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下列物质中，属于盐的是（ ）
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下列选项中属于非生物因子中物质代谢原料的是
温度
降水
无机盐
绿色植物
下列物质中不属于新陈代谢的产物的是
水
无机盐
尿素
粪便
下列物质中属于混合物的是
咖啡
水
盐
铁
下列物质中属于食物为人体提供的营养物质有①蛋白质②脂肪③糖类④水⑤无机盐⑥维生素
①②③⑤⑥
①③④⑤⑥
①②③④⑤⑥
②③④⑤⑥
下表是部分酸碱和盐的溶解性表室温中的一部分下列与★处有关的说法中正确的是
★处对应物质的化学式是CuNO
3
★处对应物质属于盐
★处应填“不”
★处对应物质的名称是氯化铜
下表是部分酸碱和盐的溶解性表室温中的一部分下列与★处有关的说法中正确的是
★处对应物质的化学式是CuNO
3
★处对应物质属于盐
★处应填“不”
★处对应物质的名称是氯化铜
.下列营养物质中均属于无机物的是
水和糖类
脂肪和无机盐
水和无机盐
糖类和脂肪
下列物质中不属于新陈代谢产物的是
水
无机盐
尿素
粪便
下列物质中属于碳酸盐硬度暂时硬度的是属于非碳酸盐硬度的是属于负硬度的是属于中性盐的是
下列物质中属于盐的是
氯化钠
盐酸
氧化镁
氢氧化铝
下列物质中属于单质的是
水
氢气
盐
糖
下列物质中属于纯净物化合物盐钙盐的是
石灰水
Ca(OH)
2
CaCO
3
NH
3
下列物质中属于盐的是
H
2
SO
4
CaCO
3
NaOH
NaCl
下列物质中属于盐的是
NaCl
CO
2
NaOH
H
2
SO
4
下表是部分酸碱和盐的溶解性表室温中的一部分下列与★处有关的说法正确的是
★处对应物质的化学式是CuNO
3
★处对应物质属于盐
★处应填“不”
★处对应物质的名称是氯化铜
下列物质中属于化合物的是
氮气
牛奶
盐
铜
下列物质中属于盐的是
MgO
H
2
SO
4
NaOH
KNO
3
下列物质中属于两性表面活性剂的是
聚氧乙烯
硫酸酯盐
季胺盐
烷基甜菜碱
掌握物质的分类是学习化学的基础下列物质中属于盐的是
NaCl
KOH
MgO
Cu
下列物质中属于盐的是
氯化钠
盐酸
氧化镁
氢氧化铝
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要完成下列两项调查①从某社区125户高收入家庭280户中等收入家庭95户低收入家庭中选出100户调查社会购买力的某项指标②从某中学的15名艺术特长生中选出3人调查学习负担情况宜采用的抽样方法依次为
6分WhychooseCambridgeEnglish? Giveyourstudentsthebestsupport AspartoftheUniversityofCambridgewearecommittedtoexcellenceineverythingwedo.Weareknownallovertheworldforqualitymaterialsthatreallywork﹣fromtheever﹣popularEnglishGrammarinUsetobest﹣sellingcourseslikeTouchstoneandEnglishinMind. It'snowonderthattensofmillionsofteachersandlearnersaroundtheworldhavechosenCambridgetohelpthemachievetheirgoals. Focusonthelanguagetheyreallyneed WithCambridgeEnglishyoucanbesurethatthelanguageyou'reteachingisnaturaluptodateandusefulforyourstudents.WeusethelatestresearchtounderstandhowEnglishworksandtohelpstudentslearnmoreeffectively. Prepareforexamsuccess WearetheonlypublisherofofficialpreparationmaterialsforCambridgeEnglishexams.OurwideselectionofcoursespracticetestsandmaterialsaredevelopedinclosecooperationwithCambridgeEnglishLanguageAssessmentthepeoplewhosettheexams.Soyoucanfullyprepareyourstudentsforexamsuccess. Developasateacher Yourprofessionaldevelopmentisimportanttoustoo.WeprovideoutstandingteachersupportincludingteachertrainingseminarsandtheuniqueonlineprofessionaldevelopmentsiteCambridgeEnglishTeacher. WearealsoincreasinglyworkingwithtopschoolsaroundtheworldofferingourexperienceexpertknowledgeandskilltohelpdevelopCambridgeEnglishschools. 21.WhatisoneadvantageofCambridgeEnglish? A.Usefulmaterials. B.Experiencedteachers. C.Anauthenticlearningenvironment. D.Detailedresearchonlanguage. 22.WhycanCambridgeEnglishhelpstudentsbecomeconfidentaboutCambridgeEnglishexams? A.Becausetheexamsarewrittenbyitsteachers. B.Becauseitworkstogetherwiththeexamauthority. C.Becauseitisguidedbylanguageassessmentexperts. D.Becauseitsmaterialsareprovidedbyofficialexaminers. 23.Whattypeofwritingisthistext? A.Aguide. B.Areport. C.Anannouncement. D.Anadvertisement.
