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小鹏同学第一次数学月考成绩为a分，经过努力，第二次月考成绩提高到6分，则用代数式表示小鹏数学月考成绩的提高率为（）。
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中小学校长招聘考试《单项选择》真题及答案
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小明近期几次数学测试成绩如下第一次分第二次比第一次高分第三次比第二次低分第四次又比第三次高分.那么小
90分
75分
91分
81分
计算delta值Δ%公式为
Δ（%）=第二次结果－第一次结果
Δ（%）=第一次结果－第二次结果
Δ（%）=［（第二次结果－第一次结果）/第一次结果］×100
Δ（%）=［（第二次结果－第一次结果）/第二次结果］×100结果
Δ（%）=［（第二次结果－第一次结果）/（第一次结果－第二次结果）］×100
某中学是走读中学为了让学生更有效率利用下午放学后的时间学校在本学期第一次月考后设立了多间自习室以便让
小明近几次数学测试成绩如下第一次85分第二次比第一次高8分第三次比第二次低12分第四次又比第三次高1
90分
75分
91分
81分
张红是某大学一年级的学生她参加了微积分的两次考试第一次考试中全班的平均成绩是75分标准差是10分第二
不相同，第一次比第二次好
不相同，第二次比第一次好
相同
因为不知道班里人数而无法判断
如图为某班50人在第一次月考与第二次月考中的体育成绩折线统计图根据上图中的信息该班学生第二次月考体
某学生第一次数学检测得80分第二次得86分那么他第三次检测得分的情况为时才能使平均成绩不低于85分
小鹏同学第一次数学月考成绩为a分经过努力第二次月考成绩提高到b分则用代数式表示小鹏数学月考成绩的提
(b-a)×100%
(a-b)×100%
C.选项C
D.选项D
小明近期几次数学测试成绩如下第一次85分第二次比第一次高8分第三次比第二次低12分第四次又比第三次高
90分
75分
91分
81分
计算delta值Δ%公式为
δ（%）=第二次结果－第一次结果
δ（%）=第一次结果－第二次结果
δ（%）=［（第二次结果－第一次结果）/第一次结果］×100
δ（%）=［（第二次结果－第一次结果）/第二次结果］×100结果
δ（%）=［（第二次结果－第一次结果）/（第一次结果－第二次结果）］×100
小明近期几次数学测验成绩如下第一次85分第二次比第一次高8分第三次比第二次低12分第四次又比第三次高
90分
75分
91分
81分
08汉沽一中第三次月考图示某雄性二倍体运动体内一个正在分裂的精原细胞这个细胞所处的时期为
有丝分裂中期
减数第一次分裂中期
减数第二次分裂中期
减数第一次分裂间期
杰伦最近几次英语测验的成绩如下第一次考了85分第二次比第一次高8分第三次比第二次高﹣5分那么杰伦第三
86分
87分
88分
89分
小明近期几次数学测试成绩如下第一次85分第二次比第一次高8分第三次比第二次低12分第四次又比第三次
小明近期几次数学测试成绩如下第一次85分第二次比第一次高9分第三次比第二次低12分第四次又比第三次
72分
82分
92分
94分
2015年·宁德二模已知某市两次数学测试的成绩ξ1和ξ2分别服从正态分布ξ1N19086和ξ2N29
第一次测试的平均分比第二次测试的平均分要高，也比第二次成绩稳定
第一次测试的平均分比第二次测试的平均分要高，但不如第二次成绩稳定
第二次测试的平均分比第一次测试的平均分要高，也比第一次成绩稳定
第二次测试的平均分比第一次测试的平均分要高，但不如第一次成绩稳定
小鹏同学第一次数学月考成绩为a分经过努力第二次月考成绩提高到b分则用代数式表示小鹏数学月考成绩的提高
A
B
C
D
小明近期几次数学测试成绩如下第一次85分第二次比第一次高8分第三次比第二次低12分第四次又比第三次高
90分
75分
91分
81分
小明近期几次数学测试成绩如下第一次85分第二次比第一次高8分第三次比第二次低12分第四次又比第三次
90分
75分
91分
81分
小明近期几次数学测试成绩如下第一次85分第二次比第一次高8分第三次比第二次低12分第四次又比第三次高
90分
75分
91分
81分
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DearAmy IhaveaproblemandI’mwritingaskyou1. foranadvice.Thisisasecretsoldon’ttellanybodyelse.2. MycousinandIusedtogettingalongverywelland3. weweregoodfriend.Wewereplanningtospend4. partofthewinterholidaytogetherbutnow5. Idon’tthinkIwanttoinviteherhome.6. RecentlyIhasdiscoveredthathe’sstartedtotell7. lies.WhenItoldhimthiswaswrongtotelllies8. buthejustlaughedatme.TheproblemisshouldI9. tellhisparentsorhisteacherorshouldIkeepquietly.10. 第6空应
C OnChristmasEve—thenightbeforeChristmasDay—childrenalloverBritainputastockingattheendoftheirbedsbeforetheygotosleep.TheirparentsusuallytellthemthatFatherChristmaswillcomeduringthenight. FatherChristmasisverykind-hearted.Hegetstothetopofeachhouseandclimbsdownthechimneyintothefireplace.HefillseachofthestockingswithChristmaspresents. OfcourseFatherChristmasisn’treal.InJimandKate’shouse"FatherChristmas"isreallyMr.Green.Mr.Greendoesn’tclimbdownthechimney.Hewaitsuntilthechildrenareasleep.Thenhequietlygoesintotheirbedroomsandfillstheirstockingswithsmallpresents.WhentheywereveryyoungMr.Greensometimesworearedcoat.Buthedoesn’tdothatnow.Thechildrenarenolongeryoungandtheyknowwho"FatherChristmas"reallyis.Buttheystillputtheirstockingsattheendoftheirbeds. Whenthechildrenareolderthey.
