即a≤在x∈(I,+)时恒成立(5分)lnx1-lnx令p(x)=x∈(1,+∞),则p'(x)可得当x∈(1,e)时,p'(x)>0,当x∈(e,+)时,p′(x)0所以g'(x)在(0.e上单(11分)>(0所以存在唯当x∈(0,xg)时,g'(x)q所以h(a)=(17分)19.解析(I)因为f(x)=sinTx,所以令f(x)=0,可得πx=kπ,k∈Z,解得x=k,k∈Z(2分)则f(x)的所有正零点可表示为x=n,neN故a的通项公式为a=n(4分)(IⅡI)从a的前n项中随机选出不同的两项相乘,共有C=(5分)2设事件A=“不同的两项相乘,所得乘积为偶数”,则A=“不同的两项相乘,所得乘积为奇数”,可知P(A)=1-P当n为偶数时,前n项中有个奇数,个偶数,要使所得乘积为奇数,则两项均为奇数,易得当n=2时,P=1,(6分)当n>2时,即从个奇数中任取2个不同的奇数,共有C种方法
即a≤在x∈(I,+)时恒成立(5分)lnx1-lnx令p(x)=x∈(1,+∞),则p'(x)可得当x∈(1,e)时,p'(x)>0,当x∈(e,+)时,p′(x)0所以g'(x)在(0.e上单(11分)>(0所以存在唯当x∈(0,xg)时,g'(x)q所以h(a)=(17分)19.解析(I)因为f(x)=sinTx,所以令f(x)=0,可得πx=kπ,k∈Z,解得x=k,k∈Z(2分)则f(x)的所有正零点可表示为x=n,neN故a的通项公式为a=n(4分)(IⅡI)从a的前n项中随机选出不同的两项相乘,共有C=(5分)2设事件A=“不同的两项相乘,所得乘积为偶数”,则A=“不同的两项相乘,所得乘积为奇数”,可知P(A)=1-P当n为偶数时,前n项中有个奇数,个偶数,要使所得乘积为奇数,则两项均为奇数,易得当n=2时,P=1,(6分)当n>2时,即从个奇数中任取2个不同的奇数,共有C种方法
D.对顶角相等5.如图,直线a//b,将含有30°角的直角三角尺按如图所示的位置放置,若L1=25°那么L2的大小为A.35°B.45°C.55°D.60°
考不凡(1)该瞬时冲量的大小I;on(3)木板的最小长度L。Km·s-10.25乙弥封考不凡小程序线考不凡内考不凡不要答题
1.C2.A3.D4.B5.C6.C7.B8.A9.D10.D10题解析:当慢慢拉B物体时,由于细绳a在上端,所受到的拉力始终比b要大,所以a先断;当猛拉物体B时,由于物体A具有惯性会保持原来的静止状态,在A还没有来得及改变原有的静止状态时,绳子b就已经断了,所以b先断;故D符合题意。11.作用点用扳手拧螺丝(合理即可)12.竖直向下左13.弹性等于14.加速72015.惯性保持静止16.(1)①6.86②A(2)①0.05②不能③1.817.(1)速度(2)大(3)慢(4)匀速直线运动(5)不是改变18.(1)水(2)相反大小相等(3)转动回来不在同一直线(4)同一(5)②19.解:(1)由G=mg可得嫦娥六号探测器的总质量:-G_8.2x10N_=8.2×10²kg (2分)mg10N/kg(2)着陆器在地球上受到的重力:G着地= m着g=1.8×10²kg×10N/kg= 1.8×10*N(2 分)1g10N/kg(2)120袋水泥的总质量m水泥=120×50kg=6×10²kg这辆卡车和水泥的总质量m总=m+ m水泥=5×10²kg+6×10²kg=1. 1×10*kg(3)由图可知限重质量m限=10t=1×104kg超载的质量为m超=m总-m限=1.1×10*kg-1×10*kg=1000kgm袋50kg/袋CS扫描全能王3亿人都在用的扫描App
1、高中2025届名校大联盟·高三月考卷(八)8历史试题2、三晋卓越联盟·山西省2024-2025学年度高二10月联考(25-L-170B)理数试题1、广东省2025届高三摸底测试(8月份-5012C)数学试题1、金太阳·云南省2024-2025届高三年级开学考(25-10C)化学试题3、炎德英才大联考(一中版)长沙市一中2024届高三月考试卷(七)7历史试题1、炎德英才大联考 长沙市一中2024届高三月考试卷(二)2历史答案【答案】【解析】【答案】【解析】【答案】2、炎德英才大联考·长沙市一中2024届高4、2025年高考单科综合模拟信息卷(六)历史试题1、2025届名校大联盟·高三月考卷(二)地理试题1、高中2025届名校大联盟·高三月考卷(一)1语文答案1、2024届名校大联盟·高三月5、2024届名校大联盟·高三月考卷(六)6化学(新教材-JG)试题1、2024届名校大联盟·高三月考卷(六)6化学(新教材-JG)答案1、4湖北圆创湖北省高中名校联盟2024届新高三第一次联合测评化学试卷答案①
19.阅读材料,完从,或者馈赠给材料一主向其附庸授1950年开中国经济后,中国的杂—摘编自贾灿灿《宋代乡村居民的职业流动——以笔记小说为视角的考察》材料二方世界“不是民地。运送家的帮助下,亚的丝绸、瓷才,丰富和繁材料二二战后,著名的出口书籍出版节目中,美国补它的空摘编自田培栋《明代社会经济史研究》处、繁荣、民1966年,福牛业流动的原因人8分)(2)根据材料二,指出明代中后期农民营生观念的变化。(6分)合马歇尔计18.阅读材料,完成下列要求。(12分)国战略(1)根据材料材料而让(2)根据材料《退想斋日记》收录了中国近代地方史学者、山西太原县乡贤刘大,鹏从1891年至1942往。18年的日记。以下为其中的日记片段:20.阅读材料,完表5材料编号日记片段马克思南非在东方和斯口的、囊括了旁民血肉淋漓之所致耳入、作为农AmaAH今改民国是年,而予称年号仍系宣统,以予系大清之人,非民国之人耳②了资本主义中产生;从依据材④本心之良泪没殆尽,因为万世之罪人身述。(要求:(6分)【高三历史第5页(共6页)】·JX·
