首页
试卷库
试题库
当前位置：
X题卡
>
所有题目
>
题目详情
李老师想在网上书店买书，A店打七折销售，B店满89元减19元．如果李老师想买的书总价是100元． （1）在A、B两个书店买，各应付多少元？ （2）在哪个书店买更便宜？便宜了多少钱？
查看本题答案
包含此试题的试卷
教案备课库《》真题及答案
点击查看
你可能感兴趣的试题
苏宁家电商场周年店庆高促销销售豆浆机采用折上折方式销售即先打七折在此基础上再打九五折．国美商场购物
爸爸想在网上书店买书A店打七折销售B店满69元减19元．如果爸爸想买的书价为160元． ①在AB
爸爸在网上书店买书A店七折优惠B店满50元减14元如果爸爸想买本80元的书那个商店更优惠呢
某品牌的饮料促销方式如下甲店打七五折乙店满三送一丙店每满100元减30元．李老师要买30瓶标价9元
甲
乙
丙
无法确定
苏宁家电商场周年店庆高促销销售豆浆机采用折上折方式销售即先打七折在此基础上再打九五折．国美商场购物满
李老师准备在网上购买一套衣服A店打七五折优惠B店满100元减30元如果这套衣服的标价都是420元．在
李老师在新华书店看到一本英语字典打九折出售是81元．经过还价营业员同意打八折卖给了李老师．李老师买这
某品牌搞促销活动在甲商场满200元减60元方式销售乙商场打七折销售小亮买一件标价240元的这种品牌
爸爸想在网上书店买书A店打七折销售B店满69元减19元如果爸爸想买的书标为80元．1在A．B两个书店
商场开展店庆活动一台冰箱打七折后是1400元这台冰箱原价多少元
三家文具店出售的作业本的价格都是每本0.5元但是三家店都有不同的促销活动皮皮文具店一律打九折．乐乐
爸爸想在网上书店买书A店打七折销售B店满69元减19元如果爸爸想买的书标为80元． 1在A．B两
双十一期间一种运动鞋搞促销活动在A商场打七折销售在B商场满100元减30元的方式销售．叔叔准备给小东
满100元减30元就是打七折．判断对错
李老师要为学校购买65个小足球三个商店的定价都是80元一个．甲商店打七折出售乙商店降价10%以后买
联华超市迎五一进行促销可乐4元一瓶满40元减10元．大润民超市的可乐也是4元一瓶打七折销售．六1班要
服装店里满400元返100元团购餐卷购79元餐卷可抵100元现金理发店办500元会员卡可享受八折服务
①②
①③
①④
③④
90年代以后我国开始出现的新式图书零售机构有等
兼营书店
连锁经营店
网上书店
专业书店
邮购书店
联华超市迎五一进行促销可乐4元一瓶满40元减10元．大润民超市的可乐也是4元一瓶打七折销售．六1班
满减促销和打折是一回事例如满100元减30元实际上就是打七折．．判断对错
热门试题
更多
曲线与直线所围成的封闭图形的面积为
定义在R上的函数fx满足fx＞﹣1且2fx+f'x＞﹣2其中f'x是fx的导函数则不等式ln[fx+1]＞1﹣2x的解集为
若函数在区间24上不单调则实数a的取值范围是
古印度“汉诺塔问题”一块黄铜平板上装着ABC三根金铜石细柱其中细柱A上套着n个大小不等的环形金盘大的在下小的在上．将这些盘子全部转移到另一根柱子上移动规则如下一次只能将一个金盘从一根柱子转移到另外一根柱子上不允许将较大盘子放在较小盘子上面．若A柱上现有3个金盘如图将A柱上的金盘全部移到B柱上至少需要移动次数为
曲线y＝ex+x在点01处的切线方程为．
△ABC的内角ABC的对边分别为abc已知． 1求A 2若且D是BC上的点AD平分∠BAC求△ACD的面积．
8分Starfishareamongtheocean'smostrecognizableresidents.Theirbrightcolorsandfamiliarshapemakethemeasytoseeneartheshore.ButinJune2013diversalongtheshoresofWashingtonStateonthewestcoastofAmericanoticedthatthestarfishlookedstrange.Thecreatures'armsweretwistedorfallingoff.Whitepatchescoveredthestarfish. Theanimalsweresufferingfromaprocesscalledwastingsyndrome消耗症.Thebodiesofthestarfishlosetheirfirmshapeandturnsoft.Withindaystheirorgansmeltandthestarfishbecomesnothingbutapileofgoo粘稠物.Scientistsdon'tyetknowwhat'scausingthisphenomenontooccur. PeterRaimondiamarinebiologistisstudyingtheoutbreakofit.It'swidespreadhesays.It'sveryharmfulandit'sunlikeanythingwe'veseeninthepast. Alsoknownasseastarsstarfisharenotactuallyfish.Theyhavenospine.Theyaremorecloselyrelatedtourchins.Seastarscanbefoundintidepoolsneartheocean'sedge.Tidepoolsarerockyareaslikeshallowoceancanyonsneartheshore.Starfishmusselskeepingthosepopulationsincheck.Forsomebiggerfishthestarfishisamainsourceoffood.Researchersworrythatiftoomanystarfishweretodiefromthediseaseotheroceananimalscouldalsobeharmed. Marinebiologiststrytogettothebottomofthemystery.Wildlifegroupsanduniversitieshavejoinedtheeffortinvestigatingeverythingfromoceantemperaturestothetypesofbacteriainthewater.Scientistsfeartheoutbreakisjustbeginning. 