30分If1ranmybusinessthewayyoupeopleoperateyourschoolsIwouldn'tbeinbusinessverylong!Isaidbeforeagroupofangry41Irepresentedagroupofbusinesspeoplewhowantedto42publicschools.Iwasamanageratanicecreamcompanythatbecame43whenPeoplemagazinechoseourblueberry蓝莓astheBestIceCreaminAmerica. AssoonasI44awomanraisedherhand.Tomysurprisesheappeared45andpleasant.Wearetoldsirthatyou46acompanythatmakesgoodicecream. Ireplied47BesticecreaminAmericaMa'amSirshesaid48youarestandingonyourreceivingdock码头andyouseeaninferior质量差的shipmentofblueberries49whatdoyoudo? ImmediatelyIknewthequestionwasatrapbutIwasn'tgoingto50. Isendthemback. That'sright!sheraisedhervoiceandwecan51sendbackourblueberries.Wetakethembigsmallrichpoorgiftedconfidenthomelessrudeandbrilliant.Wetakethemall!Andthatsiriswhyit'snotan52.It'sschool! Inanexplosionall290teachersjumpedtotheirfeetand53Yeah!Blueberries!Blueberries! Andsobeganmylong54. SincethenIhavevisitedhundredsof55Ihavelearnedthataschoolisnotabusiness.Foronethingareunableto56thequalityoftheirrawmaterial. Yetitdoesn'tdenythe57forchange.Wemustchangehowweteachtogiveallchildrentheopportunitytobecome58.Buteducatorscannotdothis59thesechangescanoccuronlywiththeunderstandingtrustpermissionandactivesupportofthewholesociety.60toimprovepubliceducationmeansmorethanchangingourschoolsitmeanschangingthewholecountry. 41.A.workers B.teachers C.parents D.leaders 42.A.replace B.challenge C.influence D.improve 43.A.rich B.Special C.famous D.busy 44.A.continued B.asked C.finished D.criticized 45.A.polite B.shy C.confident D.honest 46.A.manage B.establish C.buy D.help 47.A.happily B.carefully C.eagerly D.proudly 48.A.when B.because C.although D.until 49.A.leave B.arrive C.disappear D.move 50.A.lie B.stop C.admit D.follow 51.A.ever B.never C.also D.just 52.A.blueberry B.icecream C.business D.receivingdock 53.A.reported B.warned C.doubted D.yelled 54.A.transformation B.research C.explanation D.study 55.A.schools B.companies C.countries D.groups 56.A.change B.notice C.examine D.control 57.A.method B.need C.possibility D.reason 58.A.peaceful B.successful C.thankful D.powerful 59.A﹣silently B.secretly C.alone D.again 60.A.Moreover B.Besides C.However D.Therefore
如图所示样本A和B分别取自两个不同的总体它们的样本平均数分别为样本标准差分别为SASB则
如图所示函数y＝2cosωx+θx∈Rω＞00≤θ≤的图象与y轴交于点0且该函数的最小正周期是π． 1求θ和ω的值． 2已知点A0点P是该函数图象上一点点Qx0y0是PA的中点当y0＝x0∈[π]时求x0的值．
下列函数中最小正周期为π的是
8分Therehasbeenatechnologicalrevolutionwherekindlese﹣booksandvariousonlinereadingappshavetakenovertheworld.Isreadingaprinthookoutofdate?Wellnotexactly. Therearesomanywonderfulfactorsinvolvedwithreadingaprintcopyofthebook.IremembertheexcitementofgoingtothebookstorewithmymomwhenIwasinelementaryschool.ThefeelofsittingdowninthehookstoreandselectingthebooksIwantedtoreadwasjustsomuchfun!Ithinkthatreadingpaperbackbookshasitsowncharmandexcitementthatcannotbereplacedbyanelectronicbook.Holdingthephysicalcopyofthebookinmyhandsandturningovereachpagemakesthereadingexperiencesomuchmorerealandmemorable. Admittedlye﹣booksseemtobemoreconvenientthanprintbooks.Purchasingane﹣bookcantakeplaceinsecondsandthesebooksareoftenpricedlessexpensivelythanprintcopybooks.Withe﹣bookstheremostlikelyisn'tgoingtobeastorageproblemunlessthedevicehasalimitonhowmanybookscanbepurchased.Thenagaininordertoreade﹣booksonemusthaveaparticulardevice﹣tabletiPadKindleorlaptoptoreaditon.Thusanadditionalpaymenthastohemadeinordertoreade﹣bookswhereasreadingprintcopiesdoesnotinvolveanyextradevice. Printbooksneveractuallystoppedleadingthechargeconsideringthate﹣booksaleshavenevermadeupmorethanathirdofallbooksales.Andalthoughtheyrosetothatnumberextremelyquickly﹣AmazononlyintroducedtheKindlein2007﹣themajorityofallhookssoldhasalwaysbeenprint.Therealityisthatthereisabsolutelynoreasonprintande﹣bookscan'tcoexistinthebookmarketbutprinthooksmaycarrytheday. 12.Whatpleasuredoestheauthorhavewhenhereadsprintcopybooks? A.Hedoesn'thavetobuyatabletoriPad. B.Hecangethomeandstayonthecouchtoenjoyreading. C.Hecanenjoyfillinghisshelfwithbooks. D.Hecansitdowninthebookshopandreadwhathelikes. 13.Whatadvantagedoe﹣bookshaveaccordingtothepassage? A.Thereadingexperienceismorereal. B.Thereisnostorageproblematall. C.Purchasingthemtakeslesstime. D.Theyareverypriceless. 14.Whatcanweinferaboutthebookmarket? A.E﹣booksalesmakeupmorethan1/3ofit. B.E﹣booksaleshaveneversurpassedprintbooksales. C.Amazonoccupiesmostofthemarket. D.Printbooksande﹣bookscan'tcoexist. 15.Whatcanbeasuitabletitleforthetext? A.PrintBooksMayOutlastE﹣Books B.BooksChangewiththeTechnology C.E﹣booksAreMoreConvenientthanPrintBooks D.TechnologicalRevolutionisCreatingaReadingRevolution.
10分假定英语课上老师要求同桌之间交换修改短文请你修改你同桌写的以下作文文中共存10处语言错误每句中最多有两处每处错误仅涉及一个单词的增加删除或修改. 增加在缺词处加一个漏字符号^并在其下而写出该加的词. 删除把多余的词用斜线\划掉. 修改在错的词下面画一横线并在其下面写出修改后的词. 注意1.每处错误及其修改均仅限一词 2.只允许修改10处多者从第11处起不计分. Mymathteacherisusedtotakeoffhisovercoatassoonashecomesintotheclassroom.Afterthathewillasksomeoneansweraquestion.Insteadofgivingtheanswerheletussolvetheproblemonhisown.Healwaysexplainsthemethodclearandintroducesmanyapproachtoworkingouttheproblem.Atfirstourclassmathperformancewasbadthanthatoftheotherclass. Howeverwithhishelpwehadovertakenthem.Inadditionhealwayskeepshisword.Heusedtopromiseusasifwecouldperformwellhewouldbuyusadrink.Asaresultweachievedourgoalsandhedidwhichhesaid.
甲乙丙三人随机排成一排乙站在中间的概率是
10分假定英语课上老师要求同桌之间交换修改作文请你修改你同桌写的以下短文.短文中共有10处错误每句中最多有两处.错误涉及一个单词的增加删除或修改. 增加在缺词处加一个漏字符号∧并在此符号下面写出该加的词. 删除把多余的词用斜线\划掉. 修改在错的词下划一横线并在该词下面写出修改后的词. 注意1.每处错误及其修改均仅限一词 2.只允许修改10处多者从第11处起不计分. Everyyearmyschoolholdsthesummercamp.I'dlovetakepartinthisactivitysomuchbecauseIcanhavealotoffunswithmyfriends.Lastyearwegotocountryfarmthatweexperiencedadifferentlife.IwassoimpressedbytheclearriveandHueskythere.Theywokeupearlyinthemorningandthenwalkedinthecountryroadtogether.Thecountrysideweresoquietandtheairwassofresh.Ifeltrealpeacefulinmymind.BecauselifetherewassimplesoIlikeditverymuch.Iwassoclosetothenatureandcouldappreciateitsbeauty.
