高三限时练
2023届高三考前限时热身练习(含答案)
高三限时热身练（阅读知道+七选五+语法填空+运用文写作+读后续写）时间：65分钟一、阅读知道ⅠFind your new favorite West End musicals, from heartwarming adaptations and award-winning scores to extremely funny musicals and must-see London shows.1．The Phantom of the Opera is special because of its .A．excellent costumes B．experienced actorsC．attractive story D．beautiful songs2．Which of the following musicals would most probably catch the eye of both kids and adults?A．The Phantom of the Opera. B．Matilda The Musical.C．School of Rock. D．Thriller–Live.3．What is the main purpose of the passage?A．To analyze musicals. B．To criticize musicals.C．To advertise musicals. D．To evaluate musicals.ⅡMost people find sugar hard to resist. Our big brains need lots of energy and sugary foods provide plenty of it. But when calories are too readily available, it is easy to overdo it.There has been no shortage of research on sugar substitutes that trigger a sweet sensation without the calories, but these alternatives also taste slightly bitter for many people. W hat’s more, evidence from animal and human studies has linked some to glucose intolerance and weight gain.One promising alternative is found in the fruit of Synsepalum dulcificum (奇妙果), a plant native to West Africa. These miracle berries don’t taste suga ry themselves, but if you try something sour afterward, it will taste miraculously sweet. In Benin, the fruit is eaten fresh and is mostly used as a sweetener to have with sour foods and drinks. The berry is appreciated by local consumers, especially the kids and people with diabetes who use it as a substitute for synthetic sugar.The chemical, a protein named miraculin, was identified in 1968 and a team in Japan discovered how it works in 2011. At neutral pH, miraculin is an antagonist to our sweet taste receptors, meaning it blocks the taste of sweetness. But in the presence of an acid, miraculin changes shape and is able to activate the receptors.Despite the miracle berry’s promise as a sugar substitute, it is only produced on a smallish scale and isn’t available worldwide. The berries don’t travel well and the plant is slow to grow and mature.To create an alternative source of miraculin, researchers in Japan have genetically engineeredtomatoes to produce the protein, while another team is working on increasing the production of miracle berries in West Africa. Earlier 202X, a team in China published the genome of Synsepalum dulcificum. A Spanish start-up plans to promote sustainable cultivation of the plant in Ghana and market the dried berries as a food supplement.；4．What is special about Synsepalum dulcificum as a sugar alternative?A．It contains many calories itself. B．It makes sour food taste sweet.C．It will gain weight and cause disease. D．It does good to kids and diabetic patients.；5．How do the miracle berries work on sour food?A．By changing the pH of a food. B．By increasing its sugar content.C．By producing shape-variable miraculin. D．By weakening the sweet taste receptors.；6．What does the underlined word “antagonist” probably mean in Paragraph 4?A．Enemy. B．Assistant. C．Factor. D．Receiver.；7．Why are the miracle berries hard to get?A．They are only locally available. B．They cannot be grown elsewhere.C．It is expensive to transport them. D．It takes long to harvest a small amount.二、七选五阅读How to make a successful apology. Have you done something that you feel bad about? Is there a person who you have treated badly? Do you need to say “I’m sorry” to someone? Here are five things you can do to have a successful apology.● Make your apology real. 8 People can tell if you take responsibility for what you did or if you are lying.● Do not make excuses. 9 It is saying that you were wrong to do it.● 10 An apology should show that you have learned from what you did. Show that you mean what you say.● Make it clear that you are apologizing. Just saying “I’m sorry” is not enough. Talk about what you did and then say that yo u feel bad about doing it. 11● Be prepared for the unexpected. Be prepared for it to take some time for you r apology to be accepted. This may be a long moment, a few minutes, or even days or weeks. The person may stay angry with you. 12A．Be patient and hopeful.B．Make a promise to change.C．Choose the right time to apologize.D．An apology will be better accepted if it is sincere.E．An apology is not explaining why you did something.F．You can give your apology to the other person as a letter.G．It is important that the person knows you are apologizing.三、语法填空阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确情势。
山东省烟台市牟平第一中学2025届高三上学期限时练语文试题及参考答案
山东省烟台市牟平第一中学2025届高三上学期限时练语文试题及参考答案22级高三上学期第二次语文限时训练一、现代文阅读(35分)(一)现代文阅读I (本题共5小题，18分)阅读下面的文字，完成1~5题。
材料一：中国人说中国话，用汉语写作，可是我们了解自己的语言吗如果不了解，如果我们超越汉语的表达界限说话，会出现怎样的情形呢长期以来，我们总是一厢情愿地设想，西方语言固有的成分，汉语中也一定或明或暗地隐藏着，最害怕被西方人说汉语是一种蒙昧的语言。
冯友兰先生的意见，就代表了这样的立场，他说中国哲学与西方哲学是古今之争。
换句话说，中国哲学之所以“落后于”时代，是因为汉语“落后”;但是，按照这样的逻辑推论，汉语永远不得不落后，除非汉语成为拼音文字。
与其说汉语与拼音文字之间，中国哲学与西方哲学之间，是人类古代语言与现代语言或原始思维与现代思维之争，不如说它们之间仅仅是一种空间上的并列关系，彼此相互外在，互不附属，一点儿也不像。
所谓“先进”与“落后”的断语之所以不中用，是因为这个标准来自西方。
举个例子来说，按照西方语言和语法标准分析汉语，往往就要说外行话，因为这个分析的工具不中用。
“中国言语的构造上主语(subject) 与谓语(predicate) 的分别极不分明，换言之，即可以说好像就没有这个分别。
这是中国言语构造上的最特别处，而其影响则甚大”(张东荪)。
既然汉语几乎就没有主语与谓语的分别，那么当我们硬说有这个分别时，就好像“使中国文法亦穿了一套西服”(张东荪)。
有怎样的害处呢蒙蔽了汉语的特性或者说“面貌”,就像即便穿着笔挺的西装，相貌却还是中国的，无法蒙人。
张东荪先生援引了高本汉所分析的例句：Albert's mother gives him cakes.这个英文句子中哪个词是主语，几乎一望便知，拉丁文和希腊文中的句子，也是如此。
当高本汉认为西方语言是一种进化了的语言时，张东荪却一针见血地指出：“中国言语与外国言语是构造上的不同，无所谓进化与不进化。
高三限时训练题一 试题(共14页)
2021届淳中高三语文(yǔwén)限时训练题一一、〔18分，每一小题3分〕1．以下词语中加点字的读音完全一样的一组是〔〕A．俊．秀逡．巡开工．．峻．峭疏浚． B．刨．床炮．烙冰雹．咆．哮皮袍．C．浦．口果脯．黄埔．花圃．铺．子 D．嶙．峋遴．选麒麟．磷．肥鳞．片2．以下各组词语中没有错别字的一组是〔〕A．扫瞄涣然冰释以老卖老树倒猢狲散B．吃俭用绿草如茵解铃还须系铃人C．濒临平心而论安排就绪胳膊钮不过大腿D．证券伸张正义乌烟障气捅了马蜂窝3．依次填入以下各句横线处的词语，恰当的一组是〔〕①广阔的教育工作者要用极大的耐心去教育学生，不能因为你们的忽略而＿＿了他们的自尊心。
②惩治腐败，打击贪赃枉法，＿＿＿HY分子是当前政法工作的首要任务。
③世界各国之间发程度的不平衡，＿＿＿表现为一种经济差距和技术差距，＿＿＿表现为知识差距和教育差距。
A．伤害揭露既／也B．损害揭露不仅／而且C．损害揭露既／也D．伤害揭露不仅／而且4．以下各句中加点(jiā diǎn)的成语或者熟语使用不恰当的一项是哪一项〔〕A．嚼过的馍不香．．．．．．，你假如真有才能，也搞出点自己的东西来，那才叫人佩服。
B．继马德里遭HY袭击以后，伦敦可能将成为“基地〞组织的下一个袭击目的，这种说法绝不是危言耸听．．．．。
C．七股大水,从水库的桥孔跃出,飞短流长．．．．,仿佛七幅闪光的黄锦，直铺下去。
D．这姑娘是个好姑娘，人勤快，针线锅灶都能拿得起．．．，跟邻居没有一句．．．，放得下闲话。
5．以下各句中没有语病的一句是〔〕A．从1月27日广西发生第一起高致病性禽流感疫情，到3月16日最后两个疫区解除，在蔓延亚洲的禽流感疫情中，中国走过了不平凡的50天。
B．中国恢复行使对的主权后，特区事务完全是中国内政，任何外国和国际组织均无权干预，这是国际社会公认的事实，也是国际法的准那么。
C．西班牙首相萨帕特罗中选后举行的第一次记者招待会上就明确表示，新政府将调整对HY和欧盟的外交政策，抛弃如今的“亲美疏欧〞政策，恢复并加强与法国和德国等欧洲国家的“亲密传统友好关系〞。
