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解不等式组，并写出它的所有整数解．
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解不等式组并写出不等式组的整数解.
解不等式组并写出它的所有非负整数解.
解不等式组并写出不等式组的整数解.
解不等式组并写出它的所有非负整数解
解不等式组并写出它的所有整数解.导学号02052161
解不等式组并写出它的所有整数解.
解不等式组并写出它的所有整数解.
解不等式组并写出它的所有整数解.
解不等式组并写出它的所有整数解.
解不等式组并写出它的所有的整数解.
已知不等式组1求不等式组的解集并写出它的所有整数解2在不等式组的所有整数解中任取两个不同的整数相乘请
解不等式组并写出它的所有非负整数解的和
解不等式组并写出它的所有非负整数解.
解不等式组并写出它的所有整数解.
解不等式组并把它的解集在数轴上表示出来同时写出这个不等式组的所有整数解．
解不等式组并写出不等式组的整数解.
解不等式组并写出它的所有的整数解.
解不等式组并写出它的整数解.
解不等式组并写出它的所有非负整数解
解不等式组把解集在数轴上表示出来并写出不等式组的所有整数解.
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近日在重庆“服役”51年的牛角沱嘉陵江大桥开始大修了这座跨越了半个多世纪的大桥是重庆主城首座城市大桥也是市级文物保护单位．其中大桥桥面部分的施工是大修工程的重点之一主要是进行行车道板改造．工程将拆除桥面现有的混凝土行车道板更换为钢桥面板．请回答下列有关问题 1钢桥面板的主要材料合金填“是”或“不是”选择该材料的原因是填字母序号． A．密度大B．硬度大C．导热性好 2桥梁外表面由于处于潮湿和酸性大气中容易腐蚀生锈．请写出用稀硫酸清洗铁锈的化学方程式． 3如果你是桥梁维护人员请说出一种防止钢铁生锈的方法．
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下列图象能正确反映其对应操作的是
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如图是向氢氧化钠溶液中加入稀盐酸反应的微观示意图以下说法错误的是
Itwasourschool'syearlydancingshow.I1beexcitedthatIwaschosenbytheteacherthistimealthoughIdidn'thaveanyexperienceofdancingforashow.Iwoulddanceinfrontofallthestudentsand2teacher.Itmademeveryproud. HoweverIwasabitsad3myfatherhadnotimetowatchmedance.He4invitetohaveabusinessmeeting.Iknewthatmyfatherwouldsurelycometomyshowifhecould.5luckymymotherandmyeldersisterwerestillcomingtowatchmyshow. 6thebeginningofthedayIwasverynervous.AfterchangingintothedressandgettingmymakeupdoneIfelt7relax.ThenIwentontothestagebravely.Iwasverygladtoseemymotherandsistersittingin8secondrow. JustbeforethelightsturneddarkIsawmyfatherrushintothehallandtaketheseatbesidemymother.9apleasantsurpriseitwas!Thesightofmyfathermade10Ismile.Ibegandancingconfidently.Soonaftertheshowmyfamilycamebackstagetocongratulateme.Iwassohappyandluckytohavemyfamily'ssupport.
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假定你是李华你校英文报心理与健康栏目拟刊登一篇文章为高三备考的学生如何安排课余生活和释放心理压力提出建议.请你为此栏目写一篇英语短文要点如下: 1.高三学习的挑战和困难 2.如何安排课余生活 3.如何释放心理压力 注意:1.词数100左右; 2.可以适当增加细节以使行文连贯; 3.开头语已为你写好. LifeinSeniorThreeisnoteasy.
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如图是甲乙丙三种固体物质的溶解度曲线．下列叙述错误的是
InthesmalltownsoftheUnitedStatesinthe1nineteencenturythegeneralstorewas2everyoneboughtthethingshecouldn'tmake3growathome.Whatthestoressold4tellagreatdealabout5lifeatthattime.Peopleboughttoolsthattheyneededforfarmwork;saltsugarand6foodsthatthefarmdidn'tproduce;articlesofclothingthattheycouldn'tmake7;shirtsforthemen;orclothesforthechildren.Lifewassimplethen.Onefeelsthatpeoplewere8thankforwhattheyhadandthattheylookedforwardwithcourageto9thefuturebrought.Itwouldbeinterestingtoknowhowtheywouldfeelaboutthelifetoday.Woulditseemtothemthatlifeistoocomplex?Wouldtheyenjoy10livealifeaswedonow?
