河南省洛阳市2018学年高二上学期期中考试英语试题 含答案

2018-2019学年度上期初一年级期中考试英语试题（本卷含九个大题满分：150分考试时间120分钟）第I卷（共100分）温馨提示：听力马上就要开始了，抓紧时间看题吧！I．听力测试。

（共30分）第一节：情景反应。

（每小题1.5分，共9分）听一遍。

根据你所听到的句子，从A. B. C三个选项中，选出最恰当的答语，并把答题卡上对应题目的答案标号填黑。

1. A. How do you do? B. How are you! C. Fine, thank you.2. A. Good morning. B. Good evening. C. Hi.3. A. P-E-N. B. It’s a pen. C. Yes, P-E-N.4. A. Yes, I am. B. Yes, she is. C. Yes, he is.5. A. OK. B. Yes, thank you. C. Thanks.6. A. You are Jane. B. I’m Jane. C. It’s Jane.第二节：对话理解。

（每小题1.5分，共9分）听一遍。

根据你所听到的对话和问题，从A. B. C三个选项中，选出正确答案，并把答题卡上对应题目的答案标号填黑。

7. A. They’re erasers. B. They’re rulers. C. They’re books.8. A. Yes, she is. B. Yes, he is. C. No, she isn’t.9. A. 10. B. 11. C.12.10. A. Yes, they are. B. No, they aren’t. C. No, they are.11. A. Class 1. B. Class 7. C. Class 3.12. A. Yes, she does. B. Yes, she doesn’t. C. No, she doesn’t.第三节: 长对话理解（每小题1. 5分，共6分）听两遍。

2023——2024学年第二学期期中考试高二英语试卷注意事项：1.答卷前，考生务必将自己的姓名、考号等填写在答题卡和试卷指定位置上。

2.回答选择题时，选出每小题答案后，用铅笔把答题卡上对应题目的答案标号涂黑。

如需改动，用橡皮擦干净后，再选涂其他答案标号。

回答非选择题时，将答案写在答题卡上，写在本试卷上无效。

3.考试结束后，将本试卷和答题卡一并交回。

第一部分听力(共两节，满分30分)第一节(共5小题；每小题1.5分，满分7.5分)听下面5段对话。

每段对话后有一个小题，从题中所给的A、B、C 三个选项中选出最佳选项，并标在试卷的相应位置。

听完每段对话后，你都有10秒钟的时间来回答有关小题和阅读下一小题。

每段对话仅读一遍。

1. How much should the man payA. $8.B. $12.C. $24.2. How is the woman's new roommateA. Noisy.B. Annoying.C. Caring.3. What's the woman going to doA. Get her car washed.B. Go downtown.C. Go for a ride.4. Why was the woman lateA. Because of the weather.B. Because she got up late.C. Because of the traffic jam.5. What did the speakers do before the dialogueA. They saw a movie.B. They watched a match.C. They attended a meeting.第二节(共15小题;每小题1.5分,满分22.5分)听下面5段对话或独白。

每段对话或独白后有几个小题，从题中所给的A、B、C三个选项中选出最佳选项，并标在试卷的相应位置。

2017—2018学年上期期末考试九年级英语试题卷注意：本试卷分试题卷和答题卡两部分．考试试卷100分钟，满分120分。

考生应首先阅读试题卷及答题卡上的相关信息，然后在答题卡上作答，在试题卷上作答无效。

交卷时只交答题卡。

一、听力理解（20小题，每小题1分，共20分）第一节听下面五段对话。

每段对话后有一个小题，从题中所给的A、B、C三个选项中选出最佳选项，井在答题卡上将该项涂黑。

每段对话读两遍。

1. What is the man?A. A servant.B. A waiter.C. A director.2. What happened to Mary?A. She missed the train.B. She took the wrong seat.C. She lost her wallet.3. How is the school now?A. It’s not as good as it was.B. It’s better than it used to be.C. It’s wo rse than people say.4. When will the movie start?A. At 10 o’clock.B. At 10:30.C. At 10:50.5. What did the woman advise the man to do?A. Go to see a doctor at once.B. Give up solving the problem.C. Be patient with the problem.第二节听下面几段对话或独白。

每段对话或独白后有几个小题，从题中所给的A、B、C三个选项中选出最佳答案，并将其标号填入题前括号内。

每段对话或独白读两遍。

听下面一段对话，回答第6至第8三个小题。

6. Who sent the scarf to Tina?A. Her mother.B. Her boyfriend.C. Her brother.7. Where does Tina come from?A. Sydney.B. London.C. New York.8. Who are the two speakers?A. Relatives.B. Neighbors.C. Classmates.听下面一段独白，回答第9至第10两个小题。