D PeopleoftensaythattheEnglishman’shomeishiscastle.Theymeanthatthehomeisveryimportantandpersonaltohim.MostpeopleinBritainliveinhousesratherthanflatsandmanypeopleowntheirhomes.Thismeansthattheycanmakethemindividual个体的;theycanpaintthemandchangetheminanywaytheylike.Mosthouseshaveagardenevenifitisaverysmalloneandthegardenisusuallyloved.Thehouseandthegardenaretheprivate私人的spaceoftheindividual. Peopleusuallyliketomarktheirspace.AreyousittingnowinyourhomeoronatrainHaveyoumarkedthespacearoundyourselfasyoursIfyouareonthetrainyoumayputyourcoatorsmallbagontheseatbesideyou.Ifyoushareaflatyoumayhaveonecornerorchairwhichisyourown. OnceIwastravellingonatraintoLondon.Iwasinasectionforfourpeopleandtherewasatablebetweenus.Themanontheoppositesidetomehadhisbriefcaseonthetable.Therewasnospaceonmysideofthetableatall.Iwasangry.Maybehethoughtthatheownedthewholetable.IhadreadabookaboutnonverbalcommunicationsoItookvariouspapersoutofmybagandputthemonhisbriefcase!WhenIdidthishestiffenedandhiseyesnearlypopped瞪出outofhishead.Ihadinvaded侵犯hisspace!AfewminuteslaterItookmypapersoffhiscaseinordertoreadthem.Heimmediatelymovedhiscasetohissideofthetable.Ofcourseitispossiblethathejustwantedtobehelpfultome! Ifyouarevisitinganothercountryyoumayfeelthatyoudon’thaveanyprivatespace.Hotelroomslookmuchthesameineverycountryintheworld.Alldaylongyousharepublicspaceswithotherpeople.Youseethelocalpeopleintheirprivatespacesandyoufeellonelyand"outside".Localpeoplecancreatetheirprivatespacesbytalkingaboutthingsyoudon’tknowabout.Andyouevenfeelthattheylikeyoutobeoutsidethemsothattheywillenjoybeinginsideevenmore!Thisisoneofthedifficultiesofbeingatraveller!Butifyouunderstanditthenithelpsyou.Haven’tyouenjoyedbeingpartofagroupand"owning"abitofspace Themainpurposeofthepassageistotellreadersto.
Onceamanandhiswifeworkedforanoldman.Therewasabigboxintheoldman’slivingroom.Theoldmanpointedtotheboxandsaid"There’sonlyonethingyou1do.Don’topenthebox."2sayingthishelefthishome.Thewomansaidtoherhusband"Theremustbe3expensiveinthebox.Let’sopenitshallwe"Herhusbandsaid4toher.Butthewomandidn’tgiveupher5.Onedayshedecidedtofindout6wasinit.Herhusbanddidn’tstopher.Sheopenedtheboxandlookedinside.Tohersurpriseshefoundnothinginthebox.Shetriedhardtocloseitbutshe7Thateveningtheoldmancamehomeandfoundtheboxwas8.Hewasvery9andaskedthewomanandherhusbandtoleavehishome."Buttherewasnothinginthebox"thewomansaid."Wehaven’ttakenanythingatall."Theoldman10them"TheboxisnotimportantbutIcannotbelieveyou.That’simportant! 第4空应选择
—Wouldyoumindcallingmebacktomorrowagain—.
Herteacherthinksofothers.
