He'sbeen3workveryhardathisbookseveryeveningformonthsonendrecently.Heishopingto4HarvardUniversity. WGreat.Maybehe'llbecomeauniversityprofessor5heinthefuture. MMaybe.ButsometimesIwishhe'dgooutandenjoyhimself6achange. WYes…Whatabouttheyoungerone? MWellMark'steacherssayhehasabililtybuthe7raredoeshisbest.Hedoeshishomeworkintenminuteseverydayandthen8rushouttoplayfootball. WPerhapshecanmakehisfortuneatfootball.Peoplecanmake9plentyofmoneyfromsportsnow. MMywifealwaysworriesabouttheirfuture WPerhapsyoucanhaveatalkwithhimnowtofindout10heisthinkingabouthisstudiesandfutureplans. MGoodidea.I'lltakeyouradvice.
OnMarch102019eight﹣year﹣oldTaniwontheNewYorkChessChampionship纽约象棋冠军赛ofhisagegroup.Buttheboywhowashomelessatthetimebeganlearningthegamelessthanayearago. TaniandhisfamilyarrivedinNewYorkCityfromAfricain2017.AchurchhelpedhimentertheprimaryschoolP.S.116.Herethegiftedboywasfirstintroducedtochessbyapart﹣timeteacherMakofskyownerofachessclub.Interestedinthegametheseven﹣year﹣oldaskedhismothertoallowhimtojointheclub.NotabletoaffordthechessclassessheemailedMakofsky.TohersurpriseandjoyMakofskyagreedthatTanicouldlearnitforfree. Thoughthechessclubhelpsit'slargelybelievedthatTani'ssuccessliesinhishardwork.Theboypracticesthegameformanyhoursadayonthefloorwithhisboard.EverySaturdayTanigoestoafree3﹣hourclasstoimprovehisgameskills. NotsurprisinglyTani'sstoryfirstreportedbyTheNewYorkTimeshasbroughthimgreatsupportfromtheAmericanpublic.SoonaftertheyoungboywontheNewYorkChampionshipMakofskybeganaGoFundMeactivityforTaniandhisfamilysothathecouldcontinuehischessjourney.Itraised$200000injusttendaysfarmorethantheyexpected.Andthemoneykeepscoming.Butthefamilydonates捐赠mostofthemoneytothechurchandtothosepoorfamilies! TanihasalsoreceivedoffersfromthreefamousprivateschoolsinNewYork.HoweverthefamilyhavepolitelyrefusedallofthemandchosentocontinueTani'seducationatP.S.116. Theyoungboy'sstoryalsocaughttheeyeofBillClintonthe42ndUSPresident.Taniyou'reanexampleofawinningspirit﹣inchessandinlife.I'dlovetomeetyouhesaidonhisFacebook. WhileexcitedabouthisnewlifeTaniisreadytomeetgreatchallenges挑战.Heisbusypreparingforthe2019NationalPrimaryChampionships.Winningthecompetitionwillbringthechessplayerclosertohisdreamofbecomingtheworld'syoungestchessgrandmaster大师.Therecordhasbeenkeptfor17yearsbytheRussianchessplayerKarjakinwhowonthetitleattheageof12. 1Tanibegantolearnchessattheageof. A.seven B.eight C.nine D.twelve 2Paragraph3ismainlyabout. A.whereTanipractiseschess B.howhardTaniworksatchess C.whatTani'smotherdoesforhim D.howmuchthechessclubhelps 3AfterwinningtheNewYorkChampionshipTani. A.hopedtoseeBillClinton B.wenttoafamousprivateschool C.becametherichestboyinNewYork D.gotmuchsupportfromthesociety 4ThewritermentionstheRussianchessplayerKarjakinto. A.callonyoungpeopletolearnchess B.introducehisgreatachievementsinchess C.showit'sabigchallengeforTanitorealizehisdream D.tellpeopleTanihasbeentheworld'sbestchessplayer