河南省洛阳市2022-2023学年高一上学期期中英语试题学校:___________姓名：___________班级：___________考号：___________一、阅读理解Each country and culture has its own set of public holidays and festivals. While some of these holidays and festivals like Christmas and New Year are common across the world, there are many more holidays that are unknown outside of national borders.1. Blessed Rainy DayLife in a country where it rains a lot can be hard. In Bhutan, Blessed Rainy Day is the holiday marking the end of the monsoon season(雨季). On this day, everyone is encouraged to enjoy a bath out of the house to wash away bad luck.2. Melon DayTurkmenistan’s Melon Day is a celebration of their national fruit. It takes place on the second Sunday in August. Thousands of mouth-watering melons are given away in the heat of the Turkmen capital Ashgabat on Sunday to celebrate Melon Day.3. “Punch Your Neighbor” FestivalThe cities of Potosi and Macha in Bolivia hold the festival in the Bolivian Andes Mountains in May every year. It’s celebrated by thousands of people and it’s based on the Quechua word “Tinku” that means “meeting”. The meaning of the word has become worse as it now is celebrated with beatings that can actually really hurt people.4. Haxey HoodThe Haxey Hood game in England has a big group of people trying to push a small leather tube (管子) towards one of the four pubs (酒馆) in town, where it will stay until the following year’s game. Once a person has the tube, he cannot run with it or throw it. He has to pass it on to people on his team. The game usually lasts a few hours.1．How do people celebrate Blessed Rainy Day most probably?A．By pouring water on others.B．By belssing rainy days indoors.C．By getting wet in the rain.D．By taking a bath in the bathroom. 2．Where would you go if you want to get free fruit?A．To Bhutan.B．To Turkmenistan.C．To Bolivia.D．To England. 3．What should people do in Haxey Hood?A．Run with a team.B．Push each other forward.C．Try to win a drink at a pub.D．Pass a tube towards a pub.Many of my friends meet on Wednesday in the morning to go to a specific parking lot sale held at a second-hand store. We love it because we can put whatever fits into the grocery bag for just $1.As we finished one day and paid our dollars, we noticed the clothing that remained was being thrown into their trash (垃圾) can. We asked why, and they said they had no room for the extra clothes. I asked them why they have not contacted other places like churches, shelters for women and children. They said they did several times in the past and they only came two or three times and stopped as they had to be there at a specific time in the morning which was right after the parking lot sale. After coming a few times, most of these organizations quit.Well, we said that we could take whatever was left. They agreed! So we loaded our two cars up to the roadside and dragged it to our city. We have done this every Wed now for two years! We opened up a clothing closet called Gifts Of Grace when a storage facility donated two units to us. We were holding yard sales and markets until then for anyone who needed clothing.Now we have a real building and advertise free clothing for anyone who has the need. We have served hundreds of families in the tough economy (经济) so far with the clothing they were just going to throw away. Now our community is better because of it. Their lives are made a bit easier to have this opportunity to find nice clothing for not one single penny.We volunteer and run it about two or three days a week.4．Why did the organizations quit according to the workers at the store?A．They didn’t arrive on time.B．They didn’t need the clothes. C．They didn’t have extra space.D．They didn’t have a suitable time. 5．What does the underlined word “it” in the third paragraph refer to?A．The author’s car.B．The remaining clothing.C．The specific parking lot.D．The author’s grocery bag.6．How does the author feel about what he has done?A．Fortunate.B．Proud.C．Inspired.D．Surprised. 7．Which of the following may the author agree with?A．When you help others, you also help yourself.B．A friend indeed is known by sharing his wealth.C．One person’s trash is another person’s treasure.D．It is everyone’s responsibility to make use of waste.An early night can work wonders for kids with new research showing sleep can reduce Body Mass Index (BMI) just as well as exercise.Australian scientists have discovered that while physical exercise gives great all-round health and wellbeing, children can achieve the same 7.4 per cent reduction in BMI by either exercising 17 minutes more a day, sleeping an extra 52 minutes or reducing their sitting time by an extra 56 minutes.The study, from the University of South Australia, the Murdoch Children’s Research Institute and the National Heart Foundation of Australia, assessed (评估)1,179 children aged 11 and 12.“International guidelines suggest that children need 9 to 11 hours of sleep, 60 minutes of physical exercise and no more than two hours of relaxing screen time per day, yet only 7 per cent of children can meet these goals,” said lead researcher Dr. Dot Dumuid, from the University of South Australia.Queensland sleep expert Amanda Bude said sleep had an influence on children’s physical and mental (心理的) health. “Sleep health is not just about the physical characteristics (特征) of health but also the mental health and safety of our teens. Not getting enough of sleep can have a bad influence on emotional development and even cause some mental health problems. It is so important that parents are able to help their children deal with the over scheduling of their busy lives and keep healthy as well. As a child enters the teenage years their circadian clock (生物钟) starts to set later and later and finding a balance is important,” she said.Sunshine Coast mum Cindy Buswell said keeping her four children active during the day helped them get a good night’s sleep. “Good sleep and exercise should go hand-in-hand not one or the other,” she said.Sandringham mum Maxine Thomson also thought that sleep was important for her two daughters. “They have always had pretty good habits. At 8 p.m. we do reading and wind down.” she said.8．How long do the international guidelines suggest for children’s screen time?A．Only one hour.B．Just two hours.C．Not more than one hour.D．Less than two hours.9．How does the author develop the passage?A．By giving explanations.B．By following time order.C．By asking questions.D．By showing cause and effect. 10．What does the underlined phrase “wind down” in the last paragraph mean?A．Relax slowly.B．Suddenly stop.C．Fall asleep.D．Get recovered.11．What’s a suitable title for the passage?A．Do the right amount of sleep and never overdo itB．Sleep is just as good as exercise to keep kids healthyC．Sleeping too much can be bad for your mental healthD．Health and wellness are dependent on sleep and exerciseYou have probably heard the saying, “When life gives you lemons (柠檬), make lemonade.” Since lemons are considered bitter and lemonade is considered sweet, the saying tells you to make the best out of a bad situation.Unfortunately, when something bad happens, it’s not uncommon for most people to talk about it to anyone who’ll listen, and complain (抱怨) about life, “Why me?” That’s like getting a bag of lemons, putting them down, and thinking “Lemons taste bad! I’d rather have chocolate!” If you don’t make anything with the lemons, they will go bad. But what if you did something with them? What if you made lemonade? Isn’t it possible to do something similar with a bad situation? Here’s an example: Let’s say you’re about to go to the movies, but you discover you have a flat tire (瘪胎). You consider this a terrible thing. After all, you are really looking forward to spending some time with Ryan Gosling and Emma Stone. Now you’re all stressed out, hating the tire, the car, and your life. But what if you called AAA, got your tire fixed or got caught up on things that you’d been meaning to do? What if you did some reading, or had coffee with a friend instead? A bad experience can be turned into something good. Almost anything can work itself out into something better. You can’t change what has happened, right? So make the best of it. I’m not saying it will be easy. The easy thing to do is complain about your bad situation and not consider what it could be turned into.Next time when some unfortunate things happen stop and think, “How can I turn thisaround? How can I make it an awesome experience?” You needn’t fear difficulties. As long as you keep on changing it, you will see the benefits at last.12．Why does the author quote the saying in paragraph 1?A．To lead in the topic.B．To raise a question.C．To tell the difference.D．To introduce the speaker.13．What do most people usually do when something bad happens?A．Accept it.B．Find out the reasons.C．Ask others for help.D．Complain about it.14．Why does the author use the example of seeing a movie?A．To tell us how to avoid awkward situations.B．To tell us that a flat tire happens from time to time.C．To tell us what we can do when in bad situations.D．To tell us meeting film stars is a very exciting experience.15．According to the author, what is the best way to deal with a bad situation?A．Trying hard to solve it.B．Laughing your way through it. C．Turning it into something good.D．Thinking more about its benefits.二、七选五We all know what harmful drinks can cause: obesity, heart problems, stomach pain, skin diseases, calories... This list sounds so scary so I don’t want to continue it. But what if… what if we completely replace all drinks with water. ____16____You lose weight faster.Yeah, you do! No special diet is required. You replace all drinks with water for 9 days, and you’ll lose the equal amount of calories as when jogging for 8 kilometers a day.____17____ I’m going to try it out. Are you?Your brain works better.Do you know that your brain is 75% to 85% water—nothing else just water? So by drinking, you fuel it, which helps you concentrate. Drink water to work more efficiently. Cope with all daily tasks quickly. ____18____ Doesn’t this sound like a dream?Your heart works better.Yes, it’s a true fact. Five glasses of water a day lowers the risk of a heart attack by 41%!____19____ So what are you waiting for? Have a glass of water to stay healthy.____20____Water reduces appetite (食欲), which helps you lose weight. Also sometimes, we confuse hunger with thirst. If you suddenly want to eat something high-calorie, maybe all you need is just a glass of water. Try it out next time you feel hungry. It really works.A．You eat less.B．You never feel thirsty.C．How can we change our life?D．This number is really impressive.E．What would happen with our bodies then?F．And you will stay energized even late in the evening.G．This seems to be a great way to stay slim without much effort.三、完形填空water, its _____33_____ became hardened. The coffee beans were different, however. After they were in the boiling water, they had changed the _____34_____. “Which are you?” he asked. “When challenge knocks on your door, how do you _____35_____? Are you a carrot, an egg, or a coffee bean?”21．A．making up B．giving up C．keeping up D．signing up 22．A．quit B．failed C．asked D．arose 23．A．filled B．covered C．cleaned D．washed 24．A．kindly B．happily C．impatiently D．independently 25．A．on B．off C．up D．down 26．A．Fed up with B．Catching up with C．Turning to D．Moved by 27．A．applied B．described C．argued D．replied 28．A．pulling B．letting C．biting D．putting 29．A．sharply B．awkwardly C．disappointedly D．humbly 30．A．strength B．relief C．challenge D．failure 31．A．drinking B．feeling C．passing D．suffering 32．A．removed B．broken C．boiled D．prepared 33．A．sound B．side C．face D．inside 34．A．water B．function C．power D．pot 35．A．respond B．recover C．choose D．calm四、用单词的适当形式完成短文阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。