A Napogaisa12-year-oldgirlinGhana加纳Africa.Itishardforherfamilytogetcleanwater.Everymorningsheleaveshomeathalfpastfivetogetcleanwaterforherfamilyinavillagefaraway.Ittakeshersixhourstogetenoughcleanwaterfordaily日常的cookinganddrinking.Shehasnotimetogotoschoolortoplaywithherfriends.MillionsofpeopleintheworldarelikeNapoga.Theycan’tgetenoughcleanwatertokeephealthy. EarthDayisApril22.Butonallotherdayswemustalsorememberit.Thewaterweuseisthemostimportantnaturalresource自然资源ontheearth. Watercovers70%oftheearth’ssurface表面.Butmostofthatisseawater.Wecan’tuseitforverymanythings.Freshwatercoversonly1%oftheearth’ssurface. Youprobablyfeelluckythatyourlifeisn’tashardasNapoga’s.Butthatdoesn’tmeanyoudon’thavetoworryaboutwater.Weallfaceseriouswaterproblems.Oneofthemiswaterpollution.Allkindsofthingsfromcarsfactoriesfarmsandhomesmakeourriverslakesandoceansdirty.Pollutedwaterisverybadforpeopletodrink.Anddirtywaterisbadforfishtoo.Now34%ofallkindsoffisharedyingout. HowdocarsandfactoriesmakeourwaterdirtyFirsttheypollutetheair.Thenwhenitrainstherainwatercomesdownandmakesourdrinkingwaterdirty.Dirtyraincalledacidrain酸雨isalsobadforplantsanimalsandbuildings. Scientistssaythatin30yearsmorethanhalfofthepeopleintheworldwon’thaveenoughcleanwater.Wehavetolearnhowtosavemorewaterforourselvesandourchildren.Hereissomeadviceforsavingwater: Turnoffthewaterwhileyoubrushyourteeth.Youcansaveasmuchas450liters升eachmonth. Leakytaps水的龙头wastealotofwater.Fixthemrightaway! Youcaneasilycutyour1O-minuteshowers沐浴inhalf—andyou’llbejustasclean. Whenyouwashdishesdon’tletthewaterrun. Onlywashclotheswhenyouhavealottowash.Ifyourwashingmachineisn’tfullyou’rewastingwater! Ontheearth.
DearAmy IhaveaproblemandI’mwritingaskyou1. foranadvice.Thisisasecretsoldon’ttellanybodyelse.2. MycousinandIusedtogettingalongverywelland3. weweregoodfriend.Wewereplanningtospend4. partofthewinterholidaytogetherbutnow5. Idon’tthinkIwanttoinviteherhome.6. RecentlyIhasdiscoveredthathe’sstartedtotell7. lies.WhenItoldhimthiswaswrongtotelllies8. buthejustlaughedatme.TheproblemisshouldI9. tellhisparentsorhisteacherorshouldIkeepquietly.10. 第8空应选择
Annalivedonthesideofavalley山谷.OnewintertherewasaverybigfloodandalotofhousesdownbelowAnna’shousewerewashedaway.Anna’shousewashighenoughtoescapethefloodsowhenthewaterhaddisappearedandtheotherhouseswerestandingtherewithnoroofsandwallsandallcoveredwithmudherhousewasstillquiteallright.ThatyearAnna’swasverylucky. HerhousewasquitesmallandtherewereonlytwosmallbedroomsherhusbandwasdeadwhenthechildrenwereveryyoungandshehadfourchildrenbutAnnatookinoneofthefamiliesthathadlosteverythinginthefloodandshesharedherhomewiththemuntilitwaspossibleforthemtorebuildtheirhouse. Anna’sfriendswereverypuzzled困惑whentheysawAnnadothis.TheycouldnotunderstandwhyAnnawantedtogiveherselfsomuchmoreworkandtroublewhenshehadalreadyquitealotofchildrentosupport.Lifewouldbeevenharderwhenanotherfamilyjoinedthem. "Well"Annaexplainedtoherfriends"attheendoftheFirstWorldWarawomaninthetownwhereIthenlivedinGermanyfoundherselfverypoorbecauseherhusbandhadbeenkilledinthewarandshehadalotofchildrenasIhavenow." "ThedaybeforeChristmasthiswomansaidtoherchildren’Wewon’thavemuchforChristmasthisyearsoIamgoingtogetonlyonegiftforallofusandIamsurewewillallbegladtohaveit.NowI’llgoandgetit.’Shecamebackwithalittlegirlwhowasevenpoorerthantheyandwhohadnoparents.’Hereisourgift’shesaidtoherchildren." "Thechildrenwereveryexcitedandhappytogetsuchagift.TheywelcomedthelittlegirlandshegrewupastheirsisterIwasjustthatChristmasgift./ WhendidAnnaliveinGermany