IthurtsmemorethanyouandThisisforyourowngood﹣thesearethestatementsmymotherusedtomakeyearsagowhenIhadtolearnLatincleanmyroomstayhomeanddohomework. Thatwasbeforeweenteredthepermissiveperiodineducationinwhichwedecideditwasallrightnottopushourchildrentoachievetheirbestinschool.Theschoolsandtheeducatorsmadeiteasyforus.Theytaughtthatitasallrighttobeparentswhotakealet﹣alonepolicy.Westoppedmakingourchildrendohomework.Wegavethemcalculatorsturnedonthetelevisionlefttheteachingtotheteachersandwentonvacation. Nowteachersfacedwithchildrenwhohavebeendevelopingattheirownpaceforthepast15yearsarerealizingwe'vemadeaterriblemistake.OnesuchteacherisSharonKlompuswhospeaksofherstudents﹣﹣﹣sopassiveandwonderswhathashappened.Nothingisdemandedofthemshebelieves.TelevisionsaysKlompusleadstochildren'spassivity.We'renottrainingkidstoworkanymoresaysKlompus.We'retalkingaboutagenerationofkidswho'veneverbeenhurtorhungry.Theyhavelearnedsomebodywillalwaysdoitforthem.Insteadofsaying'goandlookitup'youtellthemtheanswer.Ittakesgreaterenergytosaynotoakid. Yesitdoes.Ittakesenergyandittakeswork.It'stimeforparentstoendtheirvacationandcomebacktowork.It'stimetotakethecarawaytoturntheTVofftotellthemithurtsyoumorethanthembutit'sfortheirowngood.It'stimetostarttellingthemNoagain. 1Childrenarebecomingmoreinactiveinstudybecause. A.theyhavedonetoomuchhomework B.theywatchTVtoooften C.teachersaretoostrictwiththem D.theyhavetodotoomanyduties 2Themainideaofthepassageisthat. A.kidsshouldhavemoreactivitiesatschool B.parentsshouldalwayssetagoodexampletotheirkids C.parentsshouldleavetheirchildrenalone D.it'stimetobemorestrictwithourkids 3Bytheunderlinedwordspermissiveperiodineducationtheauthormeansatime A.wheneverychildcanbeeducated B.wheneverythingcanbetaughtatschool C.whenchildrenareallowedtodowhattheywishto D.whenchildrenarepermittedtoreceiveeducation 4Tosuchchildrenasdescribedinthepassage. A.itiseasiertosayyesthantosayno B.neitherisdifficult﹣tosayyesortosayno C.itiseasiertosaynothantosayyes D.neitheriseasy﹣tosayyesortosayno
IfyouaretiredofmakinghumanconnectionsLovetcanbeagreatchoiceforyou.AJapanesecompany1发明itinDecember2018.Itisafriendlyrobotwhichcanmake2孤独的peoplefeelthelove. The3名字Lovetcomesfromthetwowords﹣loveandrobot.Withtwobrighteyesanda4柔软的bodyLovetmovesaroundyourhouseandasksyouforhugs.Itdoesn'ttalkbutchirps作唧唧声. Lovetfollowsyouwiththehelpofa5照相机onitshead.Italsohasabilitiestotellwhoyouarebyreadingyourface.Itcan6甚至rememberupto1000faces. Therobotcannothelpyouwithhouseworkbutitwill7发展yourabilitytolove.Itmovesaroundonthreewheelsandwavesitstwolittle8手臂toshowsurpriseandloveortoaskforahug.Itsleepswhenit'shuggedanditfollowsyouwhenitiscalled.Itis9害羞的aroundstrangers.Whenyouopenthedooritwillhide10在…后面you.Ifyouwanttomakeitlaughjusttouchit. Lovetwilldoallitcantofillyouwithjoy.