1Accordingtothepassagestarfishwithwastingsyndromewilleventually. A.becomeapileofgoo B.bestillinshape C.becomearmless D.havetheirorgansfalloffthemselves 2Whatdoweknowaboutstarfish? A.Theybelongtoonespeciesofseafish B.Theyliveinpoolswithalotofsand C.Theyhelpkeepbalanceinoceanecosystem D.Theyareoftencarriedtotheshorebystorms 3Thelastparagraphimpliesthat. A.starfishareeasilyaffectedbybacteria B.biologistshavefoundthemysteryofstarfishdisease C.oceantidewavescausestarfishtodie D.amoreseriousdisastermaybeontheway 4Whatmightbethemostsuitabletitleforthepassage? A.StarfishAlongtheWestCoastofAmericaFaceaDeadlyDisease B.StarfishinthePacificOceanNearlyDieOut C.StarfishGetSickBecauseoftheOceanTemperature D.StarfishDieSuddenlyinthePacificOcean
苹果除可直接食用外还可将其制成饮品如苹果汁苹果酒苹果酯等．回答下列问题 1在制作苹果汁时为了提高出汁率和澄清度常添加果胶酶这是分解果胶的一类酶的总称包括和果胶酯酶等． 2从微生物培养的角度分析苹果汁能够为酵母菌的生长提供的成分有．苹果汁发酵产生苹果酒的过程不需要严格的消毒处理原因是． 3醋酸菌常用于苹果醋的制作在分离优质醋酸菌时若想对醋酸菌进行计数则应用稀释涂布平板法在培养基上进行接种平板划线法一般不用于活菌计数的原因是．计数时通常以菌落数在30～300的稀释度来计算细菌含量原因是．
科学工作者在温度水分等适宜条件下测得番茄叶绿体色素吸收光能的情况如表所示．回答下列问题 1叶绿素分布在叶肉细胞的具体部位 2如果将番茄由600nm波长的光转为670nm波长的光照射后叶绿体中C3的量会填“増加”“减少”或“基本不变”原因是． 3当植物缺乏Mg时叶绿素a吸收的光能百分比大量减少原因是． 4如果将环境温度降低植物对光能的利用能力填“增强”“降低”或“基本不变”．
已知函数fx在R上是增函数设则下列不等式成立的是
已知函数fx＝sinωx0＜ω＜2的图象关于直线对称则
10分Thefamilyiswhereachildlearnswordsandtheirmeanings.Whatyousayandhowyousayithasanimportanteffectonhowyourchildwillviewhimselfandhisworld.1Theircriesletthefamilyknowthattheyarehungrytiredorneedtobeheld.Thefamilyiswhereachildlearnstounderstandandtoexpresshiswantsneedsfeelingsopinionsandideas. Includeyourchildinconversationsfromtheverybeginning.Helpyourchildinconversationfromtheverybeginning.Helphimjoinin.Atfirstthesoundsarebabbling咿呀声.2Familieswhoinvolvetheirchildreninconversationgivetheirchildrenimportantpracticeincommunicationandsocialskillsaswellasabetterchanceforfuturesuccess. 3Talkaboutwhatyoudidwhatyouaredoingandwhatyouplantodo.Provideyourchildwithwordsforhisfeelings.Helphimtostatethem.AchildwhocansayIamdisappointedorIamreallyhappycansharemoreabouthisworld.Achildwhocanusewordswillfeelmoresafe.Encourageyourchildtospeakupandaskquestions.4 5Fromthetimetheyareverystrongtheycantellwhenadultsareabsent﹣mindedornotlistening.Iftheythinktheirpartoftheconversationisbeingignoredtheybecomemad. Takethetimetobuildcommunicationwithinyourfamily.Thinkaboutthewordsyouuseandtakethetimetotrulylistentowhatisbeingsaid. A.Letyourchildtalkonthephone. B.Giveyourchildwordsforeverything. C.Thenslowlythechildlearnstojoinin. D.Focusonyourcommunicationwithchildren. E.Youngchildrenespeciallyliketoseetheirwordsinprint. F.Thisisawaytolearnmoreabouttheworldandcontributetoconversation. G.Babiescommunicatetheirneedsandwantsfromthefirstmomentsoftheirlife.