2017-2018学年河南省洛阳市高二（上）期中数学试卷一、选择题：本大题共12小题，每小题5分，共60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．（5分）已知集合A={x|x2﹣x﹣6＜0}，B={x|x2+2x﹣8＞0}，则A∪B=（）A．{x|2＜x＜3}B．{x|﹣2＜x＜3}C．{x|x＞﹣4或x＞2}D．{x|x＜﹣4或x ＞﹣2}2．（5分）△ABC中，==，则△ABC一定是（）A．直角三角形B．钝角三角形C．等腰三角形D．等边三角形3．（5分）若a，b，c∈R，且a＞b，则下列不等式一定成立的是（）A．＞0 B．（a﹣b）c2＞0 C．ac＞bc D．a+c≥b﹣c4．（5分）在等比数列{a n}中，a n＞0，已知a1=6，a1+a2+a3=78，则a2=（）A．12 B．18 C．24 D．365．（5分）设正实数a，b满足2a+3b=1，则的最小值是（）A．25 B．24 C．22 D．166．（5分）海中有一小岛，海轮由西向东航行，望见这岛在北偏东75°，航行8n mile以后，望见这岛在北偏东60°，海轮不改变航向继续前进，直到望见小岛在正北方向停下来做测量工作，还需航行（）n mile．A．8 B．4 C．D．7．（5分）设等差数列{a n}的公差d≠0，且a2=﹣d，若a k是a6与a k+6等比中项，则k=（）A．5 B．6 C．9 D．368．（5分）若函数f（x）=的定义域是R，则实数a的取值范围是（）A．（﹣2，2）B．（﹣∞，﹣2）∪（2，+∞）C．（﹣∞，﹣2]∪[2，+∞）D．[﹣2，2]9．（5分）已知△ABC的内角A、B、C的对边分别为a、b、c．若a=bcosC+csinB，且△ABC的面积为1+．则b的最小值为（）A．2 B．3 C．D．10．（5分）设等差数列{a n}的前n项和为S n，S15＞0，a8+a9＜0，则使＜0成立的最小自然数n的值为（）A．15 B．16 C．17 D．1811．（5分）在平而直角坐标系中，不等式组表示的平面区域面积为π，若x，y满足上述约束条件，则z=的最小值为（）A．﹣1 B．C．D．12．（5分）已知数列{a n}中，a1=2，若a n+1﹣a n=a n2，设T m=，若T m＜2018，则正整数m的最大值为（）A．2019 B．2018 C．2017 D．2016二、填空题：本题共4个小题，每小题5分，共20分．x＜0|2＜x＜3}B.{x|-2＜x＜3}C.{x|x＞13．（5分）不等式组表示的平面区域内的整点坐标是．14．（5分）已知△ABC的内角A，B，C的对边分别为a，b，c，若a=2且sinA+cosA=2，则角C的大小为．15．（5分）如图所示，在圆内接四边形ABCD中，AB=6，BC=3，CD=4，AD=5，则四边形ABCD的面积为．16．（5分）已知数列{a n}中，a1=l，S n为其前n项和，当n≥2时，2a n+S n2=a n S n成立，则S10=．三、解答题：本大题共6个小题，共70分．解答应写出文字说明、证明过程或盐酸步骤．17．（10分）在△ABC中，角A，B，C所对的边分别为a，b，c，已知a2+c2﹣b2=﹣ac．（1）求B；（2）若，，求a，c．18．（12分）已知方程x2+2（a+2）x+a2﹣1=0．（1）当该方程有两个负根时，求实数a的取值范围；（2）当该方程有一个正根和一个负根时，求实数a的取值范围．19．（12分）已知{a n}是各项均为正数的等比数列，且a1+a2=6，a1a2=a3．（1）求数列{a n}的通项公式；（2）{b n}为各项非零的等差数列，其前n项和S n=n2，求数列的前n项和T n．20．（12分）某市园林局将一块三角形地块ABC的一个角AMN建设为小游园，已知A=120°，AB，AC的长度均大于400米，现要在边界AM，AN处建设装饰墙，沿MN建设宽1.5米的健康步道．（1）若装饰墙AM，AN的总长度为400米，AM，AN 的长度分别为多少时，所围成的三角形地块AMN的面积最大？（2）若AM段装饰墙墙髙1米，AN段装饰墙墙髙1.5米，AM段装饰墙造价为每平方米150元，AN段装饰墙造价为每平方米100元，建造装饰墙用了90000元．若建设健康步道每100米需5000元，AM，AN的长度分别为多少时，所用费用最少？21．（12分）已知△ABC为锐角三角形，角A，B，C的对边分别为a，b，c且（b2+c2﹣a2）tanA=bc．（1）求角A的大小；（2）若a=，求2b﹣c的取值范围．22．（12分）设数列{a n}的前n项和为S n，且S n=4﹣a n﹣．（1）令b n=2n﹣1•a n，证明数列{b n}为等差数列，并求{b n}的通项公式；（2）是否存在n∈N*，使得不等式成立，若存在，求出λ的取值范围，若不存在，请说明理由．2017-2018学年河南省洛阳市高二（上）期中数学试卷参考答案与试题解析一、选择题：本大题共12小题，每小题5分，共60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．（5分）已知集合A={x|x2﹣x﹣6＜0}，B={x|x2+2x﹣8＞0}，则A∪B=（）A．{x|2＜x＜3}B．{x|﹣2＜x＜3}C．{x|x＞﹣4或x＞2}D．{x|x＜﹣4或x ＞﹣2}【分析】解不等式得出集合A、B，根据并集的定义写出A∪B．【解答】解：集合A={x|x2﹣x﹣6＜0}={x|（x+2）（x﹣3）＜0}={x|﹣2＜x＜3}，B={x|x2+2x﹣8＞0}={x|（x+4）（x﹣2）＞0}={x|x＜﹣4或x＞2}，则A∪B={x|x＜﹣4或x＞﹣2}．故选：D．【点评】本题考查了解不等式与集合的运算问题，是基础题．2．（5分）△ABC中，==，则△ABC一定是（）A．直角三角形B．钝角三角形C．等腰三角形D．等边三角形【分析】由，利用正弦定理可得tanA=tanB=tanC，再利用三角函数的单调性即可得出．【解答】解：由正弦定理可得：=，又，∴tanA=tanB=tanC，又A，B，C∈（0，π），∴A=B=C=，则△ABC是等边三角形．故选：D．【点评】本题考查了正弦定理、三角函数的单调性，考查了推理能力与计算能力，属于中档题．3．（5分）若a，b，c∈R，且a＞b，则下列不等式一定成立的是（）A．＞0 B．（a﹣b）c2＞0 C．ac＞bc D．a+c≥b﹣c【分析】对于A，根据不等式的性质即可判断，举反例即可判断B，C，D【解答】解：A、∵a﹣b＞0，c2＞0，∴＞0B、∵a﹣b＞0，∴（a﹣b）2＞0，又c2≥0，∴（a﹣b）2c≥0，本选项不一定成立，C、c=0时，ac=bc，本选项不一定成立；D、当a=﹣1，b=﹣2，c=﹣3时，a+c=﹣4，b﹣c=1，显然不成立，本选项不一定成立；故选A【点评】此题考查了不等式的性质，利用了反例的方法，是一道基本题型．4．（5分）在等比数列{a n}中，a n＞0，已知a1=6，a1+a2+a3=78，则a2=（）A．12 B．18 C．24 D．36【分析】先求出公比q，即可求出答案．【解答】解：设公比为q，由a1=6，a1+a2+a3=78，可得6+6q+6q2=78，解得q=3或q=﹣4（舍去），∴a2=6q=18，故选：B【点评】本题考查了等比数列的通项公式，属于基础题．5．（5分）设正实数a，b满足2a+3b=1，则的最小值是（）A．25 B．24 C．22 D．16【分析】直接利用函数的关系式及均值不等式求出函数的最小值．【解答】解：正实数a，b满足2a+3b=1，则=（2a+3b）（）=+9≥13+12=25，故的最小值为25．故选：D．【点评】本题考查的知识要点：函数的关系式的恒等变换，均值不等式的应用．6．