BrandonForestParkisaplaceofinterest.Thislargewoodlandishometomanybirdsandotherwildlife.It'sopenallyearroundtovisitors. InthecentreoftheparkistheForestShopandCafe.Youcanbuymapsintheshopandthereareallkindsofgiftsandsouvenirsonsaleaswell. TheCafeisopenfrom9a.m.to7p.m.onSaturdayandSunday.Itisopenfrom9a.m.to3p.m.fromMondaytoFriday.ButonWednesdayit'sshutallday. There'salsoalargeareaforvisitorstoenjoyapicniclunch.Butpleasedon'tthrowrubbish. Bicyclesareforhire租用.Foranhouritcosts﹩3.5andforhalfadayit's﹩9.79. Specialeventsareheldattheparkduringthesummer.There'sgoingtobeanoutdoorplayaconcertandahorse﹣ridingracethissummer. Moreinformationabouttheparkcanbefoundonourwebsitewww.brandonforestpark.com.
用托盘天平测量钢块质量时应将天平放在水平桌面上游码移到标尺的处若天平的指针静止在如图甲所示位置此时应将右端的平衡螺母向调选填“左”或“右”使天平平衡测铜块的质量时天平右盘内砝码的质量和游码在标尺上的位置如图乙所示则铜块的质量是g．
IfyouaretiredofmakinghumanconnectionsLovetcanbeagreatchoiceforyou.AJapanesecompany1发明itinDecember2018.Itisafriendlyrobotwhichcanmake2孤独的peoplefeelthelove. The3名字Lovetcomesfromthetwowords﹣loveandrobot.Withtwobrighteyesanda4柔软的bodyLovetmovesaroundyourhouseandasksyouforhugs.Itdoesn'ttalkbutchirps作唧唧声. Lovetfollowsyouwiththehelpofa5照相机onitshead.Italsohasabilitiestotellwhoyouarebyreadingyourface.Itcan6甚至rememberupto1000faces. Therobotcannothelpyouwithhouseworkbutitwill7发展yourabilitytolove.Itmovesaroundonthreewheelsandwavesitstwolittle8手臂toshowsurpriseandloveortoaskforahug.Itsleepswhenit'shuggedanditfollowsyouwhenitiscalled.Itis9害羞的aroundstrangers.Whenyouopenthedooritwillhide10在…后面you.Ifyouwanttomakeitlaughjusttouchit. Lovetwilldoallitcantofillyouwithjoy.
AfterschoolonFridayIwaitedattheschoolgatetowalkhomewithJemmaasusual.ThenIsaw1talkingandlaughinghappilywithsomeothergirls.Sheglanced瞥了一眼atmeandleftmealonethere.IknewrightthenthatIhad2mybestfriend. AtdinnerMomaskedIsJemmacomingbytomorrow? Ishrugged耸肩andsaidnothing. ThenextmorningMomaskedTodayis3.WhatareyouandJemmagoingtodo?Ishruggedagain.4isJemma? Momtookalookatme.ThenshesaidWillyoutakethesemagazinestoGrandmaplease? 5Iwalkeddownthestreetanewgirlintheneighborhoodcametowardsmesmiling.ButIjustwent6her. Grandmawelcomedmeatthedoorwithawarmhug. SittingonthesofaInoticedaan7ofkidsinold﹣fashionedclothesonthetable.Grandmapointedatagirlwithshortfairhair. That'sBethLambertshesaidMybestfriend.Untilaweekbeforewetookthisphoto.Iwas8atthat. BethandIwerebestfriendsinschool.Wedideverything9.Thenonedayshemadenewfriendsandsaidshedidn'twanttohangoutwithmeanymore.Nothinghurt10that. Ididn'tsayanything.Icouldn't.IknewI'dstart11ifIopenedmymouth. Grandmahuggedmeagain.Simonesometimesfriendsgrow12.Itmighthappentoanyoneshecontinued.Thenseehim?Grandma'sfinger13toaboywithglassesinthephoto.Helivednearme.WhenIwaswalkinghomebymyself14thisboywastooIsaid'hello'.Andwebecamefriends. Soifwewanttostartanewfriendshipshesmiled.One15isallittook. AsIwasheadinghomethatnewgirlappearedagain.IwenttowardsherandspokeHello. 1A.it B.them C.her D.him 2A.lost B.hurt C.forgotten D.beaten 3A.Monday B.Friday C.Saturday D.Sunday 4A.How B.Where C.Which D.Who 5A.As B.Before C.After D.Until 6A.to B.past C.with D.against 7A.card B.photo C.poster D.advertisement 8A.glad B.angry C.satisfied D.surprised 9A.together B.outside C.differently D.quickly 10A.lessthan B.becauseof C.morethan D.insteadof 11A.singing B.laughing C.shouting D.crying 12A.old B.separate C.strong D.close 13A.moved B.connected C.returned D.waved 14A.so B.but C.for D.and 15A.hug B.smile C.word D.question