高三数学题限时练习题
高三数学题限时练习题第一题：已知函数f(f)=ff^2+ff+f，其中f，f，f为常数，且f≠0。
已知当f=2时，f(f)=3；当f=1时，f(f)=1。
请回答以下问题：1. 根据已知条件，列出函数f(f)的方程式。
2. 求函数f(f)的导函数f′(f)。
3. 若函数f(f)的极值点为f=−1，求函数f(f)在f=−1处的极值。
解答：1. 假设函数f(f)的方程式为f(f)=ff^2+ff+f。
由已知条件可以得到如下方程组：3 = 4f+2f+f (1)1 = f+f+f (2)解方程组 (1) 和 (2)，可以得到f=1，f=-1，f=3。
因此，函数f(f)的方程式为f(f)=f^2−f+3。
2. 函数f(f)的导函数f′(f)可以通过求函数f(f)的变化率来得到。
根据导数的定义，有：f′(f) = lim(f→0) (f(f+f)−f(f))/f对函数f(f)=f^2−f+3进行求导，得到：f′(f) = 2f−1所以，函数f(f)的导函数f′(f)为2f−1。
3. 函数f(f)的极值点为f=−1，可以通过求导数为0的点来求得。
令f′(f)=0，有：2f−1 = 0解方程得到f = 1/2。
即函数f(f)在f=−1处的极值为f=1/2。
第二题：已知函数f(f)=f^3+ff^2+ff+f，其中f，f，f为常数。
请回答以下问题：1. 当f=2时，f(f)=1；当f=1时，f′(f)=2。
根据已知条件，列出函数f(f)的方程式以及函数f(f)的导函数f′(f)的方程式。
2. 求函数f(f)的导函数f′(f)的导函数f′′(f)。
3. 若函数f(f)的极值点为f=−1，求函数f(f)在f=−1处的极值。
解答：1. 假设函数f(f)的方程式为f(f)=f^3+ff^2+ff+f。
根据已知条件可以得到如下方程组：1=8+4f+2f+f (1)2=3+2f+f (2)解方程组 (1) 和 (2)，可以得到f=-2，f=3，f=-4。
高三下学期英语限时练4
新沂三中2023届高三英语限时练（4）限时：40分钟一、阅读理解AAllowing women to give birth in hospital with their pet dog by their side could make them less anxious, one of the first women to use a “birth dog” has said.Charlotte Beard, 24, who suffers from non-epileptic seizures, was supported through her 50-hour labour by her aid pet Flump, who is trained to detect seizures before they happen.Flump was prepared for the birth by being played audio tracks of babies crying at home and being introduced to staff at the maternity ward (产房) in Poole hospital. Beard joked. “He was visiting the maternity hospital on a very regular basis, getting to know staff, getting to know the different rooms and the setups.”It is a legal requirement that assistance dogs are allowed into hospitals, but Beard said a lot of hospitals were not aware of this.“It would have caused high levels of anxiety if Flump was not there,” she said. “I would have certainly been more concerned about my safety.”“I am not suggesting that if I were to have a seizure, staff would not have been able to look after me. But no staff member can detect beforehand whether you are going to have a seizure or not. That is something that Flump can do that nobody else can, and it gives them such valuable time to make sure that I am safe and have the right support in place before it happens. Prevention is always much better than treatment.”Beard got Flump at 10 weeks and has trained him since then. “From a human standpoint I cannot help but think how lovely it is that Flump was there. He was one of the first to see Alfie,” Beard said. “Being present there from the birth and meeting Alfie within moments of him being born, whether it has increased the bond or not, it was such a lovely experience for everyone. Flump was absolutely besotted (痴恋) with Alfie from the moment he first saw him.”1. Why did Beard have an assistance pet present during birth?A. To cure her disease.B. To monitor the doctors.C. To ease her anxiety.D. To keep the door.2. What was the assistance dog trained to do before doing the job?A. Understand human voices.B. Get familiarized with the hospital.C. Play music for babies.D. Learn about medical devices.3. What does the underlined word “it” in paragraph 6 refer to?A. Detecting the disease.B. Medical treatment.C. Looking after the patient.D. A seizure.4. What does Beard think of future bond between the dog and her son?A. It will be close.B. It will be tense.C. It needs improving.D. It is hard to say.BEven tree-planting can increase health risks to local human populations if it focuses too narrowly on a small number of species, as is often the case in commercial forests. Outbreaks of infectious diseases are more likely in areas of monoculture plantations, according to a new study.The researchers of the study said this was because diseases are filtered (过滤) and blocked by a range of predators (食肉动物) and habitats in a healthy, biodiverse forest. When this is replaced by a palm oil plantation or soy fields, the specialist species die off, leaving generalists such as rats and mosquitoes to thrive (繁殖) and spread pathogens across human and non-human habitats. The net result is a loss of natural disease regulation.The researchers examined the correlation between trends for forest cover, plantations, population and disease around the globe using statistics from international institutions such as the World Health Organization and the Food and Agricultural Organization. Over the period of study from 1990 to 2016, this covered 3,884 outbreaks of 116 diseases that crossed the species barrier and 1,996 outbreaks of 69 vector-borne infectious diseases, mostly carried by mosquitoes, ticks or flies.The new study adds to a growing body of evidence that viruses are more likely to transfer to humans or animals if they live in or near human-disturbed ecosystems. This is shaped by trade patterns and consumer behaviour. A quarter of global forest loss is driven by the production of commodities such as beef, soy, palm oil and wood fibre.Morand, lead-author of the study, said his study showed that disease risks need to be added to risk-benefit analysis of new projects. “We should take the costs of public health into account when considering new plantations. The risks are first to local people, but thenworldwide because we have seen with Covid how quickly diseases can spread.”Morand is now working on a more detailed study that will use satellite analysis of forest cover to examine links with disease. With more information, he believes it may be possible to predict future outbreaks and to work with local communities to build ecologically diverse and economically productive landscapes that reduce the risks.5. Why are outbreaks of infectious diseases more likely in areas of monoculture plantations?A. The specialist species are wiped out by their predators.B. Biodiversity decline destroys natural disease regulation.C. Local human populations have no knowledge of health risks.D. Commercial forests provide food for disease-carrying insects.6. How did the researchers get their findings?A. By conducting data analysis.B. By referring to another study.C. By making field investigation.D. By consulting authoritative agencies.7. What does Morand intend to do by his words in paragraph 5?A. Criticize policy-makers.B. Offer a solution to Covid.C. Make a suggestion.D. Support evidence for her findings.8. What does the last paragraph talk about concerning Morand-led study?A. Its theoretical basis.B. Its appeal to the public.C. Expectations for future studies.D. Researchers with new perspectives.