（5分）海中有一小岛，海轮由西向东航行，望见这岛在北偏东75°，航行8n mile以后，望见这岛在北偏东60°，海轮不改变航向继续前进，直到望见小岛在正北方向停下来做测量工作，还需航行（）n mile．A．8 B．4 C．D．【分析】作出示意图，根据等腰三角形锐角三角函数的定义即可求出继续航行的路程．【解答】解：设海岛位置为A，海伦开始位置为B，航行8n mile后到达C处，航行到D处时，海岛在正北方向，由题意可知BC=8，∠ABC=15°，∠BCA=150°，∠ADC=90°，∠ACD=30°，∴∠BAC=15°，∴AC=BC=8，∴CD=AC•cos∠ACD=4．故选C．【点评】本题考查了解三角形的应用，属于基础题．7．（5分）设等差数列{a n}的公差d≠0，且a2=﹣d，若a k是a6与a k+6等比中项，则k=（）A．5 B．6 C．9 D．36【分析】运用等差数列的通项公式，以及等比数列的中项的性质，化简整理解方程即可得到k的值．【解答】解：等差数列{a n}的公差d≠0，且a2=﹣d，可得a1=a2﹣d=﹣2d，则a n=a1+（n﹣1）d=（n﹣3）d，若a k是a6与a k+6的等比中项，即有a k2=a6a k+6，即为（k﹣3）2d2=3d•（k+3）d，由d不为0，可得k2﹣9k=0，解得k=9（0舍去）．故选：C．【点评】本题考查等差数列的通项公式和等比数列中项的性质，考查化简整理的运算能力，属于基础题．8．（5分）若函数f（x）=的定义域是R，则实数a的取值范围是（）A．（﹣2，2）B．（﹣∞，﹣2）∪（2，+∞）C．（﹣∞，﹣2]∪[2，+∞）D．[﹣2，2]【分析】要使函数有意义，则2﹣1≥0，解得即可．【解答】解：要使函数有意义，则2﹣1≥0，即x2+ax+1≥0，∴△=a2﹣4≤0，解得﹣2≤a≤2，故选：D【点评】本题考查了函数的定义域和不等式的解法，属于基础题．9．（5分）已知△ABC的内角A、B、C的对边分别为a、b、c．若a=bcosC+csinB，且△ABC的面积为1+．则b的最小值为（）A．2 B．3 C．D．【分析】已知等式利用正弦定理化简，再利用诱导公式及两角和与差的正弦函数公式化简，求出tanB的值，确定出B的度数，利用三角形面积公式求出ac的值，利用余弦定理，基本不等式可求b的最小值．【解答】解：由正弦定理得到：sinA=sinCsinB+sinBcosC，∵在△ABC中，sinA=sin[π﹣（B+C）]=sin（B+C），∴sin（B+C）=sinBcosC+cosBsinC=sinCsinB+sinBcosC，∴cosBsinC=sinCsinB，∵C∈（0，π），sinC≠0，∴cosB=sinB，即tanB=1，∵B∈（0，π），∴B=，=acsinB=ac=1+，∵S△ABC∴ac=4+2，由余弦定理得到：b2=a2+c2﹣2accosB，即b2=a2+c2﹣ac≥2ac﹣ac=4，当且仅当a=c时取“=”，∴b的最小值为2．故选：A．【点评】此题考查了正弦、余弦定理，基本不等式以及三角形的面积公式，熟练掌握定理及公式是解本题的关键，属于中档题．10．（5分）设等差数列{a n}的前n项和为S n，S15＞0，a8+a9＜0，则使＜0成立的最小自然数n的值为（）A．15 B．16 C．17 D．18【分析】由于S15==15a8＞0，a8+a9＜0，可得a8＞0，a9＜0，进而得出．【解答】解：∵S15==15a8＞0，a8+a9＜0，∴a8＞0，a9＜0，∴S16==8（a8+a9）＜0，则使＜0成立的最小自然数n的值为16．故选：B．【点评】本题考查了等差数列的通项公式与求和公式及其性质、不等式的性质，考查了推理能力与计算能力，属于中档题．11．（5分）在平而直角坐标系中，不等式组表示的平面区域面积为π，若x，y满足上述约束条件，则z=的最小值为（）A．﹣1 B．C．D．【分析】由约束条件作出可行域，由z==1+，而的几何意义为可行域内的动点与定点P（﹣3，2）连线的斜率．结合直线与圆的位置关系求得答案．【解答】解：∵不等式组（r为常数）表示的平面区域的面积为π，∴圆x2+y2=r2的面积为4π，则r=2．由约束条件作出可行域如图，由z==1+，而的几何意义为可行域内的动点与定点P（﹣3，2）连线的斜率．设过P的圆的切线的斜率为k，则切线方程为y﹣2=k（x+3），即kx﹣y+3k+2=0．由=2，解得k=0或k=﹣．∴z=的最小值为1﹣=﹣．故选：C．【点评】本题考查简单的线性规划，考查了数形结合的解题思想方法和数学转化思想方法，是中档题．12．（5分）已知数列{a n}中，a1=2，若a n+1﹣a n=a n2，设T m=，若T m＜2018，则正整数m的最大值为（）A．2019 B．2018 C．2017 D．2016=a n2+a n=a n（a n+1）≥6，推导出=，从而【分析】a n+1，进而T m=m﹣（﹣）＜m﹣，由此能求出正整数m的最大值．【解答】解：由a n﹣a n=a n2，得a n+1=a n2+a n=a n（a n+1）≥6，+1∴=，∴=﹣，∴++…+=（﹣）+（﹣）+…+（﹣）=﹣∈（0，），∵，∴T m==m﹣（﹣）=m﹣+＜m﹣+=m﹣∵T m＜2018，∴m﹣＜2018，∴m＜2018+∴正整数m的最大值为2018，故选：B【点评】本题考查了数列递推关系、放缩法，考查了推理能力与计算能力，属于中档题．二、填空题：本题共4个小题，每小题5分，共20分．x＜0|2＜x＜3}B.{x|-2＜x＜3}C.{x|x＞13．（5分）不等式组表示的平面区域内的整点坐标是（﹣1，1）．【分析】先根据不等式组画出可行域，再验证哪些当横坐标、纵坐标为整数的点是否在可行域内．【解答】解：根据不等式组画出可行域如图：由图象知，可行域内的点的横坐标为整数时x=﹣1，纵坐标可能为﹣1或﹣2即可行域中的整点可能有（﹣1，1）、（﹣1，2），经验证点（﹣1，1）满足不等式组，（﹣1，2）不满足不等式组，∴可行域中的整点为（﹣1，1），故答案为：（﹣1，1），【点评】本题考查一元二次不等式表示的区域，要会画可行域，同时要注意边界直线是否能够取到，还要会判断点是否在可行域内（点的坐标满足不等式组时，点在可行域内）．属简单题．14．（5分）已知△ABC的内角A，B，C的对边分别为a，b，c，若a=2且sinA+cosA=2，则角C的大小为．【分析】利用三角恒等变换求出A，再利用正弦定理得出C．【解答】解：∵sinA+cosA=2，即2sin（A+）=2，∵0＜A＜π，∴A+=，即A=，由正弦定理得：，即，∴sinC=，∴C=或C=（舍）．故答案为：．【点评】本题考查了正弦定理，属于基础题．15．（5分）如图所示，在圆内接四边形ABCD 中，AB=6，BC=3，CD=4，AD=5，则四边形ABCD 的面积为 6．【分析】利用余弦定理可求BD 2=5﹣4cosA=25+24cosA ，解得cosA=，结合范围0＜A ＜π，利用同角三角函数基本关系式可求sinA ，利用三角形面积公式即可计算得解．【解答】解：∵四边形ABCD 圆内接四边形， ∴∠A +∠C=π，∵连接BD ，由余弦定理可得BD 2=AB 2+AD 2﹣2AB•AD•cosA=36+25﹣2×6×5cosA=61﹣60cosA ， 且BD 2=CB 2+CD 2﹣2CB•CD•cos （π﹣A ） =9+16+2×3×4cosA=25+24cosA ， ∴61﹣60cosA=25+24cosA ， ∴cosA= 又0＜A ＜π， ∴sinA=．∴S 四边形ABCD =S △ABD +S △CBD =AB•AD•sinA +CD•CB•sin （π﹣A ）=×6×5×+×3×4×=6，故答案为：6【点评】本题主要考查了余弦定理，同角三角函数基本关系式，三角形面积公式的应用，考查了转化思想和数形结合思想的应用，属于中档题．