10分ThereisanoldSpanishProverbwhichstatesTomorrowisoftenthebusiestdayoftheweek.1I'dsaytoomany.Ourdreamsshouldnotandcannotwait.Wehavetogoforthemnow!Here'swhy. 1.2 Nobodylikestotalkaboutdeathbuttherealityis﹣everybodyisgoingtodieatonepoint.Noneofusknowthedayorthehour.Thereforetodayisallwehave.Don'tgotoyourgravewithunfulfilleddreams.Makethedecisiontogoaftereverydreambigorsmallrightnow. 2.Theworldiswaitingonyourgift IknowthismaybehardtobelievebuttheworldiswaitingonYOU!YesYOU!3Sureotherpeoplemaybeabletosing.Butthey'llneverbeabletosingexactlylikeyou.Sureotherpeoplecanwritebutthey'llneverbeabletowritefromthesameperspectiveinwhichyouwrite.Don'tdeprivetheworldofyourgift. It'stheoxygenthatweneedtosurvive.Thusitisyourresponsibilitytofigureoutexactlywhatyourgiftisandusetobetteryourlifeandthelivesofthosearoundyou. 3.4 YoucandreamaboutwritingthegreatAmericanplaythatyouwantbutit'snevergoingtohappenunlessyouactuallyputpentopaper.Youcandreamaboutfindingacureforcancerbutitwillneverhappenunlessyouactuallygotoschooltobecomeequippedwiththenecessarytoolstofindthatcure.5Theyrequireyoutogetyourheadoutofthecloudsandactuallydotheworktomakethemhappen.Gettoit! A.Youcan'tletfearwin. B.Tomorrowisnotpromised. C.Inotherwordsdreamsdon'tworkunlessyoudo. D.Possibilitiesyouneverknewexistedarewaitingonyou E.Howmanytimeshaveweputoffourdreamsuntiltomorrow? F.Unlessyoutakethefirststepyourdreamswillnevercometrue. G.Youwerebornintotheworldwithauniquegiftwhichnobodyonthisearthcancopy.
8分TheCardboardBoxOfficeisaprojectcreatedbyLillyandLeonMackiewhorecentlymovedfromNewZealandtoSydneyAustralia.ThetransferleftthemwithamountainofcardboardboxesandthearrivaloftheirbabysonOrson10monthsagomeanttheirsocialliveswerecompletelyaltered改变.Sothecoupledecidedtotrytomakesomefunofthesituation. Westartedaftercreatingaone﹣offphotowherewewantedtoportraythegeneralmessandsleep﹣deprivation睡眠thatcomeswithbeingnewparentsLillyMackiesaidinanemail.Peopleseemedtoreallyloveitandaskedformore.Wehadalotofweekendsathomeandastockpileofcardboardsowethought‘Whynot?'Itwentfromthere. TheMackiestookthefirstphotosinSeptemberandhaveportrayed14moviessofarincludingtheirversionsofCastAwayorCastababyandJurassicParkorGoo﹣gooGaa﹣gaa﹣rassicPark.EvenStarWarsgetstheMackietreatmentwithOrsonholdingacardboardtubeinplaceofasaber军刀andmomsportingimpressivePrincessLeia﹣likehairbunsHImadeoutofbrownpaperinthephototitledWahWars. Thefamilyusuallycreatesthesetson'SaturdaysandpoststhewhimsicalpicturesontheirblogandFacebookpagewhichhavealmost3000fans.Besidescardboardboxesthephotosfeaturecostumesprops道具andsetscreatedoutofeverydayhouseholditemstoysandthreeindividualsslowlylosingtheirsensetheyjokedontheirblog. Leonachildren'sbookdesigneratalargepublishingcompanyandLillyastay﹣at﹣homemomarebothfilmbuffsandphotographyfans.Thebabyisalsobecomingaconnoisseur鉴赏家ofmoviesandcardboardboxes. Orsonseemstofindthephotoshootsquitefascinatingandenjoysexploringthesets﹣andtearingthingsapart.There'sneveradullmomentforhimonSaturdaynightsLillysaid.Whenhegetsalittleolderwe'11bringinalotmoreofhisinputaskingforhisideasonfilmsandsets.Makeitarealfamilything.Ithinkhemaycomeupwithsomequitefunnythings. 28.TheoriginalreasonwhytheMackiescreatefamilymoviesisthat. A.theywanttoearnagreatdealofmoney B.bothofthemarechildren'sbookdesigners C.theyhavenofriendsintheirnewcommunity D.theywanttomaketheirfamilylifeinteresting 29.WhatdoweknowabouttheMackies'familymovies? A.TheyareusuallymadeonSundays. B.TheyarenotpopularontheInternet. C.Someofthemaremadebasedonfamousfilms. D.Theyaremainlyaboutearlychildhoodeducation. 30.WhichwordisclosestinmeaningtotheunderlinedwordwhimsicalinParagraph4? A.Unusual. B.Valuable. C.Famous. D.Disgusting. 31.What'sthefinalpurposeoftheMackies'makingfamilymovies? A.Toteachaudienceshowtomakefilms. B.Toprovetheirbabyisverybright. C.TodevelopOrson'sskillsinart. D.Tomakethemselves.famous.