第二节(共5小题;每小题分,满分分)If you’re going travelling after university or as a career break, an extended period of time of unemployment can leave a gaping hole in your CV. ____1____ As long as you plan your trip carefully and think about what you can do, travelling can actually boost your CV and career.Recharge you batteriesIf you’ve just spent three or four years at university, or working without a break, then you’ll need to recharge your batteries. If you take time out to travel you’ll have the opportunity to think about what’s important in your life and refocus on your career. ____2____ Learn a new skillIf you’re going on a round-the-world trip then you could be travelling from anywhere between a month to a year, why don’t youlearn a new skill while you’re on the road? ___3____ All businesses and companies need candidates with a broad skill set, so look at learning another language or getting further qualifications to boost your CV.Make contactsWhen you’re backpacking and travelling, try to make contacts with people who might be useful for your career. With the rise of social media, making contacts is as simple as saying “just tweet me” or “I’ll add you on Facebook”. The contacts you make while travelling could be your avenue into a new career. ____4____Volunteer____5____ Not only will you make a difference to the community and society, but it’ll look great on your CV. With volunteering you’ll learn what it means to live and work in another country, and employers are actively encouraging it. In a survey, 63% of HR professionals said that those who have taken a constructive gap year of volunteering or working abroad had an application that stood out from the rest.A. But don’t worry.B. Consider the simplest way you can meet their needs.C. It’s important to network wherever you are in the world.D. More often than not, you’ll come home feeling refreshed and energetic.E. Think about what employers are looking for in your industry and cater to that.F One of the hardest things to overcome when applying for a job is work experience.G. Volunteering is one of the most popular activities for gap years and round-the-world trips.第三部分语言运用(共两节,满分30分)When I was pregnant with Paige, I read about the donor milk bank and was instantly____1____. I learned that nearly 4,000 babies are born ____2____ every year; because their organs and immune systems have had less time to mature, they’re at greater risk of____3____, which can be fatal (致命的) in their____4____ early days. Breast milk is often the only thing they can ____5____, but mothers with a ____6____ pregnancy often find that their milk has not yet come in. The thought of helping the tiny babies ____7____ a lot to me.Paige was born a month early and in special care for a couple of days. That’s ____8____ we saw those tiny babies who could____9____ in your hand, only managing to take about 4 ml of milk at atime — and the reality of milk ______10______ hit home. Watching those other parents desperately hoping for their babies to______11______, and realizing I could help, was when the feeling that I should become a milk donor changed to wanting to ______12______ it.I contacted the coordinator of the donor milk bank. She came to my house to do my blood tests and ______13______ me through the process, so I was good to go. I now spend about six hours a day expressing milk. The milk is frozen and then _____14______ every week by one of the volunteer drivers. I’ve been told I’m donating record-breaking amounts, and I’ll______15______ donating for as long as I can.1. A. hesitant B. embarrassed C. interestedD. grateful2. A. prematurely B. safely C. purposelyD. secretly3. A. depression B. infection C. injuryD. conflict4. A. remaining B. boring C. criticalD. merry5. A. tolerate B. expect C. affordD. order6. A. lengthened B. shortened C. worsenedD. strengthened7. A. troubled B. amused C. offendedD. meant8. A. how B. when C. whetherD. what9. A. fit B. feed C. drinkD. grow10. A. delivery B. donation C. productionD. consumption11. A. recover B. survive C. laughD. communicate12. A. do B. forget C. useD. escape13. A. warned B. talked C. blamedD. teased14. A. thrown out B. sold out C. picked upD. drunk up15. A. give up B. carry on C. put offD. bring down第二节(共10小题;每小题分,满分15分)Shangsi Festival is an ancient Chinese festival ____1____ (celebrate) on the third day of the third lunar month. It is afestival____2____ (main) observed by Chinese ethnic groups to drive away evil spirits and natural disasters.There are many ____3____ (story) about the festival’s true origins. Some say it stems from a dinner party held on the banks of the Qushui River during the Zhou Dynasty. Others say it____4____ (come) from the custom of getting rid of evil by bathing in the river.Shangsi Festival activities have changed with the times. The feast and praying for later generations by the river____5____ (add) in the Han Dynasty. It was after the Wei and Jin dynasties ___6____ the event developed into the Double Third Day.After the Ming and Qing dynasties, the festival developed into____7____ spring outing featuring lively activities like hiking and listening to choir music.To the Zhuang ethnic group, March 3 is a festival for young people ____8____ (sing) songs and find their true love. Since 1983, singing festivals____9____ (hold) annually on this day throughout Guangxi.Five-colored sticky rice and painted eggs are traditional food for the Shangsi Festival. The Zhuang people believe rice is good for health and painted eggs are seen ____10____ a symbol of love.参考答案：【答案】CBD31~35ABACC36~40ADECG41~45CABCA46~50BDBAB51~55BABCBaddedbeen【解析】C本篇是一篇报道,介绍了英国一位妇女让宠物狗陪她在医院产子的事情。
安徽省利辛县第一中学2023-2024学年高三上学期第23次限时练数学试题