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ScientistsinArgentinahavecreatedtheworld'sfirstcowwithtwohumangenesthatwillenableittoproducehuman﹣likemilk. Geneticengineeringwasusedtointroducethemothers'milkgenesintotheanimalbeforebirthaccordingtotheNationalInstituteofAgribusinessTechnologyinBuenosAires. Asanadulttheclonedcowwillproducemilkthatissimilartohumansinwhatwillproveadevelopmentofgreatimportanceforthenutritionofinfantssaidtheinstitute.TheclonedcownamedRositaISAisthefirstintheworldthatincorporatestwohumangenesthatcontaintheproteinspresentinhumanmilksaidthestatement. TheArgentineteamsaidtheChineseonlyintroducedonehumangenewhiletheirresearchinvolvedtwomeaningthemilkwillmorecloselyresemblethatofhumans. Ourgoalwastoraisethenutritionvalueofcows'milkbyaddingtwohumangeneswhichdogoodtotheimmunesystemoftheinfants.saidAdrianMuttofromtheNationalUniversityofSanMartinwhichworkedwiththeinstitute. CristinaKirchnerPresidentofArgentinasaidthatthescientificinstitutemakesallArgentinesproud.Shealsorejectedthatshehadrejectedthehonourofhavingthecownamedafterher.TheycametotellmethatthenameisCristinabutwhatwomanwouldliketohaveacownamedafterher?ItappearedtometobemorepropertocallitRosita. 1WhydidthescientistsinArgentinaintroducetwohumangenesintotheclonedcow? A.BecausetheChineseengineersonlyintroducedonegeneintheirresearch. B.BecauseCristinaKirchnerPresidentofArgentinaexpectedthemtoincorporatetwogenes. C.Becausetwohumangenesenabledthecowtoproducemorenutritiousmilkfortheinfants. D.BecauseMuttofromtheNationalUniversityofSanMartinthoughttheycouldbethefirst toincorporatetwogenesinthecow. 2WhatcanbeinferredfromCristinaKirchner'sstatements? A.Shewasquitesatisfiedwiththeresearchdonebytheinstitute. B.Sheconsidereditanhonortonamethespecialcow. C.Shefeltitimpropertobenamedafterthecow. D.Sherefusedtogiveanametothecowoutofself﹣respect. 3WhichofthefollowingcanbestreplacetheunderlinedexpressioninParagraph4? A.havemorevarietiesthan B.bemoresimilarto C.havemorenutritionthan D.bemoredifferentfrom 4What'sthepassagemainlyabout? A.Theimportanceofgeneticengineering. B.Waystoimprovemother'smilk. C.Aclonedcowtoproducehuman﹣likemilk. D.AdvancedagriculturaltechnologyinArgentina.
“水培”是一种新型无土栽培其肥料是植物营养液下列营养液与草木灰草木灰显碱性混合使用后会降低肥效的是
“84”消毒液是生活中常见的物质主要用于杀菌消毒和漂白．如图为某厂家生产的“84”消毒液的商品标签 工业上一般用反应Cl2+2NaOH＝NaCl+NaClO+H2O生产NaClO．请回答 1计算该消毒液NaClO中氯元素的质量分数结果保留0.1%． 2生产1吨该消毒液至少需要多少千克烧碱 3某同学将50g含NaClO5%的“84“消毒液稀释至1%需向原溶液中加入多少克水
分类法在学习和生活都具有非常重要的作用下列物质属于氧化物的是
Alexis17satquietlyinthepassengerseatofherdad'scar.Shelethereyeslazilyscanthelandscapeforwildlife.Thenadeercameintoviewabout200yardsinfrontofthem.Dadthere'sadeerthere!Alexissaid.Itwasamaledeerwithsharpantlers角oneachsideofitshead. AsthecarmovedcloserAlexissawthatthedeer'sheadwasbenttowardtheground.Thensheheardascreamandsawanarmflyupnearthedeer'shead.Alexisrealizedthedeerwasattackingawoman.Suea44﹣year﹣oldmotherhadbeenoutforhermorningrun.Thedeerfollowedherandedgedcloser.IknewIwasintroubleSuesays.Shewenttopickupastickforself﹣defenseandthedeercharged.Itliftedherwithitsantlersandthrewherintotheair.Suecouldfeelbloodflewdownherleg.Withinsecondsthedeerhadpushedherofftheroad. WhenAlexisandherfatherpulledupthedeerwasthrowingSuelikeadoll.Alexislookedintothewoman'sterrifiedeyesandbeforeherfatherhadevenstoppedthecartheteenagerjumpedquicklyoutofthecarandrantowardthedeer.Iwaskickingittogetitsattentionshesays.Thenherfatherwhohadfollowedhisdaughterpushedthedeerawayfromthewomen. AlexishelpedSueintothecarandthenappliedapieceofclothtoSue'sinjuredleg.We'regoingtogetyoutoahospitalAlexissaid.Thensheheardherfathershoutloudly.Hehadbeenknockedtotheground.Alexistookholdofahammerfromthecarandrantowhereherfatherlayonhisback.Shebeatthedeer'sheadandneckbuttheblowsdidn'tscareitaway.Iwaslosingfaithshesays.AcouplemorestrikesAlexissaidherfather.Youcandoit.TurningthehammeraroundAlexisclosedhereyesandbeatthedeer'sneckwithallherstrength.Whensheopenedhereyesthedeerwasrunningaway.Alexisgotinthedriver'sseatandspedtowardthenearesthospital. AfterSuewastreatedshetearfullythankedherrescuers.Youexpectateenagegirltogetonthephoneandcallforhelpshesaysnottobeatupadeer. 1WhatwasSuedoingwhenshewasattackedbythedeer? A.Shewasdrivinghome. B.Shewasrestingontheroad. C.Shewastakingexercise. D.Shewasfeedingwildanimals. 2WhatdidAlexisdotosaveSue? A.Shepushedthedeeraway. B.Shehitthedeerwithherfeet C.Shedrovethecartohitthedeer. D.Shebeatthedeerwithahammer. 3WhichofthefollowingwordscanbestdescribeAlexis? A.Strong. B.Cruel. C.Energetic. D.Brave. 4Whatisthebesttitleforthepassage? A.AWomanWasSeriouslyInjured B.ADangerousDeerAttackedaWoman C.AGirlRescuedHerFatherSuccessfully D.ATeenagerSavedOthersfromaDeerAttack
氢气是目前最清洁的燃料请根据氢气制备原理及性质回答下列问题 1对图1装置图仪器名称描述正确的是请填字母序号． A．①为酒精灯B．B为分液漏斗C．C为锥形瓶 2实验室制取并收集氢气所需的仪器是选填以上装置图编号． 3图2是检验氢气的部分装置请问装置G的作用如果气流中存在氢气在装置H中观察到的现象是产生该现象的原因是请用化学方程式解释该反应物中具有还原性的物质是填化学式．
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