已知扇形的圆心角为rad半径为6cm则扇形的弧长为cm．
设D为△ABC所在平面内一点则
8分WhenviewedfromtheSchuylkillExpresswayinPhiladelphiaSt.John'sChurchpresentsapictureofdignityandgrace.Thisgray﹣stonedbeautysurroundedbyaparkmadeawonderfulsettingfortheweddingmywifeandIattendedinManayunk. AtthechurchIranintoanoldfriend?CasperBarratawhohappenedtobeassignedtotheMass弥撒.Now73Casperwasabrilliantandtalentedsoftballpitcher投手backintheMen'sLeaguesofPhiladelphiainthemid﹣60s.Ididn'trecognizethenowsilver﹣hairedfellowuntilmybrother﹣in﹣lawJohnKaymentionedhisnametome!AfteraverypleasantgreetingandpraisingeachotheronhowgoodtheotherwasatplayingthegamebackthenCasperaskedifIrememberedaletterofencouragementIhadwrittentohimbackin1964.ItappearedthatCasperfellonhardtimespitchingaspitcherssometimesdoandhewasn'1pitchingtoowellforaperiodoftime.Ididn'trecalltheletterbuthesaidYesIstillhaveitandIcontinuetoreaditanytimethingsaren'tgoingtoowell.Hewentontosaythathehadreadthelettermanytimesoverthepast40yearsandthesituationalwaysseemedtoimprove.Iwasspeechless! HecontinuedYoudon'tremember?IsaidSadlynoIdon't.ButIdidaskifIcouldhaveacopyoftheletter.Hesaidhewouldemailittome.AfterCasperfinishedworkatMurphy'sweddingwemetonthestepsofthechurch.Caspercameuptomeandpresentedtheletter.HelivedablockawayfromthechurchandranhometogetitaftertheMass.Theenvelopehadfadedandturnedyellowandsowastheletterinside.Thatletterhadtobenearly50yearsold.Insimpletermstheletterread ThesehardtimesaretemporaryMaintainyourpassionforthegame.Neverquitandyou911bebackontopagainshortly.Hanginthere! CasperBarrataonceagainbecamethebestpitcherintheLeagueandremainedtobeathorninourteam'ssideeverytimehepitchedagainstus. 25.Whydidtheauthorgotothechurch? A.Togetmarried. B.Toholdawedding. C.Toattendawedding. D.TomeethisfriendCasperBarrata. 26.Whatcanbeinferredfromthetext? A.Theauthoroncefellonhardtimespitching. B.TheauthoronceoftenworkedfortheMass. C.Theauthoroncewasgoodatplayingsoftball. D.TheauthoroncetaughtCaspertoplaysoftball. 27.WhatdoestheunderlinedsentenceshowinParagraph2? A.TheauthorwasmovedbyCasper. B.Theauthorwasn'tgoodatspeaking. C.TheauthoradmiredCaspertoomuch. D.Theauthordidn'trecalltheletteratall. 28.WhydidCasperkeeptheletterfordecades? A.Theletterwassentbyhisbestfriend. B.Theletterinspiredhiminhissportcareer. C.Theletterwaswrittenbyasoftballpitcher. D.Theletterhelpedhimrecallsomethinginthepast.
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