重庆市2018年9月入学的高一学生将实行新高考同学们在高一时先要根据自己的理想学校理想专业结合自己的学科思维特点进行选科语文数学英语是必选学科同学们需要先在物理和历史中选择一个学科现甲乙丙三名同学根据自己的情况做选择他们选物理的概率分别为且这三名同学是否选择物理学科相互独立． Ⅰ求这三名同学中恰有一人选物理的概率 Ⅱ设这三名同学选择物理的人数为随机变量X求X的分布列与数学期望．
设mn为两条不同的直线αβ为两个不同的平面则下列结论正确的是
在的展开式中所有项的二项式系数和为128则n＝
已知椭圆O00P31斜率为﹣1的直线与C相交于AB两点若直线OP平分线段AB则C的离心率等于．
＝
已知函数fx＝x﹣1ex﹣ax2在点1f1处的切线平行于x轴则a＝
15分Whenshoesaremadetofityourfeetandnobodyelse'stheyarecalledbespokeshoes. TherearenowonlyfivecompaniesinLondonwhichstillmake1traditionbespokemen'sshoes2surprisinglybespokeshoesforwomenaremadeinParis. Bespokeshoesaremadeinexactly3samewayastheywereonehundredyearsagoasthetechnologyiscompletely4change.Itwilltakesthreemonths5makethefirstpairofshoesforacustomerwhomustcomeinforatleastthreefittings试穿. Theprocessisasfollowsyouputyourfoot6asheetofpapercalledabookandtheshoemakersdrawalinearound7.Fourmeasurementsaretakenheeltotoethewidthatthe8widepointaroundtheinsteptheinsteptoheel.Thisisthefirstfitting.Nextawoodenmodelofyourfootismadecalledalast.Thentheleatherworkbegins. Thedesignsliketheprocess9remainthesameinthelastcentury.Itisnotthatnewfashionscouldnotbeintroduced10thatthecustomersdonotwantthem.Theywanttheirshoestobemadeastheywereonehundredyearsago.
如图在四棱锥P﹣ABCD中PA⊥平面ABCD底面ABCD是菱形AB＝2EF分别是棱PCAB的中点． 1证明EF∥平面PAD 2求三棱锥C﹣AEF的体积．
双曲线﹣＝1的渐近线方程为
25分外国语学校艺术节即将来临学生会将举办剪纸和十字绣比赛参赛人可以任选其一.假如你是学生会__李华请用英语写一篇书面通知号召大家踊跃参加. 内容包括 1.举办此次活动的目的 2.交作品截止时间十月十六号星期一 3.作品展览的时间和地点星期三下午校图书馆 4.交作品时附上作品说明创作灵感和作品含意. 参考词汇剪纸paper﹣cutting十字绣cross﹣stitch 注意1.词数100左右2.开头语已为你写好. TheCampusArtFestivalisontheway. Yours LiHua.