16．（5分）已知数列{a n}中，a1=l，S n为其前n项和，当n≥2时，2a n+S n2=a n S n成立，则S10=．S n=S n﹣1﹣S n，可得数列{}是首项为1，公差为的等【分析】由已知得S n﹣1差数列，从而能求【解答】解：∵2a n+S n2=a n S n，∴S n2=a n（S n﹣2），a n=S n﹣S n﹣1（n≥2），∴S n2=（S n﹣S n﹣1）（S n﹣2），S n=S n﹣1﹣S n，…①即S n﹣1•S n≠0，由题意S n﹣1•S n，得﹣=，将①式两边同除以S n﹣1∵a1=l，∴=1∴数列{}是首项为1，公差为的等差数列，∴=1+（n﹣1）=（n+1）∴S n=，∴S10=，故答案为：【点评】本题考查数列的递推公式和前n项和，属于中档题三、解答题：本大题共6个小题，共70分．解答应写出文字说明、证明过程或盐酸步骤．17．（10分）在△ABC中，角A，B，C所对的边分别为a，b，c，已知a2+c2﹣b2=﹣ac．（1）求B；（2）若，，求a，c．【分析】（1）直接利用关系式的恒等变换，转化为余弦定理的形式，进一步求出B的值．（2）利用正弦定理已知条件求出结果．【解答】解：（1）△ABC中，角A，B，C所对的边分别为a，b，c，已知a2+c2﹣b2=﹣ac．则：，由于：0＜B＜π，解得：B=．（2）由于，所以：a=2c，由及a2+c2﹣b2=﹣ac．得到：a2+c2+ac=7．解得：a=2，c=1．【点评】本题考查的知识要点：余弦定理的应用，正弦定理的应用．18．（12分）已知方程x2+2（a+2）x+a2﹣1=0．（1）当该方程有两个负根时，求实数a的取值范围；（2）当该方程有一个正根和一个负根时，求实数a的取值范围．【分析】（1）当方程有两个负根时，利用判别式△≥0和根与系数的关系求出a的取值范围；（2）根据方程有一个正根和一个负根时，对应二次函数满足f（0）＜0，由此求出实数a的取值范围．【解答】解：方程x2+2（a+2）x+a2﹣1=0的判别式为△=4（a+2）2﹣4（a2﹣1）=16a+20，当△=16a+20≥0时，设方程x2+2（a+2）x+a2﹣1=0两个实数根为x1、x2，则x1+x2=﹣2（a+2），x1x2=a2﹣1；（1）∵方程x2+2（a+2）x+a2﹣1=0有两个负根，∴，解得，即a＞1或﹣≤a＜﹣1，∴实数a的取值范围是[﹣，﹣1）∪（1，+∞）；（2）∵方程x2+2（a+2）x+a2﹣1=0有一个正根和一个负根，∴对应二次函数满足f（0）=a2﹣1＜0，解得﹣1＜a＜1，∴实数a的取值范围是（﹣1，1）．【点评】本题考查了一元二次方程根的分布情况以及判别式和根与系数的关系应用问题，是中档题．19．（12分）已知{a n}是各项均为正数的等比数列，且a1+a2=6，a1a2=a3．（1）求数列{a n}的通项公式；（2）{b n}为各项非零的等差数列，其前n项和S n=n2，求数列的前n项和T n．【分析】（1）设数列{a n}的公比为q，（q＞0），由题意列方程组求得首项和公比，则数列{a n}的通项公式可求；（2）由{b n}的前n项和求得通项，代入，然后利用错位相减法求其前n项和T n．【解答】解：（1）设数列{a n}的公比为q，（q＞0），由a1+a2=6，a1a2=a3，得，解得a1=q=2．∴；（2）当n=1时，b1=S1=1，当n≥2时，b n=S n﹣S n﹣1=n2﹣（n﹣1）2=2n﹣1，∴，∴，，∴=，∴．【点评】本题考查数列递推式，考查了错位相减法求数列的前n项和，是中档题．20．（12分）某市园林局将一块三角形地块ABC的一个角AMN建设为小游园，已知A=120°，AB，AC的长度均大于400米，现要在边界AM，AN处建设装饰墙，沿MN建设宽1.5米的健康步道．（1）若装饰墙AM，AN的总长度为400米，AM，AN 的长度分别为多少时，所围成的三角形地块AMN的面积最大？（2）若AM段装饰墙墙髙1米，AN段装饰墙墙髙1.5米，AM段装饰墙造价为每平方米150元，AN段装饰墙造价为每平方米100元，建造装饰墙用了90000元．若建设健康步道每100米需5000元，AM，AN的长度分别为多少时，所用费用最少？（1）设AM=x米，AN=y米，则x+y=400，△AMN的面积S=xysin120°=xy，【分析】利用基本不等式，可得结论；（2）由题意得，即x+y=600，要使竹篱笆用料最省，只需MN最短，利用余弦定理求出MN，即可得出结论．【解答】解：设AM=x米，AN=y米，则（1）x+y=400，A=120°，△AMN的面积S=xysin120°=xy≤，当且仅当x=y=200时取等号；（2）由题意得150x+1.5y•100=90000，即x+y=600，要使竹篱笆用料最省，只需MN最短，所以MN2=x2+y2﹣2xycos120°=x2+y2+xy=（x+y）2+y2﹣xy=360000﹣xy所以x=y=300时，MN有最小值300．∴AM=AN=300米时，所用费用最少为3×5000=15000元．【点评】本题考查利用数学知识解决实际问题，考查三角形面积的计算，余弦定理的运用，属于中档题．21．（12分）已知△ABC为锐角三角形，角A，B，C的对边分别为a，b，c且（b2+c2﹣a2）tanA=bc．（1）求角A的大小；（2）若a=，求2b﹣c的取值范围．【分析】（1）利用余弦定理列出关系式，代入已知等式变形求出sinA的值，即可确定出角A的大小；（2），由（1）可得A，由正弦定理可得，从而利用三角函数恒等变换的应用可得2b﹣c=2sin（B﹣），结合B的范围B，可得2b﹣c 取值范围．【解答】解：（1）由（b2+c2﹣a2）tanA=bc．及余弦定理b2+c2﹣a2=2bccosA，得sinA=∵△ABC为锐角三角形，∴A=．（2）由正弦定理可得，∴2b﹣c=4sinB﹣2sinC=4sinB﹣2sin（）=3sinB﹣cosB=2sin（B﹣）．∵△ABC为锐角三角形，∴，∴∴，2∴2b﹣c的取值范围为（0，3）【点评】本题主要考查了三角函数恒等变换的应用，考查了正弦定理，正弦函数的图象和性质在解三角形中的应用，属于中档题．22．（12分）设数列{a n}的前n项和为S n，且S n=4﹣a n﹣．（1）令b n=2n﹣1•a n，证明数列{b n}为等差数列，并求{b n}的通项公式；（2）是否存在n∈N*，使得不等式成立，若存在，求出λ的取值范围，若不存在，请说明理由．【分析】（1）由已知可得2a n=a n﹣1+，故2n﹣1•a n=2n﹣2•a n﹣1+1，进而可得数列{b n}为等差数列，并得到{b n}的通项公式；（2）存在n=1，使得不等式成立，且9≤λ≤10，利用对勾函数和反比例函数的图象性质，可得答案．【解答】解：（1）∵数列{a n}的前n项和为S n，且S n=4﹣a n﹣．∴当n=1时，a1=S1=4﹣a1﹣，即a1=1，=4﹣a n﹣1﹣．当n≥2时，S n﹣1则a n=S n﹣S n﹣1=a n﹣1﹣a n﹣，即2a n=a n﹣1+，故2n﹣1•a n=2n﹣2•a n﹣1+1，即2n﹣1•a n﹣2n﹣2•a n﹣1=1，∵b n=2n﹣1•a n，即{b n}是以1为首项，以1为公差的等差数列；即b n=n；（2）由（1）知：⇔，根据对勾函数的性质，可得：在n=3时取最小值，由反比例函数的性质，可得：在n=1时取最大值10；当n=1时，9≤λ≤10；当n=2时，6≤λ≤5，不存在满足条件的λ值；当n=3时，≤λ≤，不存在满足条件的λ值；当n≥4时，不存在满足条件的λ值；综上可得：存在n=1，使不等式成立，9≤λ≤10．【点评】本题考查的知识点是数列与不等式及函数的综合应用，难度中档．。