ItwasDay1ofourvacationonCortesabeautifulquietisland.iPhoneiPhoneiPhonemysonkeptmoaning呻吟.Infrontofhimwasabigwindowfacingtheblueocean.Andacoolgentlewindwascominginfromthedoor.Clearlyhesawandfeltnoneofit. BackathomeI'dsoongiveupandhandthephoneovertohimafterfiveminutesoflisteningtothiskindofmoaning. ButnothereBeforeweleftIhadtoldmy10﹣year﹣oldsontherule一noemailsnoFacebooknovideogamesandnoiPhone.Wecameheretogetawayfromthemall.Herewewereonourfirstdayandalreadyhecouldn'tstandit. ▲Iwalkeddownthegrassroadtothebeachandlookedouttothesea.My6﹣year﹣olddaughterandmyhusbandweredrawingonpiecesofwood.Theyweredoingjustfine. OnDay2wespentthewholemorningdiggingforshells贝壳.Thistimemysonjoinedus.Hecollectedshellfishandotherseatreasures.WhenwegotbacktoourlittlewoodhouseIgavemysonabookandputhimonthelovelygardenchair.Itwasalmostdinnerwhenhelookedup. Thenextfewdayspassedinpeace. OnDay6mysonwaslyingbesidemeonthebeachwatchingthesungoingdown.Hewasplayingwiththesand.Andtherewassomethingshininginhiseyes.Irealizedhowtimesloweddownforbothofus.ItwasexactlywhatIwanted.Finallywewereabletositquietlywithoutthinkingaboutscreensphonecallsande﹣mail. Aweekawayfromalltheelectronicsandlifeisgood. 1Whatisthespecialruleforthewriter'svacation? A.Theycouldn'tusetheirelectronics. B.Theymustkeepquietandstayinthehouse. C.Theyhadtospendtheirvacationonanisland. D.Theyshouldcollectasmanyshellsaspossible. 2Whichofthefollowingcanbeputin▲''inParagraph4? A.Ifeltreallytiredandwenttobed. B.Iclosedthedoorandstayedwithhim. C.Ijustwalkedoutsidetoleavehimalone. D.IgavehimhisiPhoneandlethimstayinside. 3Thechangeoftheson'sfeelingscanbedescribedas. A.angry→surprised→proud B.excited→peaceful→bored C.worried→angry→hopeful D.bored→peaceful→pleased 4Thebesttitleforthepassagecanbe. A.ATerribleLifeontheIsland B.ASpecialiPhoneforMySon C.AFightbetweenMotherandSon D.AVacationAwayfromElectronics
IfyouaretiredofmakinghumanconnectionsLovetcanbeagreatchoiceforyou.AJapanesecompany1发明itinDecember2018.Itisafriendlyrobotwhichcanmake2孤独的peoplefeelthelove. The3名字Lovetcomesfromthetwowords﹣loveandrobot.Withtwobrighteyesanda4柔软的bodyLovetmovesaroundyourhouseandasksyouforhugs.Itdoesn'ttalkbutchirps作唧唧声. Lovetfollowsyouwiththehelpofa5照相机onitshead.Italsohasabilitiestotellwhoyouarebyreadingyourface.Itcan6甚至rememberupto1000faces. Therobotcannothelpyouwithhouseworkbutitwill7发展yourabilitytolove.Itmovesaroundonthreewheelsandwavesitstwolittle8手臂toshowsurpriseandloveortoaskforahug.Itsleepswhenit'shuggedanditfollowsyouwhenitiscalled.Itis9害羞的aroundstrangers.Whenyouopenthedooritwillhide10在…后面you.Ifyouwanttomakeitlaughjusttouchit. Lovetwilldoallitcantofillyouwithjoy.