安徽省利辛县第一中学2023-2024学年高三上学期第23次限时练数学试题学校:___________姓名：___________班级：___________考号：___________一、单选题1．已知集合{}2,1,1,2A =--，集合{|B k A y kx =∈=在R 上为增函数}，则A B ⋂的子集个数为（ ） A ．1B ．2C ．3D ．42．如图是一个机器人手臂的示意图.该手臂分为三段，分别可用向量,,a b c r r r 代表.若用向量d u r代表整条手臂，则（ ）A ．a b c d ++=r r r u rB ．a b c d +=+r r r u rC ．a c d b +=-r r u r rD ．a b c d +=-r r r u r3．设函数()()2x x a f x -=在区间()0,1上单调递减，则a 的取值范围是（ ）A ．(],2-∞-B ．[)2,0-C ．(]0,2D ．[)2,+∞4．已知椭圆2222:1(0)x y C a b a b +=>>，直线0ax by -=与圆221:04M x y mx +-+=相切，则实数m 的值是（ ）A ．1±B ．2±C ．4±D ．8±5．已知等比数列{}n a 的前n 项和为n S ，公比为q ，则下列选项正确的有（ ） A ．若1q >，则1n n a a +>B ．()2121nn n a a a a a =LC ．数列{}1n n a a +-是等比数列D ．对任意正整数n ，()()2232n n n n n S S S S S --=6．已知函数()f x 满足：x ∀，y ∈Z ，()()()21f x y f x f y xy +=+++成立，且(2)1f -=，则()()*2f n n ∈=N （ ）A ．46n +B ．81n -C ．2421n n +-D ．2825n n +-7．在高山滑雪运动的曲道赛项目中，运动员从高处（起点）向下滑，在滑行中运动员要穿过多个高约0.75米，宽4至6米的旗门，规定：运动员不经过任何一个旗门，都会被判一次“失格”，滑行时间会被增加，而所用时间越少，则排名越高.已知在参加比赛的运动员中，有五位运动员在滑行过程中都有三次“失格”，其中 （1）甲在滑行过程中依次没有经过A ，B ，C 三个旗门； （2）乙在滑行过程中依次没有经过D ，E ，F 三个旗门； （3）丙在滑行过程中依次没有经过G ，A ，C 三个旗门； （4）丁在滑行过程中依次没有经过B ，D ，H 三个旗门； （5）戊在滑行过程中依次没有经过B ，C ，E 三个旗门.根据以上信息，A ，B ，C ，D ，E ，F ，G ，H 这8个旗门从上至下的排列顺序共有（ ）种可能. A ．6B ．7C ．8D ．128．已知正数,a b 满足2e 12ln 182a b a b +≤++，则e a b +=（ ）A ．94B ．32C ．1D ．34二、多选题9．空气质量指数大小分为五级.指数越大说明污染的情况越严重，对人体危害越大，指数范围[)0,50，[)50,100，[)100,200，[)200,300，[]300,500分别对应“优”“良”“轻度污染”“中度污染”“重污染”五个等级.如图是某市连续14天的空气质量指数趋势图，下面说法正确的是（ ）A ．这14天中有5天空气质量指数为“轻度污染”B ．从2日到5日空气质量越来越好C ．这14天中空气质量的中位数是196.5D ．连续三天中空气质量指数方差最小是5日到7日10．如图，已知二面角l αβ--的棱l 上有A ，B 两点，C α∈，AC l ⊥，D β∈，BD l ⊥，且1AC AB BD ===，则下列说法正确的是（ ）A ．1CD AB ⋅=u u u r u u u rB ．当二面角l αβ--的大小为60︒时，CD 与平面β所成的角为30︒C ．若CD =ABCD 的体积为112D ．若CD C BD A -- 11．设一组样本的统计数据为：12,,,n x x x L ，其中n ∈N *，12,,,n x x x R ∈L ．已知该样本的统计数据的平均数为x ，方差为2s ，设函数()21()ni i f x x x ==-∑，x ∈R ．则下列说法正确的是（ ）A ．设b ∈R ，则12,,,n x b x b x b +++L 的平均数为x b +B ．设a ∈R ，则12,,,n ax ax ax L 的方差为2asC ．当x ＝x 时，函数()f x 有最小值2nsD ．2212()()()n f x f x f x n s +++<L12．已知函数()2ln x f x x =，()()1e R 2xg x a a x =-∈，则下列说法正确的是（ ）．A ．函数()f x 的极大值为12eB ．当1a =时，用二分法求函数()g x 在区间()0,1内零点的近似值，要求误差不超过0.01时，所需二分区间的次数最少为6C ．若函数()g x 在区间(),0∞-上单调递增，则a 的取值范围为2e ,8⎡⎫-+∞⎪⎢⎣⎭D ．若不等式()()f x g x ≤在区间()0,∞+上恒成立，则a 的取值范围为1,2e ⎡⎫+∞⎪⎢⎣⎭三、填空题13．课外活动小组共9人，其中男生5人，女生4人，现从中选5人主持某种活动，则至少有2名男生和1名女生参加的选法有种.14．在ABC V 中，内角,,A B C 所对的边分别为,,a b c ，若16cos 1611,3,2b C a c b c =-==，则sin C =，=a .15．费马定理是几何光学中的一条重要原理，在数学中可以推导出圆锥曲线的一些光学性质．例如，点P 为双曲线（1F ，2F 为焦点）上一点，点P 处的切线平分12F PF ∠．已知双曲线C ：22142x y -=，O 为坐标原点，l 是点P ⎛ ⎝⎭处的切线，过左焦点1F 作l 的垂线，垂足为M ，则OM =．16．如图，用一个平面去截圆锥，得到的截口曲线是椭圆.在圆锥内放两个大小不同的球，使得它们分别与圆锥的侧面相切.椭圆截面与两球相切于椭圆的两个焦点1F ，2F .过椭圆上一点P 作圆锥的母线，分别与两个球相切于点,M N .由球和圆的几何性质可知，1PN PF =，2PM PF =.已知两球半径分为别1和3，则两球的球心距离为.。
高三限时练习题
高三限时练习题高三是学生们备战高考的最后冲刺阶段，为了帮助同学们提高学习效率和应对考试的能力，我们准备了一套高三限时练习题。
本练习题共分为五个部分，包括语文、数学、英语、物理和化学。
一、语文阅读下面的短文，根据短文内容回答问题。
（略去短文）二、数学1. 已知函数 f(x) = 2x + 3，求 f(5) 的值。
2. 在平面直角坐标系中，已知点 A(2, 3)，B(5, 7)，求 AB 的长度。
3. 已知等差数列的首项为 3，公差为 4，求第 10 项的值。
4. 某种商品的原价为 200 元，现在打 8 折出售，求出售价格。
5. 解方程 2x - 5 = x + 6。
三、英语阅读下面的短文，根据短文内容回答问题。
（略去短文）四、物理1. 一个质量为 2kg 的物体，以 5 m/s 的速度向右运动，受到一个向左的 10N 的力，求物体的加速度。
2. 一辆汽车以 60 km/h 的速度匀速行驶 4 小时，求汽车行驶的路程。
3. 光的速度为 3 × 10^8 m/s，如果光从太阳到地球需要 8 分钟，求地球和太阳的距离。
4. 一个质量为 0.2 kg 的物体从 10 m 的高度自由落下，忽略空气阻力，求物体落地时的动能。
5. 若把一个气缸放在加热器中，并且缸内的气体被加热，则气缸内气体的温度会如何变化？五、化学1. 写出 H2SO4 的化学式。
2. 已知一种化合物的化学式为C6H12O6，求该化合物的摩尔质量。
3. 某种物质的分子量为 18 g/mol，若样品中含有 2 mol 的该物质，求样品的质量。
4. 以下哪个物质是无机物？(A) 葡萄糖 (B) 水 (C) 甲烷 (D) 粉末铁5. 已知反应方程式：4HCl + O2 → 2H2O + 2Cl2。
在该反应中，氯的化合态数是多少？以上就是我们为你准备的高三限时练习题，希望能帮助你提升学习能力并顺利备战高考。
祝你取得优异的成绩！。
2023高三晚自习英语限时 基础练习卷(含答案)
2023高三晚自习限时（基础练习卷）一、基础巩固与翻译练习1. 在那一刻她似乎在嘲笑我，但随后我又从她的微笑中感受到悲伤。
(汉译英）2. 毕业在即，我既高兴又自豪，也认识到唯有不断学习、努力奋斗才会未来可期。
（approach）(汉译英)3. 纵观人类历史，如果一个民族无法适应时代变迁，它就很难在激烈的全球竞争中存活。
(survive) (汉译英)4. 春节期间的所见所闻让我们深刻地感受到：千千万万普通人最伟大，幸福都是奋斗出来的。
(happiness)5. 直到经历了令人精疲力竭的15天的征程，全体船员才意识到这个征程未结束。
(It was not until..) (汉译英）6. 通过志愿者服务与奉献，年轻人们在成长中能有所作为，也得到了机会去珍视生活中真正重要的东西。
(difference) （汉译英）二、3篇阅读理解题A7. According to the text, which animal can help you relax?A．A snake. B．A dog.C．A honeyguide bird. D．A miniature horse.8. Miniature horses could serve .A．blind people who dislike dogs B．blind people who can live longer C．animal lovers who search for honey D．animal lovers who suffer from cancer 9. The text is about animals’ .A．special training B．great potentialsC．unique jobs D．high intelligenceBAfter being attacked by Hurricane Ida’s 150 mph winds and torrential rains, hundreds of thousands of Gulf Coast residents were left without power and fresh water this week as a 100-degree heat wave settled over the region. Ida smashed into Louisiana as a Category 4 hurricane, ripping off roofs, knocking out transmission lines, flooding roads, and reducing some brick buildings in downtown New Orleans to rubble. At least eight people died in the storm and the toll is expected to rise as emergency workers search wrecked homes and businesses.One of the most powerful hurricanes to ever hit the U.S. mainland, Ida brought a 5 to 12-foot storm surge that covered low-lying communities in southeastern Louisiana. Grand Isle is now “uninhabitable,” said Parish President Cynthia Lee Sheng, with 3 feet of sand covering the entire barrier island and 40 percent of the buildings completely destroyed.The storm caused a citywide blackout in New Orleans, but a Hurricane Katrina-level disaster was avoided there, thanks in part to the $ 14.5 billion spent on new levees, seawalls, and pumps after the 2005 storm. Experts are warning that Ida could worsen the Covid crisis in the Gulf Coast, as residents crowd together in homes and emergency shelters without immediate access to testing or medical care. ICUs in Louisiana, Mississippi, and Alabama hospitals were already near capacity be- fore the storm hit. Nearly 1 million people are still without power across Louisiana, and authorities waned it could be weeks before electricity is restored. “If you have already evacuated,” said Gov. John Bel Edwands, “do not return here.”；10. Which of the following best describes Hurricane Ida?A．Mild. B．Destructive. C．Uncontrollable. D．Impressive.；11. What does the underlined words “the toll” mean in Paragraph 1?A．The death number. B．The heat wave.C．The wind speed. D．The citywide blackout.；12. What is one of the reasons for Grand Isle to be uninhabitable?A．The entire island is covered with sand. B．It is one of the low-lying communities.C．The residents there can't wait to leave. D．Over half of its buildings were in ruins.；13. What can be inferred about the attitude of Gov. John Bel Edwards towards the prospect of Louisiana?A．Ambitious B．Undoubted. C．Indifferent. D．