河南省洛阳市2020-2021学年高一上学期期中测试卷英语第二部分阅读理解（共两节，满分40分）第一节（共15小题；每小题2分，满分30分）阅读下列短文，从每题所给的A、B、C和D四个选项中，选出最佳选项。

AThe holiday season is upon us. These are a few places you can visit without breaking the bank while having a fun and relaxing experience.Lakowe LakesLakowe Lakes is a beautiful golf resort(场所）45 minutes away from the city of Lagos.You can rent(租用）an apartment(公寓）for a couple of days.A trip to Lakowe Lakes will involve activities like fishing at the lake, pedal boat rides,golfing on an18-championship golf course, bike riding, movies under the stars, outdoor barbeques and spa treatments.Inagbe ResortsInagbe Resorts is an excellent choice for whoever wants a getaway from the city especially families. Individuals(个人）or families looking for a quiet place with a beach would love Inagbe.There are facilities(设备）like swimming pools, basketball courts and children playing grounds. It offers different kinds of activities such as watersports, horse rides and quad biking.Calabar Carnival(狂欢节）Calabar Carnival is still one of the best carnivals out of Nigeria. This week-long event, held every December, is filled with fun moments, parades and display of culture. It is also known as Africu's biggest street party.This will be an opportunity to explore Calabar, the national museums,Tortuga island, Mary Slessor house,Drill Ranchm Tinapa resort and the national park.The GambiaThe smiling coast of Africa will make you live more happily than you have ever been.There is an experience for everyone based on your how much money you spend.Explore the city of Banjul, go birdwatching,attend a cooking class, watch crocodiles at the crocodile pool, discover the slave roots of Kunta Kinte, go fishing, lake a hike and visit a village market.21. What common fun do both Lakowe Lakes and The Gambia provide?1A. Bike riding.B. Watching birds.C.Going fishing·D. Outdoor barbeques.22. Which place is the best choice for those who want to get away from city life?A. Lakowe Lakes.B. Inagbe Resorts.C. Calabar Camival.D. The Gambia.23. What can you do at Calabar Camival?A. Rent a house.B. Attend a cooking class.C. Watch movies under the sky.D. Learn about the national park.BGrowing up in Venezuela, there was never really much cause to learn English.For five years,I spent two hours a week completely involved in understanding "to be", numbers, colors,and the differences between saving "good evening" and"good night."I would always get top marks. Yes, that used to be me, walking like a queen among everyday, Spanish speakers. "Bring it on, life." I said. "I can deal with whatever you've got."But when I moved to Canada, life hit me so hard that it knocked me down. Years later, I am still recovering(恢复）. Living in a new land, with different people, new rules, new weather, a new culture and language, 1 was no longer a queen. Did I speak English? No, not at all. So, I went back to school, thinking that it was u challenge I would conquer(克服）in record time. But English was more like af' wall in my path. Even after getting a job, it took all my courage to stop myself from crying, completely at a loss and scared. Learning English, speaking, listening --- it hurt me. Not the language. Not the unkind people. It hurt because I wasn't good, despite(尽管）my efforts.Now,alter almost seven years in Canada, I've decided not to say sorry for my accent. grammar mistakes, or pronunciation. I'm going to run after my dreams and enjoy a beautiful.,rich and fascinating language. Don't get me wrong. My brain still sereams (尖叫）“Give me a break!" from time to time, but that's completely natural. I know it's going to take a while, but at least now I accept the person I am - not the perfect person I thought I was.24.What can we learn about leaning English in Venezuela from the passage?A. Everyone put much lime in it.B. It didn't need much effort.C. Its standard was very high.D. It brought advantages to students.25.What does the underlined sentence in Paragraph I show about the author?A. She was proud of her level of foreign languages.B. She fell confident enough lo face any challenge.2C. She was brave in competitions.D. She looked down on others.26. What happened right after the author moved to Canada?A. She found her feet in the new environment quickly.B. She regretted not working hard in English.C. She quickly put her language talent to use.D. She expected to Improve her English easily.27.We can infer from the last paragraph that the authorA. has a practical understanding of herselfB. can now speak English quite beautifullyC. has conquered English finallyD. is worried about her EnglishCThe Barbie doll has been a favorite toy for young girl since it was first released(发布）in 1959. Yet for a long time, the cute toys were mostly white and skinny.In recent years, however, Barbie dolls with different skin colors and clothing for different careers and hobbies were created. 'This year, kids will have more kinds of Barbie to play with.In January, Mattel, the company behind Barbie, released a new series of dolls. They are remarkable(非凡的）because they have uncommon physical traits(特征）and disabilities.They include a doll with vitiligo(白癜风），a doll with no hair and a doll with a darker skin color.The new Barbie is a far cry from the milky-colored, doll that first appeared in New York City nearly 61 yeans ago. “As we continue to redefine(重新定义）what it means to be a‘Barbic' or look like Barbie, offering a doll with vitiligo in our main doll line allows kids to play out even more stories they see in the world around them, "Mattel wrote on Forbes.Together with the new dolls, Barbie now includes 176 different dolls in total - with nine body types, 35 skin colors and 94 hairstyles, the New York Post noted. It's hoped that children of all sizes, colors and abilities will see themselves and relate to the popular toy.＂A black Barbie with an Afro and a Barbie who uses a wheelchair were top sellers last year, "says Mattel. "The doll with a wheelchair is intended to encourage children like me, who have experienced leg loss of any kind,"a girl wrote on Facebook.＂Barbie is continuing the journey to show a multidimensional(多维的）view of beauty and fashion(时尚）＂a spokesperson for Matte told CBS News.328.The newest Barbies can be described as .monB. specialC. cuteD. unpopular29.Why were so many kinds of Barbies created?A. To meet the social need.B. To make more money.C. To control the doll world.D. To dare the tradition.30. What's the author's purpose in writing Paragraph 5?A. To tell why the new Barbie was disabled.B. To prove disabled children prefer new dolls.C. To show the popularity of the new Barbie.D. To support the company behind Barbie.31. What is the text mainly about?A. Traditional dolls are challenged.B. Disabled children like Barbie dolls.C. Barbie redefines beauty and fashion.D. Disabled Barbie dolls dare to be different.DRobots are useful because they never get tired and can't feel pain. Why program robots to feel pain? Some researchers, however, believe it's a good idea.Researchers from Leibniz University of Hannover in Germany are working to develop an man-made robot nervous system to teach robots how to feel pain, according to IEEE Spectrum.＂Pain is a system that protects us, "said Johannes Kuchn, one of the researchers."When we evade(规避）from the source (来源）of pain, it helps us not get hurt. "Think about how many injuries you would receive if you couldn't feel pain. Even though pain hurts, it helps us to avoid danger and treat our wounds. The same will be true for robots. As a greater number of people work closely with robots , the robots must aet in a safer manner.Kuehn believes that by protecting robots from damage, they'll be protecting people as well.Damage to robots-if left unseen - could lead to workplace accidents.Rather than feel pain, some robots are designed to show pain or see it in others. Minoru Asada, an engineer at Osaka University in Japan, and his workmates have made sensors(传感器）that pick up many kinds of touch signals(信号）。