PetEmergency?Callusrightawayat403342﹣5200! IfyouliveinRedDeerorthesurroundingareaandneedatrustedveterinarian兽医tocareforyourpets﹣looknofurther.Dr.PatHigginsisalicensedAlbertaveterinariantreatingalltypesofpets.Yourpets'healthandhappinessareveryimportanttousandwetakeeverypossiblemeasuretogiveyouranimalsthecaretheydeserve. DeerParkPetHospitalisafullserviceanimalhospitalandwelcomesbothemergencytreatmentcasesaswellaspetpatientsinneedofroutinemedicalsurgicalanddental牙科care.Dr.PatHigginshasyearsofexperiencetreatingseriousconditionsandofferingregularpethealthcare.Beyondfirstratepetcarewemakeourcliniccomfortablekid﹣friendlyandcalmsoyourpetcanrelaxinthewaitingroomandlookforwardtomeetingourRedDeerveterinarian. Wearehappytoofferanumberofresourcesthatenableyoutolearnabouthowtotakebettercareofyourpets.Pleasefeelfreetobrowseoursiteparticularlytheinformationalarticles.Thebestveterinarycareforanimalsisongoingnutritionandproblemprevention80becomingknowledgeableaboutpreventativepetcareisvitaltotheongoingsuccessofyouranimal'shealth.Ifyouhaveanyquestionscall403342﹣5200oremailusandwe'llimmediatelygetbacktoyou.OurRedDeerveterinarianofficeisveryeasytogetto﹣andyoucanfinddirectionsonourContactUspage!WealsowelcomeyoutosubscribetoournewsletterwhichiscreatedespeciallyforRedDeerpetowners. AtDeerParkPetHospitalwetreatyourpetslikethevaluedfamilymemberstheyare. Dr.PatHiggins RedDeerVeterinarian|DeerParkPetHospital|403342﹣5200 420AllanStreet#4 RedDeerAlbertaT4R2K7 1Whatdoesthehospitalspeciallyoffertopets? A.Petlicensesandtimelycare. B.Clinicroomsandpetplaymates. C.Goodpetdoctorsandfullservices. D.Thebestmedicineandtreatment. 2Whatisthemostimportantforpethealth? A.Foodandexercise. B.Nutritionandprevention. C.Technologyandequipment. D.Experienceandpatience. 3Whatistheauthor'spurposeinwritingthepassage? A.Tomakeanadvertisementforapethospital. B.Toinformpetownershowtotreattheirpets. C.Tointroduceatrustedveterinariantopetowners. D.Totellpeopletotreattheirpetsbetter.
小芳到实验室做测量小灯泡额定功率的实验时老师只给她提供了如下器材标有2.5V的小灯泡电源滑动变阻器开关两个电压表没有电流表阻值为10Ω的定值电阻R0导线若干．她根据所给定的器材经过认真思考后设计了正确的实验电路如图甲是该电路的不完整电路图．1请你将图甲中电路图补充完整．2闭合开关前应将滑动变阻器调至阻值的位置．3闭合开关后为了测量小灯泡的额定功率应调节滑动变阻器使电压表V1的示数为V此时电压表V2的示数如图乙所示是V．4小灯泡的额定功率为W．5她还进一步设计出了只有电流表没有电压表解决这个问题的方法其电路如图丙所示R0＝10Ω并认为关键的一步是必须调节滑动变阻器使电流表A2的示数为A时再读出电流表A1的示数才能计算小灯泡的额定功率．
和大多数物质一样汽油也有热胀冷缩的性质随着气温上升汽油的密度会选填“变大”或“变小”受此因素影响在每吨汽油价格不变的情况下夏季每升每立方分米汽油的价格应比冬季的价格选填“上调”或“下调”．气温升高时汽油的内能是通过方式改变的．
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