Unconfident.CPangolins (穿山甲) are the most trafficked (非法交易) mammals in the world and are facing extinction. To draw attention to these scaly (有鳞片的), anteater-like animals, a new wildlife documentary, Eye of the Pangolin, is attempting a u nique way to inspire action and conservation. Partnering with the non-profit organization Pangolin. Africa, the documentary was made available on YouTube in May 2019. The intention is to reach communities wherever the Internet is available, especiallyAfri can communities, who live near the animal’s habitats.Over two years, the documentary crew traveled to South Africa, Ghana, Central African Republic and Gabon in search of the four unique species of pangolin, which has never been achieved before. Filmmakers Bruce Young and Johan Vermeulen say that they went into the shoot knowing relatively little about pangolins, but grew to respect and appreciate the animals. Getting close to the creatures over two years was a crash course in these secretive creatures. Johan Vermeulen said, "One thing however that might seem unimportant is that they are actually quite fussy eaters. You would think they would eat any type of ant, but they all prefer a specific type ant."Pangolins are hunted illegally across Africa for their scales, which are used for traditional medicine, and their meat. In April 2019, Singaporean customs officials conducted two separate seizures of 24 tons of pangolin scales, which equals to the death of 69,000 pangolins.Though the documentary focuses less on the trafficking of pangolins, and more on the animals in their natural habitat, the aim of the documentary is to inspire viewers around the world to call for action to end trafficking and protecting these unique creatures.Filmed on location in South Africa, Ghana, Central African Republic, and Gabon, this powerful documentary is the story of two men on a mission to get all four species of African pangolin on camera for the very first time.14. What is the purpose of the documentary?A．To study the situation of pangolins.B．To collect fund to protect pangolins.C．To raise awareness of pangolin protection.D．To propose setting up pangolin reserves.15. What is the meaning of the underlined word “fussy” in paragraph 2?A．Picky. B．Messy.C．Showy. D．Heavy.16. What’s the documentary mainly about?A．The illegal trade of pangolins.B．The medical function of pangolin's scales.C．The life of pangolins in their natural habitats.D．The efforts of Pangolin, Africa to save pangolins.17. Where is the text most likely from?A．A brochure. B．A diary.C．A novel. D．A magazine.三、七选五阅读Ways to Boost Your Emotional Health by Improving Your Confidence Taking care of your emotional health is as important as taking care of your physical body. 18 When you feel good about yourself, it's much easier to cope with life's little ups and downs as well as bigger events. Here are ways you can practice better stress management and boost your self-esteem.▲ 19Alcohol can be a good stress reducer, but you must be careful. The same advice applies to food intake. You can eat what you want and enjoy it as long as you eat smaller portions and get regular exercise. Maintaining a proper weight is important for your physical and your emotional health.▲Lear n More to Lessen the Fear of the Unknown20 If you have a problem, learn whatever you can about the issue or the health condition you're facing. The more you know, the less you will fear what might happen.▲Get Moving to Improve Mood and Lessen Anx ietyAny form of exercise that you enjoy will do. Regular exercise works as a good partner for people who are on medication. Exercise also works well for people who have mild or moderate depression and don't need to be on medication. 21 .▲Develop a Passion by Investing Time in a New HobbyEveryone should have at least one hobby, whether it's taking care of plants, collecting antiques, or listening to music. 22 Having a hobby and taking pride in it is a great way to boost self-esteem.A．If you are unsure of how to get started, take a class and learn how to practice on your own for 30 minutes, three times a week.B．Knowledge is power.C．Think of it as a great tool for stress management.D．Manage Your Time by Setting Weekly Goals.E．If your emotional health is out of balance, you may experience high blood pressure.F．You should do something that brings you some real joy that no one can take from you.G．Eat and Drink Healthfully and Appropriately.四、语法填空阅读下面短文, 在空白处填入1个适当的单词或括号内单词的正确形式。
河南省驻马店市上蔡县衡水实验中学2023届高三上学期限时练物理试题10
匀变速直线运动（第六课时）班级：_________ 姓名：__________小组：_________（快速、准确、高效，一分耕耘一分收获）一、单项选择题（每题4分）1．一辆摩托车在平直的公路上匀加速行驶，经过路旁两相邻电线杆时的速度分别是5m/s 和15m/s ，已知相邻两电线杆之间的距离是20m 。
则摩托车的加速度是（ ）A ．5 m/s 2B ．0.5m/s 2C ．10 m/s 2D ．2.5 m/s 22．下列有关匀变速直线运动的表达式（初速度0v ，末速度v ，加速度a ，时间t ，位移x ），正确的是（ ） A ．2012x v t at =+B ．2012x v at =+C ．0v v at =+D ．220v v ax -=3．有几位同学为了测试某款汽车的性能，记录了该汽车沿平直公路启动、匀速行驶和制动三个过程速度的时间(s) 0 2.0 4.0 6.0 8.0 10.0 12.0 14.0 16.0 速度（m/s ）10.020.028.028.028.028.028.0A ．汽车加速到6s 末才开始匀速运动B ．加速阶段位移为90mC ．前8s 内汽车通过的位移大小为145.6mD ．制动过程加速度大小一定为10m/s 24．高速公路上有两辆汽车一前一后以相同的速度行驶着，两车相距70m ，突然前车发现紧急情况， 立即刹车，后车发现前车开始刹车时，也立刻采取相应措施，假设刹车时两车的加速度大小相同，已知人的反应时间和汽车系统的反应时间之和大约在1.4~2. 1s 之间，为确保两车不追尾，则两车刹车前行驶的最大速度为A ．90 km/hB ．110 km/hC ．120 km/hD ．130 km/h 5．如图所示为某质点做直线运动的v -t 图像，下列说法正确的是（ ） A ．0~4s 内质点先静止后做匀速直线运动 B ．质点在2s 末运动方向发生改变C ．2~4s 内质点加速度大小不变，方向与运动方向相同D ．0~4s 内质点通过的位移为6m6．如图所示，一质点做匀加速直线运动先后经过A 、B 、C 三点，已知从A 到B 和从B 到C 速度的增加量△v 均为2m/s ，AB 间的距离x 1=3m ，BC 间的距离x 2=5m ，则物体的加速度为（ ）A ．1m/s 2B ．2m/s 2C ．3m/s 2D ．4m/s 27．光滑水平面上有一物体，它的初速度为v 0=1m/s ，以初速度的方向为正方向，物体的加速度随时间t 变化的关系如图所示，则此物体（ ） A ．在0~2s 内做匀加速直线运动 B ．在2s 末的速度为2m/sC ．在2~4s 内的位移为10mD ．在4s 末时速度最大8．朝某一方向做匀变速直线运动的物体，在3s t =内速度从06m /sv =，增加到9m /s v =，则下列说法正确的是（ ）A ．这个物体的加速度为23m /sB ．这个物体在3s 内的平均速度5m /sC ．这个物体在接下来的3s 内的位移为31.5mD ．这个物体在连续的两个3s 内的位移差为81m 9．a 、b 两物体从同一地点同时出发，沿相同方向运动。
高三限时训练
高三限时训练语文试题第Ⅰ卷一、（72分，每小题3分）1、下列各组词语中加点字的读音，有错误的一项是（）A．菲．薄（fěi）嬗．变（shàn）鞭鞘．（shāo）闭目塞．听（sâ）B．僭．越（jiàn）黏．土（nián）叨．咕（dáo）缀．玉连珠（zhuì）C．炭疽．（jū）逶．迤（wēi）禁．受（jīn）积重．难返（zhîng）D．骄横．（hãng）粜．米（tiào）遴．选（lín）怏．怏不乐（yàng）2、下列词语中加点的字，每对读音都不相同的一组是（）A．豆豉/奢侈单薄/刻薄赝品/义愤填膺B．即使/觊觎倾轧/轧钢狙击/含英咀华C．慨叹/楷模狼藉/蕴藉炮烙/一丘之貉D．渣滓/恣意倒退/倒影辍学/掇拾旧闻3、下列各组词语中，没有错别字的一组是（）A.消赃弊绝风清林荫路两全齐美B.清净察颜观色摄相机大才小用C.抱负兵荒马乱录像带闲情逸志D.贸然以儆效尤绿茵场甘之如饴4、下列各组词语中，没有错别字的一组是（）A.草菅人命刚愎自用病入膏肓擅长写作B.再接再励怙恶不俊万马齐喑千丝万缕C.相形见绌如火如茶毫厘不爽莫明其妙D.雷霆万钧烦燥不安开诚布公江澄如练5、下列各句中加点的成语使用正确的一项是（）A.杂技演员们在空中飘来荡去，潇洒自如，一个个惊险刺激的动作让人感到触目惊心．．．．！B.美国政府在台湾问题上的危言危行．．．．，只能是搬起石头砸自己的脚。
C.在个人利益和集体利益发生矛盾时，应该坚决地舍弃个人利益，决不畏首畏尾．．．．。
D.许多旅行家在描写极光时往往语焉不详．．．．，只说些“无法以言语形容”这类的遁辞。
6、下列各句中加点的成语使用正确的一项是A.对科学事业他总是诛求无已．．．．，对个人的得失他从不计较。