Annalivedonthesideofavalley山谷.OnewintertherewasaverybigfloodandalotofhousesdownbelowAnna’shousewerewashedaway.Anna’shousewashighenoughtoescapethefloodsowhenthewaterhaddisappearedandtheotherhouseswerestandingtherewithnoroofsandwallsandallcoveredwithmudherhousewasstillquiteallright.ThatyearAnna’swasverylucky. HerhousewasquitesmallandtherewereonlytwosmallbedroomsherhusbandwasdeadwhenthechildrenwereveryyoungandshehadfourchildrenbutAnnatookinoneofthefamiliesthathadlosteverythinginthefloodandshesharedherhomewiththemuntilitwaspossibleforthemtorebuildtheirhouse. Anna’sfriendswereverypuzzled困惑whentheysawAnnadothis.TheycouldnotunderstandwhyAnnawantedtogiveherselfsomuchmoreworkandtroublewhenshehadalreadyquitealotofchildrentosupport.Lifewouldbeevenharderwhenanotherfamilyjoinedthem. "Well"Annaexplainedtoherfriends"attheendoftheFirstWorldWarawomaninthetownwhereIthenlivedinGermanyfoundherselfverypoorbecauseherhusbandhadbeenkilledinthewarandshehadalotofchildrenasIhavenow." "ThedaybeforeChristmasthiswomansaidtoherchildren’Wewon’thavemuchforChristmasthisyearsoIamgoingtogetonlyonegiftforallofusandIamsurewewillallbegladtohaveit.NowI’llgoandgetit.’Shecamebackwithalittlegirlwhowasevenpoorerthantheyandwhohadnoparents.’Hereisourgift’shesaidtoherchildren." "Thechildrenwereveryexcitedandhappytogetsuchagift.TheywelcomedthelittlegirlandshegrewupastheirsisterIwasjustthatChristmasgift./ WheredidAnnalive
ELastyearShanghai-bornCharlesK.KaoandtwoNorthAmericanscientistsgotthe2009NobelPrize诺贝尔奖inPhysicstogether.TheirworkmadetheInternetcomeintoanewage.Kao77wasborninShanghaiin1933.Heisfamousforfindingouthowtotransmit传输lightsignals信号overlongwaysthroughglassfibers玻璃纤维asthinasahumanhair.HisworkmakestheInternetinformationtransmitfasteraroundtheworld.Kaowasvicechancellor副校长oftheChineseUniversityofHongKongfrom1987to1996.Hedoesn’tworkandlivesinHongKongnow.TheChinesepeoplewerepleasedtolearnthegoodnews.ThepeopleofHongKongandIsendourcongratulationstoKaoonreceivingtheprize...Kaoisalsoatruegentleman.WearegreatlyproudtohavesuchanexcellentpersoninHongKong.ZengYinquanoncesaid.WillardBoyleaCanadianAmericanandGeorgeSmithoftheUnitedStatesgottheotherhalfoftheprize.WhichofthefollowingisNottrue
BWastecanbeseeneverywhereintheschool.Somestudentsaskformorefoodthantheycaneatandothersoftenforgettoturnoffthelightswhentheyleavetheclassroom.Theysaytheycanaffordthesethings.ButIdon’tagreewiththem.Wastecanbringalotofproblems.AlthoughChinaisrichinsomeresources资源weareshortof缺乏othersforexamplefreshwater淡水.Itisreportedthatwewillhavenocoal煤oroiltousein100years.SoifwegoonwastingourresourceswhatcanweuseinthefutureandwherecanwemoveThinkaboutit.Ithinkweshouldsaynotothestudentswhowastethingseveryday.Everybodyshouldstopwastingassoonaspossible.Inoureverydaylifewecandomanythingstopreventwastefromhappeningforexampleturnoffthewatertaps水龙头whenwefinishwashingturnoffthelightswhenweleavetheclassroomtrynottoordermorefoodthanweneedandsoon.Littlebylittleeverythingwillhechanged.Wastecanbestoppedonedayifwedoourbest.Whatmayhappenin100years
Onceamanandhiswifeworkedforanoldman.Therewasabigboxintheoldman’slivingroom.Theoldmanpointedtotheboxandsaid"There’sonlyonethingyou1do.Don’topenthebox."2sayingthishelefthishome.Thewomansaidtoherhusband"Theremustbe3expensiveinthebox.Let’sopenitshallwe"Herhusbandsaid4toher.Butthewomandidn’tgiveupher5.Onedayshedecidedtofindout6wasinit.Herhusbanddidn’tstopher.Sheopenedtheboxandlookedinside.Tohersurpriseshefoundnothinginthebox.Shetriedhardtocloseitbutshe7Thateveningtheoldmancamehomeandfoundtheboxwas8.Hewasvery9andaskedthewomanandherhusbandtoleavehishome."Buttherewasnothinginthebox"thewomansaid."Wehaven’ttakenanythingatall."Theoldman10them"TheboxisnotimportantbutIcannotbelieveyou.That’simportant! 第2空应选择
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