沧州一中2017-2018学年高二英语期末试题出题人：孙瑞江孟欣杨荣荣审题人：高二英语组第Ⅰ卷第一部分：听力（共两节，满分30分）第一节（共5小题；每小题1.5分，满分7.5分）听下面5段对话。

每段对话后有一个小题，从题中所给的A、B、C三个选项中选出最佳选项，并标在试卷的相应位置。

听完每段对话后，你都有10秒钟的时间来回答有关小题和阅读下一小题。

每段对话仅读一遍。

1.What will the man have for breakfast tomorrow morning?A.BreadB. NoodlesC. A sandwich2.What does the man mean?A.He will go out for lunch alone.B.He is too busy to have lunch.C.He will have lunch in his office.3.When will Frank come back?A.TodayB. TomorrowC. The day after tomorrow4.Where is Betty right now?A.In a meeting roomB. In her officeC. In her house5.What will the speakers do today?A.Catch a planeB. Do some shoppingC. Have a good rest第二节（共15小题；每小题1.5分，满分22.5）听下面5段对话。

每段对话后有几个小题，从题中所给的A、B、C 三个选项中选出最佳选项，并标在试卷的相应位置。

听每段对话前，你将有时间阅读各个小题，每小题5秒钟，听完后，各个小题给出5秒钟的做答时间。

每段对话读两遍。

听第6段材料，回答第6、7题6.What is the final score?A. 3 to 4B. 3 to 5C. 5 to 47.How does the man feel about the fans here?A.They are better than those in Philadelphia.B.They are more than those in Baltimore.C.They are as polite as those in Philadelphia.听第7段材料，回答第8、9题8.Which subjects does the man advise the woman to take in her first semester?A.English and artB. English and musicC. English and math9.Why didn’t the woman want to go to school near home?A.She thinks the teaching quality is poor.B.She wants to experience different things.C.She has to go home every weekend.听第8段材料，回答第10-12题10.When does the man want to fly to Hong Kong at first?A.On the 10th of this month.B.On the 9th of next month.C.On the 10th of next month.11.Which flight leaves Chengdu at 4:30 pm?A.MU705B. HU705C. HU70312.What tickets does the man book at last?A.One-way, first class ones.B.Round-trip, economy class ones.C.One-way, economy class ones.听第9段材料，回答第13-16题13.What happened to the woman’s house?A.It was destroyed by a typhoon.B.It was destroyed by a fire.C.It was destroyed in an earthquake.14.Where is the woman probably living now?A.In a hotelB. In a shelterC. In her friend’s15.What does the man want to know?A.Whether the woman’s house and furniture were insured.B.How the woman can recover from the disaster.C.Whether the insurance company can solve all the problems.16.When will the man go to see the woman with Mackay?A.At about 2 this afternoon.B.At about 4 this afternoon.C.At about 4 tomorrow afternoon.听第10段材料，回答第17-20题17.How old was John?A.ThreeB. FourC. Five18.Where was Leila when she got burned?A.In the schoolB. In the office.C. In the kitchen19.What did John do when he saw the accident?A.He put out the fire.B.He telephoned his father.C.He ran to the neighbor’s for help.20.Whom will John be like according to the passage?A.His fatherB. His grandfatherC. His brother第二部分阅读理解（共两节，满分40分）第一节（共15小题；每小题2分，满分30分）阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项，并在答题卡上将该项涂黑。

河南省洛阳市涧西区第二十二中学2020-2021学年高二英语月考试题含解析一、选择题1. Why do you waste precious time dreaming, ______ waking life is so much better?A. whileB. whenC. howD. because参考答案：B考查从属连词。

句意：当清醒的生活是如此地美好时，你为什么浪费宝贵的时间做梦？when“当……时”符合句意。

选B2. The Washington State Parks and Recreation Commission manages a diverse system of more than 120 parks.A.basicB.standardC.variousD.traditional参考答案：C3. The indoor swimming pool seems to be a great deal more luxurious than ________.A. being necessaryB. to be necessaryC. it is necessaryD. is necessary参考答案：D4. He keeps talking loudly, _____ his classmates angry.A. madeB. to makeC. makingD. makes参考答案：C5. The girl __________ to me that she had __________ the book on the shelf.A. lay; laidB. lied; lainC. lied; laidD. lied; lay参考答案：C6. The students ages ____ 15 to 18. A. range B. ranged C. range from D. ranges from参考答案：C7. If you go to a social occasion in another country, ______ that social rules can be different.A. remember B to remember C. remembering D. to be remembered参考答案：A8. _______ in a friendly way, their quarrel came to an end.A. Being settledB. SettledC. SettlingD. Having settled参考答案：B9. We _____ John’s name on the race list yesterday but for his recent injury.A. will putB. will have putC. would putD. would have put参考答案：D略10. As a teacher you have to ______ your methods to the needs of slower children.A. recommendB. distributeC. reflectD. adjust参考答案：D11. _____of the danger in the street, she had to go home with a friend ______ her.A. Warning; followingB. Having warned; followingC. Having been warned; followingD. Warned; followed参考答案：Dwarn与she是动宾关系,排除B、C;accompany与a friend之间是主谓关系,故第二空用现在分词accompanying作宾补,综合可知选D。

河南省洛阳市嵩县2018-2019学年上学期五年级英语期中考试英语试题题号一二三四五六七八九总分得分评卷人听力部分（四大题，共40分）一、听辨单词。

选出你听到的单词，将其标号填入题前括号内。

每个单词读两遍。

( ) 1. A. really B. read C. run( ) 2. A. fantastic B. fan C. fifty( ) 3. A. thirty B. twenty C. those( ) 4. A. have B. happy C. half( ) 5. A. sixteen B. shorts C. school二、听音标号。

听录音，根据你听到的录音顺序为下列句子标上相应的数字序号。

每个句子读两遍。

（每空2分，共8分）( ) He’s slow now, but healthy?( ) This is Amy’s grandpa.( ) He jumped high and swam very fast.( ) In the past, he ran very fast.三、听选答语。

根据你听到的句子，选出相应的答语，将其标号填入题前括号内。

每个句子读两遍。

（每小题2分，共10分）( ) 1. A. Yes, she did. B. Yes, she can. C. No, she can’t.( ) 2. A. Six apples. B. Six pears. C. Six bananas.( ) 3. A. Yes, he does. B. No, he doesn’t. C. No, he didn’t.( ) 4. A. Yes, he can. B. No, I didn’t. C. Yes, I can.( ) 5. A. I live in London. B. I went to the British Museum.C. I will visit lots of places.四、听一听，选一选，圈一圈。

姓名，年级：时间：铜仁一中2018—2019学年度第二学期高二期末考试英语试题考试时间为120分钟，满分为150分。

第一部分听力（共两节，满分30分)第一节（共5小题;每小题1。

5分，满分7.5分）请听下面5段对话，选出最佳选项。

1。

What is the man doing now?A。

Answering the phone. B. Having a bath。

C. Cooking supper。

2。

What does the woman mean？A。

She needs more time to fix the iPad.B. She doesn’t know how to fix the iPad。

C. The man can have his iPad back by tomorrow。

3。

What do we know about the woman?A. She got a pay raise recently.B. S he hasn’t been feeling well recently.C. She has been late for work quite often recently.4。

How many foreign languages does the man speak？A。

3。

B. 4. C. 5.5. What does the man think of the woman?A。

Considerate B。

Careless C。

Rude第二节(共15小题；每小题1。

5分，满分22。

5分）请听下面5段对话或独白，选出最佳选项.请听第6段材料，回答第6、7题.6.Where is the woman now probably?A。

In a hotel。

B. In a restaurant C。

In a coffee bar。

7. What does the wo man want?A. One egg, some bread and a glass of milk。

2018—2019学年度第二学期期中考试七年级英语试题考试时间：90分钟满分： 150.分第I卷 (共80分)一、单项选择：(共30小题，计30分)( )1. --Where are the twin brothers?--Bob is playing guitar and Bill is playing basketball with his friends.A. the; /B. /; theC. the; theD. /; /( )2. --Can you ______ Chinese ?--No but I can ______stories.A. speak; tellB. speak ; talkC. say; tellD. talk ; say( )3. -- Are you good _____ children?--Yes I think I can help them ____ swimming.A. with; inB. with ; withC. at; withD. for ; with( )4. --_____ do you get up every day?--I get up _____ six.A. What time; inB. When; inC. What time; atD. When ; on( )5. --_____ your brother _____ his homework in the evening?--Yes he does.A. Does;doesB. Do ; doesC. Does; doD. Do ; do( )6.I go to school ____ bike and my sister goes to school _____ foot.A. by; byB. by; onC. on; onD. on ; by( )7.It’s raining all day so I ______ stay at home.A. mustB. have toC. must toD. can( )8.Miss Zhang is strict ____her students and she is strict ____ her work.A. in; inB. with; withC. in; withD. with ; in( )9.Tom _____ the school uniform on weekdays.A. put onB. wearsC. dressesD. puts on( )10.My work is interesting but _______ dangerous.A. a kind ofB. a kindC. kinds ofD. kind of( )11. --Do you believe that paper is made _____ wood?--Yes I do . And you can see that books are made _____ paper?A. from; fromB. from; ofC. of; fromD. of ; of( )12. --Where is your cousin?--He _____ an English exam now.A. hasB. hadC. has hadD. is having( )13. Who is better _______playing basketball you or your brother?A. atB. inC. onD. with( )14. It will _______the workers ten days to finish all the work.A. takeB. spendC. payD. cost( )15. --_______have you stayed in this city?--For more than 10 years.A. How farB. How soonC. How longD. How old( )16. --The TV in your room is still on.--Oh I forgot _______.A. turning it onB. turning it offC. to turn it offD. to turn it on( )17. --Don’t eat in class anymore.--_______.A. Yes you’re rightB. Sorry I won’tC. It doesn’t matterD. I don’t think so( )18. --is it from your home to school?--It’s about ten kilometers.A. How farB. How soonC. How oftenD. How long( )19. --How do you go to work?--I usually go to work _____.A. by a carB. in a carC. on a carD. by cars( )20.________late for school again.A. NotB. Not beC. Don’t beD. Aren’t( )21. People usually ______ "hello" to each other when they make a phone call.A. sayB. speakC. tellD. talk( )22--Here ______ some of my ______.A. is photosB. are photoesC. are photosD. is photos( )23.I like pandas _____ they are beautiful.A. soB. andC. becauseD. but( )24.My parents aren’t at home so I want to ____ you for help.A. showB. helpC. buyD. join( )25.My grandma often _____ jiaozi. Look! She _____ jiaozi for us.A. makes; is makingB. makes; makesC. is making; makesD. is making; is making( )26. --Hello! Is that Lucy ?-- _______.A.What can I do for you ?B. Sorry who are you?C. Yes it’s Lucy speakingD. No I’m not.( )27.There are about two ______ in this small village.A. hundred manB. hundreds manC. hundred menD. hundreds men( )28. It’s five o’clock. The students ________baxxxxseball on the playground.A. playB. playedC. are playingD. plays( )29. --Wow! You play the violin very well Bob.--_______.A. That sounds goodB. Thank youC. You’re so smartD. Not much( )30. --I think Jill is really nice.-- ______. I also want to make friends with her.A. Good luckB. Yes pleaseC. Sounds goodD. Yes you’re right二、完型填空(共10小题，计10分)阅读下面短文，掌握其大意，然后从短文后各题所给的A、B、C、D四个选项中选择能填入相应空白处的最佳选项。