B.这儿风景优美，河清海晏．．．．，吸引了不少中外游客。
C.这个东西已是不名一钱．．．．，他却把它当作稀世珍宝。
高三电场限时练习
4、如图所示，三条平行等距的虚线表示电场中的三个等势面，电势值分别为 10V、20V、30V，实线 是一带负电的粒子（不计重力）在该区域内的运动轨迹，对于轨迹上的 a、b、c 三点来说 ( ) A、粒子在三点的合力 Fa=Fb=Fc； B、粒子必先过 a，再到 b，然后到 c； C、粒子在三点的动能大小为 EKb>EKa>EKc； D、粒子在三点的电势能大小为 EPc<EPa<EPb 5．如图所示，Q1、Q2 为两个被固定的正负点电荷，在它们的连线的延长线上有 a、b、c 三点，a 是 bc 的中点，其中 a 点的电场强度恰好为零。现有一正电荷 q 以一定的初速度从 b 点运动到 c 点，则 （ ）
C．小球在从 a 点运动到 b 点的过程中，电势能减小 D．小球在运动过程中机械能守恒 13.如图所示， a、 b 两个带电小球的质量均为 m， 所带电量分别为+2g 和-q， 两球间用绝缘细线连接， a 球又用长度相同的绝缘细线悬挂在天花板上，在两球所在的空间有方向向左的匀强电场，电场强 度为 E，平衡时细线都被拉紧．则平衡时可能位置是图中的 ( )
A.EA 一定大于 EB，φ A 一定大于φ
B B B B
ห้องสมุดไป่ตู้
B.EA 不一定大于 EB，φ A 一定大于φ C.EA 一定大于 EB，φ A 不一定大于φ
D.EA 不一定大于 EB，φ A 不一定大于φ
10.如图，长为 L，倾角为 θ 的光滑绝缘斜面处于电场中，一带电量为+q，质量为 m 的小球，以初速 度 v0 由斜面底端的 A 点开始沿斜面上滑，到达斜面顶端时的速度仍为 v0，则：( A．A 点电势比 C 点电势低 B．小球在 C 点的电势能大于在 A 点的电势能 C v0 )
2023届高三英语晚自习限时小练含答案
高三英语晚自习限时训练【阅读理解+七选五+语法填空+应用文写作+读后续写】一、阅读理解AChester is one of the best cities in the UK. As soon as you arrive in Chester you will appreciate the city’s unique atmosphere and sense of history. Founded by the Romans over 2,000 years ago, much of the Roman influence remains and Chester’s city walls ar e the most complete in Britain. Combined with history and heritage(遗产), Chester is a dynamic city full of bars, pubs, clubs, hotels and restaurants for you to discover, tempting you to visit again and again.Travelling to Chester?Chester is easily accessible by many means of transport — whether you are travelling by rail, car, bus or plane. Please check our route planner below to help you plan your journey to Chester. Onceyou arrive in the city there are numerous car parks; however, during rush hours the easiest way to travel in Chester city centre is via park and ride facilities, which are parking lots with public transportation.Hotels?From bed & breakfasts to the luxury of Chester’s only five star hotel, Chester has all covered. Whether your trip is for business or pleasure your room is just a click away!Sightseeing and Tours?One of the best ways to see Chester is by a guided tour and you have a variety to choose from. Whether you choose the traditional guided walk, to be guid ed around Chester’s historical landmarksby bus or to take a boat down the River Dee, you will sure enjoy the delights of Chester.1. What can we know about Chester from the first paragraph?A．It is a newly built city.B．It is the best city in the UK.C．It is rich in the deep culture and modern touch.D．Many of its city walls were completed by British people.2. What is the most convenient way to get around Chester city centre during rush hours?A．By bus. B．By bicycle.C．By rail. D．By taxi.3. What had you better do to have a better understanding of Chester?A．Choose a bus tour. B．Join a guided tour.C．Take a traditional walk. D．Swim down the river.BWalk into any waiting area and you will see people of all ages on the phone. It is rare to see people sitting and simply thinking while waiting for the next part of the day or night. We have also observed people playing with their mobile phones while having dinner with others or in the presenceof their families. It seems that everyone is experiencing FOMO (fear of missing out) or a strong addiction to electronic devices.Why do adults, middle school students, and even young children turn to electronics while waiting?A recent study by Hatano et al. (2022) found that in different cultures people underestimate how enjoyable and attractive simply thinking might be. In a series of studies on university students in both Japan and the United Kingdom, the participants rated their level of expected enjoyment and engagement in simply thinking and then rated their actual level of enjoyment and participation in thinking after the waiting period. During the waiting period, the participants only had the option to think. They were not allowed to take electronics into the waiting area. The participants were not necessarily happy about thinking. Instead, they underestimated the benefits related to thinking and thought that thinking was aversive before the waiting period, which only allowed thinking without electronic products. After this waiting period, they admitted that thinking was more interesting and easier than expected.Thinking can include problem-solving, goal-setting, and a variety of other creative tasks. These outcomes can be extremely productive and satisfying. Perhaps it is time for parents and educators to teach chil dren about the importance of paying attention to one’s thoughts. We need to be better role models and put down our own phones when there is an opportunity to simply wait and think. We need to provide these opportunities for both ourselves and our children.；4. What’s the purpose of the author describing the scene about people’s using electronics?A．To introduce the importance of electronics.B．To tell what bad influences electronics have.C．To voice his views on thinking while waiting.D．To explain why we should have better ways of communication.；5. What does the underlined word “aversive” in paragraph 2 mean?A．Satisfactory. B．Boring. C．Worried. D．Meaningful.；6. What should parents and educators do according to the text?A．Provide opportunities for children.B．Pick up the phones while waiting.C．Underestimate the benefits of thinking.D．Tell children about the significance of thinking.；7. Which can be a suitable title for the text?A．Why should we put our phones down?B．How can electronic products affect us?C．How do we think freely by using phones?D．Why does thinking while waiting make people smart?CIn the past 30 years, the non-profit organization Friends of Trees planted trees along the streets of Portland, Oregon. Now, a new study shows that each tree planted was connected with significant reductions in non-accidental and cardiovascular (心血管的) mortality (死亡率).Evidence pointing to a connection between exposure to nature and lower mortality is obvious. Between 1990 and 2019, Friends of Trees planted 49,246 street trees. The research team looked at the number of trees planted in a given area in the past 5, 10 or 15 years. They connected this information with mortality due to cardiovascular, respiratory (呼吸的) or non-accidental causes in that same area, using data from the Oregon Health Authority. The results showed that in neighborhoods in which more trees had been planted, mortality rates were lower. This connection was significant for cardiovascular and non-accidental mortality, particularly for males and people over the age of 65.Furthermore, the connection got stronger as trees aged and grew: The reduction in mortality rate connected with trees planted 11 to 15 years before was double that observed with trees planted in the past 1 to 5 years. This means that older trees are connected with larger decreases in mortality, and that protecting existing grown trees may be particularly important for public health. This study doesn’t provide a direct opinion into how trees improv e health. However, the result that larger trees have a greater health effect than smaller ones is telling, because larger trees are better at absorbing air pollution, moderating temperatures, and reducing noise.