foreignerswith transit visa-free privileges(特权)622(stay)up to240hours,which isagreatconvenience for internalional travelers. With the visa-free policy in place,many tourists can nowenjoy a more flexible travel schedule to explore multiple cities within the permilted lime.63is interesting lo nole that in bustling metropolises like Shanghai and Beijing, foreignlouristshave even doubled innumber,64(bring)new vitality to the local tourism indushry.The interactions between local residents and foreign tourists are quite 65 ( harmony). The localresidents are always delighted tomeel visitors from different countries and share their local cultures.第四部分写作(共两节,满分40分)第一节(满分15分)假定你是学生会主席李华,你校的视力检查结果显示同学们的视力状况不容乐观。请你写一封倡议书,发表在校英文报上。内容包括1.介绍视力检查结果;2.分析导致视力下降的因素:3.提出保护视力的建议注意:1.写作词数应为80个左右2.请按如下格式在答题卡的应位算作答。Dear fellow students,The Student Union第二节(满分25分阅读下面材料,根据其内容和所给段落开头语续写两段,使之构成一篇完整的短文。I run a photography studio in the hear of the cily, specializingin children's porraits. Fromhigh-end modeling shoots lo heartwaming sibling photos and lovelybinh announcements,we coverit allOur studio is always busy,andns is stuted on oubste,we donI accept walk-ins.Wihbookings scheduled six months in advance,it'snen-sopOne evening, just ten minutes beforeclosing,a mother walked in with a young girl,aroundsix or seven years old,follwing her.I fellquile annoyed—I really needed to close up.that moment,he lile girl peeked ou from behind hermother's legs,hereyes scanningnervouslyaround the room.She glanced at the beautiful portraits ofhealthy,smiling children hanging on thewalls,and the expression er face was u mix of longing and self-consciousness.s.sheseemed 1oknow she didnt look like The otier kids in the photos.Under her thick wintecoat and hat, shelooked weak, with dark circleunder her eyes. She had no hair,and a jube was taped to hercheek,feeding into her nose.Itwaslear she was very ill.The mother continued, her voice shaking,“My daughter saw one of your photos at thehospital. She used to be such a beautiful and lovely girl as those in your photos hanging on thewalls,but she doesn't look her best right now...Sir, I know you're booked up, and the nextappointment is months away, but I don't know.." She started to cry. I realized that wailing formonths was nol a bet for this litle girl. Seeing she held her mother's hand tightly, I felt my hearlsoften.注意:1.续写词数应为150个左右;2.请按如下格式在答题卡的相应位置作答。I took a deep breath and smiled genlly al the litle girl,making up my mind to do something.The little girl looked at the photos with a bright smile.英语试题第8页(共8页)