人在饥饿时遇到寒冷刺激身体会立即发生一系列生理反应如表现出面色苍白全身颤抖等．下列有关的叙述错误的是
每年农历五月初五是我们的传统节日“端午节”今年端午节小刚的妈妈煮了7个粽子其中2个腊肉粽5个蛋黄粽小刚随机取出2个则在取到的2个粽子为同一种的条件下取到的2个粽子是蛋黄粽的概率等于
已知抛物线Cx2＝2pyp＞0的焦点为F准线为l点A∈CA在l上的射影为B且△ABF是边长为4的正三角形． 1求p 2过点F作两条相互垂直的直线l1l2l1与C交于PQ两点l2与C交于MN两点设△POQ的面积为S1△MON的面积为S2O为坐标原点求的最小值．
已知函数有两个零点则a的取值范围为
2019年2月我国多地持续低温引发很多人感冒医学工作者为阻止感冒蔓延研制出流感疫苗A和药物B．回答下列问题 1人体抵御流感病毒的攻击有三道防线其中第道防线属于非特异性免疫． 2流感疫苗A在短期内能够有效预防流感在免疫中疫苗相当于填“抗原”或“抗体”其作用是． 3某同学因发烧就诊医生为他注射了一定量的药物B几天后未见好转再次就医注射少量的B时该同学很快发生了呼吸困难等过敏反应过敏反应的特点有． 4为探究药物B的作用以小鼠为实验材料将年龄体重等均相同的小鼠随机均分为两组先用同种流感病毒感染两组小鼠然后一组注射药物B另一组注射等量的生理盐水3天后测得的实验结果如图所示 根据以上实验结果推测药物B在这段时间的作用是．
设随机变量X服从正态布N1σ2若PX≥2＝0.2则PX≥0等于
8分Thereissomethingaboutsharedpainsthatcanbringtwopeopleclosertogether.Inthiscasethetwopeopleweremydadandmeandthepainswereacanoerace. MyparentssplitupwhenIwasyoung.IendedupmovingtothecitywithmymomandmysistersoIdidn'tgettoseemydadnearlyasoftenasIwouldhaveliked.SummerwasgreatbecausemysisterandIspentseveralweeksvisitinghim.Wewouldgofishinghorsebackridinghikingcampingandcanoeing.Thequantityoftimewespenttogethermayhavebeenlowbutthequalitywasalwayshigh. Iwasfifteenandnotanathletesoactuallyusingmymusclestoengageincompetitionwasanewexperience.MydadandIhadspentmanyanhourinthecanoebutnotinfast﹣flowingwaterandneverinahurry.Isizeduptheothercanoeracers.Therewaslittledoubtthatfirstwouldbetakenbythetwomenwiththehigh﹣techcanoethatlookedfastjustsittingthereonthebeach.Iwasalsocertainthatsecondbelongedtomydad'sGermanfriends.Thelastofoutcompetitorswasanotherfather﹣sonteamandweseemedtobeevenlymatchedinphysicalsizeandqualityofwatercraft. Soonaftertheracegotunderway.Iduginwithallmystrengthinthehopethatwewouldn'tbethelastonesacrossthefinishingline.MydadandIpouredonthegasandwetookoverthirdplace.Iwasdeterminednottoloseitwe'dfoughthardtomakeitthatfarandIhadthesensethatmyarmscouldlasttherestoftherace.Therewasnoquestioninmydad'swould.Iwashappy. WegotacrossthefinishinglineandmydadandIsharedabearhug.ThenhesaidThatwasfun.Andhewasright.Itwasfun.AnhourlaterIwasfeelingsoreandexhaustedandworkingmywaythroughmythirdhotdogwhenmydadcameuptome. 1WhatdoestheunderlinedsentenceinParagraph4mean? A.Theymadegreatefforttospeedthecanoe. B.Theypouredpetrolintothecanoe. C.Theyfilledthecanoewithair. D.Theywavedtotheracersintheair. 2WhichofthefollowingstatementsinNOTtrue? A.Fourteamsparticipatedinthecanoerace. B.Theauthorfulfilledhisoriginalgoalatlast. C.Theauthor'sGermanfriendsprobablywonsecondplace. D.Theauthorwaswornoutandhungryaftertherace. 3Itcanbeinferredfromthepassagethat. A.theauthor'sparentssplitupwhenhewasyoung. B.theauthorgotalongwellwithhisfather C.theauthorwasanexcellentathlete. D.theauthor'sfatherdidn'twanttojoininthecanoerace 4Whatisthemainideaofthepassage? A.Thequalityoftimepeoplespenttogethermatters. B.Thestrongwillpowerhelpsyousucceed C.Thetimespentwithone'sfatherbringshappiness. D.Thesharedpainsbringpeoplecloser.
已知函数f'x是fx的导函数 Ⅰ求f'1的值 Ⅱ求函数fx在[﹣22]上的最大值与最小值．
热门题库
更多
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
高一上学期英语
高一下学期化学
高一下学期物理
高三下学期数学
高三上学期数学
高一下学期英语
教案备课库
高一上学期生物
高一下学期生物
湘公网安备 43130202000226号