“We observed the effect both in green and l ess green neighborhoods, which suggests that street tree planting benefits both,” said Geoffrey H. Donovan, first author of the study. “Be-sides, the benefits of tree planting greatly outweigh (大于) the cost. Our results provide an important evidence-base f or clear measures (e. g. planting trees) to increase the lifetime of urban people.”；8. How long did it take Friends of Trees to plant 49,246 street trees?A．5 years. B．10 years. C．15 years. D．30 years.；9. What do we know about the study from paragraph 3?A．Women gain no benefit from trees.B．Tree planting can cure respiratory diseases.C．Older trees contribute more to public health.D．Newly planted trees can better improve public health.；10. What does Donovan suggest doing?A．Protecting trees in forests. B．Planting more street trees.C．Joining Friends of Trees. D．Getting more benefits from nature.；11. How does the author mainly develop the topic of the text?A．By listing numbers. B．By stating results.C．By describing processes. D．By raising questions.二、七选五阅读Is it time to ditch sugar?It’s no secret that sugar can cause issues if you’re indulging (放任) in a little too much of the sweet stuff. Still, most Americans are eating too much sugar. The harmful effects it can have on your physical health are well studied. 12 .Sugar can affect your moodYou probably turn to a doughnut (甜甜圈) or soda for an extra boost during a long day. Yet sugar may not be such a positive pick-me-up after all. Recent research indicates that sugary treats have no positive effect on mood. 13 .One study published in 2017 found that consuming a diet high in sugar can increase the chances of mood disorders. A more recent 2019 study found that regular consumption of saturated fats (饱和脂肪) and added sugars were related to higher feelings of anxiety in adults over age 60.14It’s hard to avoid reaching for comfort foods, especially after a difficult day. But the cycle of consuming sugar to manage your emotions may only make your feelings of sadness, tiredness, or hopelessness worse. Multiple studies have found a link between diets high in sugar and depression.15 . These can lead to depression and may even increase the long-term risk of developing a mental health disorder in some people.Sugar destroys your brain powerEmerging research has found that diets high in sugar can damage cognitive functioning, even in the absence of extreme weight gain or too much energy intake. A 2015 study found that consuming high levels of sugar-sweetened drinks made neurocognitive functions like decision making and memory worse. 16 . But a more recent study found that healthy volunteers in their 20s scored worse on memory tests and had poorer appetite control after just 7 days of eating a diet high in saturated fat and added sugars.Although more studies are needed to solidify the effects on mental health of sugar consumption, it’s important to consider how diet can affect your well-being.A．Sugar can weaken your ability to deal with stressB．Granted, the research was done on ratsC．Overconsumption of sugar triggers imbalances in certain brain chemicalsD．Sugar can increase your risk for developing depressionE．In fact, sugar may have the opposite effect over timeF．However, the effect on mental health is worth taking a second lookG．If you’re dying for sweets, here’s what to eat instead三、语法填空阅读下面材料，在空白处填入适当的内容(1个单词)或括号内单词的正确形式。
高三化学40分钟限时练-化学反应速率
高三化学反应速率测试副标题一、单选题（本大题共9小题，共63.0分）1.反应C（s）+H2O（g）⇌CO（g）+H2（g）在一可变容积的密闭容器中进行，下列条件的改变对其反应速率几乎无影响的是（）①增加C的量②将容器的体积缩小一半③保持体积不变，充入N2使体系压强增大④保持压强不变，充入N2使容器体积变大。
A. ①④B. ②③C. ①③D. ②④2.在2A+B⇌3C+4D反应中，表示该反应速率最快的是（）A. B.C. D.3.在温度不变的条件下，在恒容的容器中进行下列反应：N2O4（g）=2NO2（g），若N2O4的浓度由0.1mol•L-1降到0.07mol•L-1需要15s，那么N2O4的浓度由0.07mol•L-1降到0.05mol•L-1所需的反应时间（）A. 等于5sB. 等于10sC. 小于10sD. 大于10s4.已知4NH3+5O2=4NO+6H2O，反应速率分别用υ（NH3）、υ（O2）、υ（NO），υ（H2O）表示，下列关系正确的是（）A. B.C. D.5.将4molA气体和2mol B气体在2L的容器中混合，并在一定条件下发生如下反应：2A（g）+B（g）=2C（g），若经2s后测得C的物质的量为0.6mol．下列叙述正确的是（）A. 用物质C表示的反应的平均速率为B. 反应开始到2 s，物质B的物质的量浓度减少了C. 2 s时物质A的转化率为D.6.向绝热恒容密闭容器中通入SO2和NO2，一定条件下使反应SO2（g）+NO2（g）⇌SO3（g）+NO（g）达到平衡，正反应速率随时间变化的示意图如图所示．由图可得出的正确结论是（）A. 反应在c点达到平衡状态B. 反应物浓度：a点小于b点C. 反应物的总能量低于生成物的总能量D. 时，的转化率：～段小于～段7.下列关于化学反应速率的说法正确的是（）①恒温时，增大压强，化学反应速率一定加快②其他条件不变，温度越高，化学反应速率越快③使用催化剂可改变反应速率，从而改变该反应过程中吸收或放出的热量④3mol•L-1•s-1的反应速率一定比1mol•L-1•s-1的反应速率大⑤升高温度能使化学反应速率增大，主要原因是增大了反应物分子中活化分子的百分数⑥有气体参加的化学反应，若增大压强（即缩小反应容器的体积），可增加活化分子的百分数，从而使反应速率增大⑦增大反应物浓度，可增大活化分子的百分数，从而使单位时间有效碰撞次数增多⑧催化剂不参与反应，但能降低活化能增大活化分子的百分数，从而增大反应速率．A. ②⑤B. ②⑥⑧C. ②③⑤⑦⑧D. ①②④⑤⑧8.在l℃时，10mL0.4mol•L-1H2O2溶液发生催化分解：2H2O2催化剂 2H2O+O2↑，不同时刻测得生成O的体积（已折算为标准状况）如下表：A. 的平均反应速率比快B. 的平均反应速率 xC. 反应至 6min 时，D. 反应至6min时，分解了9.一定量的盐酸跟过量的铁粉反应时，为了减缓反应速率但不影响生成H2的总量，可向盐酸中加入适量的（）A. B. 溶液 C. 溶液 D.二、实验题（本大题共2小题，共37.0分）10.Ⅰ．短周期元素X、Y、Z、W在元素周期表中相对位置如图所示，其中Y所处的周期序数与族序数相等．按要求回答下列问题：（1）写出X的原子结构示意图______ ．（2）Y、Z、W的简单离子半径由大到小顺序为______ （用离子符号表示）．（3）含Y的某种盐常用作净水剂，其净水原理是______ （用离子方程式表示）．Ⅱ．运用所学化学原理，解决下列问题：（4）已知：①C（s）+O2（g）=CO2（g）；H=a kJ•mol-1；②CO2（g）+C（s）=2CO（g）；H=b kJ•mol-1；③Si（s）+O2（g）=SiO2（s）；H=c kJ•mol-1．______ ．（5）已知：CO（g）+H2O（g）⇌H2（g）+CO2（g）．表为该反应在不同温度时的平衡常数．该反应的H ______ 0（填“＞”、“＜”）；500℃时进行该反应，且CO 和H2O起始浓度相等，CO平衡转化率为______ ．（6）以熔融K2CO3为电解质的一种新型氢氧燃料电池工作原理如图所示．写出电极A的电极反应式______ ．11.按要求填空(1)对于Fe＋2HCl=FeCl2＋H2↑，改变下列条件对生成氢气的速率有何影响？(填“增大”、“减小”或“不变”)①升高温度：________；②增加盐酸体积：____________；③加入等体积的NaCl溶液：__________；④滴入几滴CuSO4溶液：____________；(2)一定温度下，反应N2(g)＋O2(g) =2NO(g)在密闭容器中进行，回答下列措施对化学反应速率的影响。
高三第三次限时训练