growing up around there kept coming by to 54 if Mr. Calvin was still aroundD.separatedMr.Cain hadn't assumed what he'd 55 for me He was the quietest hero I ever metC.keptB.boughtD.tolerate41.A changedC.mindB likeD.attracted42.A suggestC.savedB.cheatedD.put up with43.A. measuredC.called offB.thought aboutD.information44. A. came up withC.achievementB.researchD.exposed45.A honorC.comparedB.connectedD.carefully46.A tookC.quicklyB.sadlyD.unexpected47.A awfullyC.simpleB.common48.A relaxingD.behaveC.studyB.remain49.A appearD.anxietyC.embarrassmentB.annoyance50.A astonishmentD.creativeC.generousB.different51.A smartD.skillC.nameB.secret52.AwordD.advisedC.hiredB.allowed53.A. forcedD.discussC.showB.prove54.AaskD.explainedC.doneB.chosen55.A.collected第二节(共10小题;每小题1.5分,满分15分)8阅读下面短文,在空白处填人1个适当的单词或括号内单词的正确形式。56##importantThe Zhangzhou Ancient City,withahistory ofmore than00yearsisbirthplace of the Hakka culture, rooted in migrants in southern China57(dynasty)The commercial prosperity(繁荣)of the Tang,Song,Ming and Qingleft a historical mark A visit to the historic city would not be complete without 58(experience)59 have a history of more than 1,000 years.its famous glove puppet(手偶) shows,Members of the 2024 A Date with China tour watched the puppetry 60 (perform),Daning Prefecture,on May 19,featuring traditional stunts(特技) such as lion dancing andmartial arts.After the shows,French photographer Jeremy Walter Grinan said,We felt 61(amaze) tosee it.After a minute or two, you'll find 62 (you) laughing unconsciously. There are nodigital special effects and no modern technology,yet it's still very entertaining.Perhaps it‘'sbeen so 63 (enjoy) for over a thousand years."Moreover,Zhangzhou Ancient City hosts a lot of cultural heritages,including puppethead carving and paper-cutting. The old town also 64 (contain) a wealth of historical andcultural landmarks. Among them are three nationally protected sites: the Grand Hall ofConfucius Temple, the Stone Archway of the Ming Dynasty 65 the Zhangzhou Lin FamilyAncestral Hall.第四部分写作(共两节,满分40分)第一节(满分15分)你班将于下周五举行英语主题班会,主题为“Protecting Our Earth,Starting fromUs”请你写一篇发言稿,内容包括:1.保护地球的重要性;2.个人保护地球的措施;3.呼吁大家保护地球。【高三一轮复收官卷(二)·英语第7页(共8页)】
①所得样品中亚硝酸钠的质量分数为(填百分式,保留三位有效数字)。a.整个滴定操作过慢,用时过长c.读数时,滴定前俯视,滴定后仰视d.滴定终点时未等30秒立即读数HSO4MnO2氨水Na2SNHHCO硫化锰矿溶浸氧化调pH除杂沉锰MnCO3MnO2粉滤渣1滤渣2滤渣3CO2A13+Fe3+金属离子M+Fe2+Zn2+Ni2+Mn2+3.41.56.36.2开始沉淀的pH6.98.14.72.88.3沉淀完全的pH8.28.910.1回答下列问题:(1)基态锰原子的价层电子排布式为(2)硫化锰矿预先粉碎的目的是(3)“氧化”中MnO将Fe2+氧化成Fe+的离子方程式为≤pH

7数学试题)
7数学答案)
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7物理答案)
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