高三物理第三次限时训练一、选择题（3、5、9多选）1．在广州亚运会田径比赛男子110米栏决赛里，中国飞人刘翔以13秒09摘得金牌，实现了亚运会110米栏三连冠，他的成绩同时也刷新了亚运会纪录．关于比赛的下列说法中正确的是（ ） A ．在110 m 栏比赛中，选手通过的路程就是位移 B ．13秒09是刘翔夺冠的时刻C ．刘翔比赛中的平均速度约是8.4 m/sD ．刘翔冲过终点线时的速度一定等于8.4 m/s2．如图所示，小物体分别沿着两个不同的光滑面从静止开始下滑，开始时两物高度相同，滑过的路程相同，则下滑时间( )A ．t A >tB B ．t A <t BC ．t A ＝t BD ．无法确定3．某物体以30m/s 的初速度竖直上抛，不计空气阻力，g ＝10m/s 2，则5s 内物体的( ) A ．路程为65m B ．位移大小为25m ，方向竖直向上C ．速度改变量的大小为10m/s ，方向竖直向下D ．平均速度大小为13m/s ，方向竖直向上4．一汽车从静止开始做匀加速直线运动，然后刹车做匀减速直线运动，直到停止。
下列速度v 和位移x 的关系图象中，能描述该过程的是（ ）5．如图所示，在光滑的斜面上放置3个相同的小球(可视为质点)，小球1、2、3距斜面底端A 点的距离分别为x 1、x 2、x 3，现将它们分别从静止释放，到达A 点的时间分别为t 1、t 2、t 3，斜面的倾角为θ，则下列说法正确的是 A.11x t ＝22x t ＝33x t B. 11x t >22x t >33xt C.121x t =222x t =323x t D ．若θ增大，则2x t的值减小 6．每隔0.3s 从同一高度抛出一个小球，小球做初速为6m/s 的竖直上抛运动，设它们在空中不相碰。
第一个小球在抛出点以上能遇到的小球数为（取g ＝10m/s 2）（ ） A.三个 B.四个 C.五个 D.六个7．如图所示，质量为M 足够长的长木板A 静止在光滑的水平地面上，质量为m 的物体B 以水平速度v 0冲上A ，由于摩擦力作用，最后停止在木板A 上。
限时练3 蓝细菌、酵母菌、病毒-2024年高三二轮复习生物学(配人教版)
1 2 3 4 5 6 7 8 9 10 11 12
精准强化
解析 病毒营寄生生活，根据“宫颈癌是由人乳头瘤病毒(HPV)引起的发病率 较高的癌症之一”，可知HPV侵入人体宫颈等细胞内才能增殖，A正确；抗原 具有特异性，可刺激机体产生特异性的抗体、记忆细胞或细胞毒性T细胞，根 据“该疫苗能预防9种类型的HPV”，说明九价HPV疫苗具有与9种HPV相似的 抗原结构，B正确；细胞毒性T细胞可识别抗原，作用是使靶细胞裂解死亡，释 放抗原，细胞毒性T细胞不能直接消灭抗原(HPV)，C错误；初次免疫产生的抗 体和记忆细胞相对较少，而二次免疫可刺激记忆细胞迅速增殖分化形成浆细胞， 产生大量抗体，故3次注射可获得大量的抗体和记忆细胞，D正确。
1 2 3 4 5 6 7 8 9 10 11 12
精准强化
解析 结合题图可知，裂解周期发生了噬菌体DNA的复制、噬菌体蛋白质外壳 的合成等，A正确；从图示可以看出，溶原周期没有噬菌体蛋白质外壳的合成， B错误；裂解周期和溶原周期内均有DNA的合成，因此两过程中均有磷酸二酯 键的形成，结合图示可知，裂解周期内细菌的拟核DNA被裂解，溶原周期内亲 代噬菌体的DNA整合到细菌DNA上，这两个过程中均有磷酸二酯键的断裂，C 正确；图中具溶原周期的噬菌体能将其DNA整合到宿主细胞DNA上，据此推测 该类噬菌体能作为目的基因的载体，D正确。
1 2 3 4 5 6 7Байду номын сангаас8 9 10 11 12
精准强化
4.(2023·广东汕头调研)下列关于酵母菌在“发面”过程生理活动的叙述，错误
高三限时小练习(1)
2012届高一限时小练习（3）1．下列词语中，加点字的读音全都正确的一组是（）A．游弋．(yì) 挣揣．(chuài) 虞．美人(yù) 以儆．效尤(jǐng)B．笑靥．(yè) 粘．贴(zhān) 杀．风景(shà) 济．济一堂(jǐ)C．呼吁．(yù) 摇曳．(zhuài) 一溜．烟(1iù) 孜．孜以求(zī)D．憎．恶(zēng) 下载．(zài) 乘．务员(chéng) 结．党营私(jié)2．下列词语中，错别字最多的一组是（）A．卑怯噩梦恰商冷不妨草菅人命B．藐视白晰描摹爆发户恻隐之心C．梦魇诀别殴打引申义独辟蹊径D．燥热遨翔皈依雄纠纠插科打浑3．下列各项中，加点的成语使用不恰当．．．的一项是（）A．神经干细胞的发现，给解答“世界难题”带来了新的希望，即神经干细胞有潜能修复受伤的神经细胞，而这是治疗神经系统疾病釜底抽薪．．．．的办法。
B．面对西班牙人潮水般的攻势，荷兰队在足球城体育场坚持了整整116分钟，但却在最后4分钟的时候败在了伊涅斯塔的绝杀下，荷兰举国上下真是如丧考妣．．．．。
C．七月流火．．．．，商厦里的夏装渐渐让位给秋装，“清仓甩卖”“季末折扣低至三折”等促销信息铺天盖地，价格低得让人心痒痒，忍了多时的扫货瘾一发而不可收。
D．殊不知EMI集团属下的各大唱片公司互相倾轧、争斗，互挖墙脚。
面对一个个财大气粗的“诸侯”，集团方面深感尾大不掉．．．．，却又无可奈何。
4．下列各句中，没有．．语病的一项是（）A．北京首都国际机场与澳大利亚悉尼机场9月3日在北京人民大会堂共同签署了缔结姊妹机场，这标志着首都机场与澳大利亚悉尼机场正式达成友好合作关系。
B．漫步小巷之间，炊烟缥缈，远山迷离。
这座隐藏在大山深处的近乎原生态的古老村落，远避浮华云烟，永远似乎有着许许多多让人读不懂、道不清的故事。
高三模拟一选考限时训练
高三模拟一选考限时训练 Final approval draft on November 22, 2020模拟一“6＋4＋选考”限时训练[时间：45分钟分值：36＋39＋15]第Ⅰ卷一、选择题(本大题共6小题，每小题6分。
在每小题给出的四个选项中，只有一项是符合题目要求的。
)1选项探究主题实验试剂预期实验结果结论A 某“色拉油”是否含有脂肪苏丹Ⅲ染液被检测液体出现橘黄色不含有脂肪，但可能含有固醇B某“早餐奶”是否含有蛋白质双缩脲试剂被检测液体出现砖红色含有蛋白质，但含量少于淀粉C 某“奶片”是否添加淀粉碘液被检测液体出现蓝色含有淀粉，不含有蛋白质D 某“无糖”无色饮料中是否含有葡萄糖斐林试剂甲液和乙液被检测液体出现砖红色一定含有还原糖，但不一定是葡萄糖2.A．人体内成熟的红细胞中没有线粒体，不能产生ATPB．ATP中的能量可以来源于光能和化学能，也可以转化为光能和化学能C．在有氧与缺氧的条件下，细胞质基质都能形成ATPD．ATP中的“A”与构成DNA、RNA中的碱基“A”表示的不是同一物质3．下图表示人体内干细胞的增殖分化。
下列有关叙述正确的是( )A．干细胞与白细胞的基因型不同，因此合成的mRNA和蛋白质种类也不相同B．血小板和红细胞内遗传信息的流动方向是DNA→DNA→RNA→蛋白质C．图示细胞中，干细胞不仅具有较强的分裂能力，而且分裂周期也较短D．白细胞能够穿过血管壁去吞噬病菌，这是因为细胞膜的选择透过性4．下图中表示转录过程的是( )5．亲缘关系较远的物种，由于相似的生活方式，整体或部分形态结构向着同一方向改变，这属于趋同进化。
在趋同进化过程中( )A．通过相互选择，不同生物的基因库趋于相同B．同一区域的不同物种之间不存在相互选择和影响C．自然选择使不同生物对同一环境产生了相似的适应性D．不同生物将演化为形态结构相似的同一物种6．人工合成的植物激素类似物常用于生产实践。
图1所示是激素类似物甲和激素类似物乙对月季生根的影响，图2所示是激素类似物甲在其X、Y和Z三种浓度下对月季茎段侧芽生长的影响。
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课题语法填空专项练习序号80
四
1.Only if you ask many different questions ______________(你才有可能获得)all
the information you want to know.(acquire)
2.Jean doesn’t want to work right away because she thinks that were
__________________(她求职)she probably woul dn’t be able to see her friends very often.(apply)
3.Seriously ____________________(受到指责)stealing money from the bank，he
was questioned by the police.(accuse)
4.Will you please give us a case ________________(使用这个单词的)？(use)
5.________________(我们必须牢记的)while driving is the traffic rules.(what)
6.Seldom ________________(我犯错误)during my past few years of working
there.(mistake)
7.At last they climbed up the mountain，on the top of ________________(有一座古
庙)dating back to 1500 BC.(lie)
8.At the award ceremony，Mr. Jackson said，“F or me，there has been
________________(没有更大的回报) than your support.”(great)
9.—What do you think of it?
—To be honest，I have never seen ________________(如此让人兴奋的电影)before.(such)
10.Never ________________(我们收到来信)him since he went abroad to seek his
fortune.(hear)
五
1．He wants to go to Paris，but I prefer to go to London；that’s ____________________(我们有分歧的地方)．(differ)
2．With ________________(产量提高了60%)，the company has had another excellent year.(up)
3．He still lives in the room，________________(房间的窗户面朝南)．(face) 4．It’s r eported that by the end of this year the output of cars of the factory ________________(上升)by about 20%.(rise)
5．Tom pretended ________________(没有听说过)it，but in fact，he knew it very well. (hear)
6．The term digital native ________________(正运用到)individuals who have grown up immersed in technology.(apply)
7．The global warming，if __________(不适当控制)，might lead to more natural disasters.(control)
答案：(it is)not properly controlled
8．One more moment，Tom. When I ________________(卖完)the newspapers，I will go with you to the cafe. (sell)
9．________________(不会产生任何影响)to me whether the interviewer is male or female.(difference)
10．It’s only a two hours’ bicycle ride from the city centre to the cottage？________________(举行联欢会的). (hold)
六
1．Children should be encouraged to explore ______________(他们感兴趣的任何事物)．(appeal)
2．The prices of houses，________________(就如经常报道的那样)，have been going up sharply in the past few months.(report)
3．Without your timely help，we __________(会陷入)big trouble that day.(fall) 4．Another important project we are going to carry out is ________________(所称谓的)National Education.(call)
5．It is Shanghai Expo ________________(使中国成为焦点)again all over the world，and many people are wondering what the new giant is going to be in the future.(focus)
6．It is commonly thought that many coal mine accidents ________________(本
来能够避免)if we had followed the strict safety rules.(avoid)
7．If Jack had scored that goal，we ________________(就会赢得那场足球赛了)．(win)
8．The education programme ________________(旨在)combining brain work with manual labor is being widely spread throughout the country.(aim) 9．Were it to rain tomorrow，the sports meet ______________(推迟)until the same time next week.(put)
10．It’s pity that he failed the exam. If he ________________(更加注意)on his handwriting，he would have done better.(concentrate)。