洛阳市2024——2025学年第一学期期中考试高二语文试卷(本试卷共10页，23小题，满分150分。

考试用时150分钟。

)注意事项：1.答卷前，考生务必用黑色字迹钢笔或签字笔将自己的姓名、考生号、考场号和座位号填写在答题卡上。

将条形码横贴在答题卡右上角“条形码粘贴处”。

2.作答选择题时，选出每小题答案后，用2B铅笔把答题卡上对应题目选项的答案信息点涂黑；如需改动，用橡皮擦干净后，再选涂其他答案，答案不能答在试卷上。

3.非选择题必须用黑色字迹钢笔或签字笔作答，答案必须写在答题卡各题目指定区域内相应位置上；如需改动，先划掉原来的答案，然后再写上新的答案；不准使用铅笔和涂改液。

不按以上要求作答的答案无效。

4.考生必须保持答题卡的整洁。

考试结束后，将答题卡交回。

一、现代文阅读(35分)(一)现代文阅读Ⅰ(本题共5小题，19分)阅读下面的文字，完成1~5题。

材料一：红色文化是中国共产党领导中国人民在革命、建设和改革的伟大实践中创造积累的先进文化，蕴含着指引我们党和人民增强信仰、信念、信心，战胜一切强敌、克服一切困难、夺取一切胜利的强大精神力量。

习近平总书记指出：“红色是中国共产党、中华人民共和国最鲜亮的底色。

”红色文化是伴随着马克思主义在中国的传播而形成的。

它创造于新民主主义革命时期，发展于社会主义革命和建设时期，兴盛于改革开放历史新时期，升华于中国特色社会主义新时代，体现着党的性质宗旨，承载着党的初心使命，具有丰富的精神内涵。

红色文化，无论是其所包含的红色思想文化、红色精神文化还是红色物质文化、红色制度文化，都是马克思主义中国化时代化的文化表达，是在中国化马克思主义指导下结出的文化硕果，是具有社会主义属性的文化形态。

以马克思主义为思想灵魂，决定了红色文化具有鲜明的政治立场、崇高的目标追求、深厚的群众基础、博大的世界胸怀，是推进中华民族伟大复兴的强大精神力量。

中国共产党是创造和弘扬红色文化的主导力量，中国共产党人的精神谱系深刻体现着对马克思主义的坚定信仰和共产主义的远大理想，集中体现了党的坚定信念、根本宗旨、优良作风，凝结着中国共产党人艰苦奋斗、牺牲奉献、开拓进取的伟大品格。

河南省2020-2021学年高二上学期期末考试英语试题分类汇编-书面表达河南省郑州市2020-2021学年高二上学期期末考试英语试题书面表达(满分25分)假定你是李华,最近你常看到有老人因不会使用智能手机而在出行、就医、费等日常生活中遇到不便,请用英语给某英文报编辑写一封信反映此事,并提出建议。

内容包括:1．保留现金支付方式；2.为老人提供技术培训;3．组织志愿者帮助老人。

注意：1.词数100左右;2,可以适当增加细节,以使行文连贯3,开头和结尾已为你写好,不计入总词数。

Dear Editor,Yours sincerely,Li Hua 【答案】Possible Version IDear Mr. Smith,Knowing that you are into Chinese tea, I’m writing to invite you to a tea culture exhibition, which I believe will enable you to have a deeper understanding about Chinese tea.The exhibition will be held in the City Library of Zhengzhou from 9 a.m. to 11 a.m. this Sunday. It offers us a great chance to know the long history and rich culture of Chinese tea. Also, you’ll have a close look at a large variety of teas and delicate tea sets. Well, in China tea is the symbol of elegance. You can enjoy the art of tea-making and tea-tasting, which have deep culture meanings. Hope you won’t miss it.I’m looking forward to your early reply.Yours,Li HuaPossible Version IIDear Mr. Smith,Having learnt that you take a great interest in Chinese tea, I’m writing to invite you to a tea culture exhibition.The exhibition, lasting 3 hours from 8:30 a.m. to 11:30 a.m. this Sunday, is scheduled to be held in the City Library. Pictures and descriptions of the culture and history of Chinese tea will be presented. Besides, you can have a closer look at different types of tea and delicate tea sets. The highlight is that you’ll be exposed to the fantastic art of tea-making and have a chance to taste a cup of tea, which is bound to impress you. I think you will like it very much.Looking forward to your reply.Yours,Li Hua河南洛阳市2020--2021学年高二上学期英语期末试卷第二节书面表达（满分25分）请写一篇题目为“A Meaningful Day”的文章描述自己的学校生活，为学校“英语园地”投稿。

洛阳市2017—2018学年第一学期期末考试高二化学试卷本试卷分第Ⅰ卷(选择题)和第Ⅱ卷(非选择题)两部分,共100分,考试时间90分钟第Ⅰ卷(选择题,共50分)本试卷可能用到的相对原子质量:H:1 C:12 N:14 O:16 S:32 Na:23 Fe:56 Cu:64一、选择题(本题共10小题,每小题只有一个选项符合题意,每小题2分,共20分)1.以下能级符号正确的是A. 1pB. 2dC. 3fD.6s2.以下电子排布式属于基态原子的电子排布的是A. 1s12s1B.1s22s12p1C. 1s 22s22p63s2D.1s22s22p63p13.碱性锌锰电池尖得了广泛的应用,根据电池的电极反应,下列判断正确的是A. Zn为负极,MnO2为正极B. Zn为正极,MnO2为负极C.工作时电子由MnO2经外电路流向Zn极D. Zn电极发生还原反应,MnO2电极发生氧化反应4.铅蓄电池充电时, PbSO4A.在阳极生成B.在阴极生成C.在两个电极上生成D.在两个电极上除去5.下列关于电解槽的叙述不正确的是A.与电源正极相连的是电解槽的阴极B.与电源负极相连的是电解槽的阴极C.在电解槽的阳极发生氧化反应D.电子从电源的负极沿导线流入电解槽的阴极6.下列关于铜电极的叙述不正确的是A.锌铜原电池中铜是正极B.在镀件上镀铜时可用金属铜作阳极C.用电解法精炼粗铜吋粗铜作阳极D.用电解法精炼粗铜时纯铜作阳极7.下列物质中,含有共价键的离子晶体是A. KBr B NaOH C. HCl D. I28.下列叙述正确的是A.原子晶体中只含有共价键B.离子晶体中只含有离子键,不含有共价键C.分子晶体中只存在分子间作用力,不含有其他化学键D.任何晶体中,若含有阳离子也一定含有阴离子9下列性质中,可以较充分说明某晶体是离子晶体的是A.具有较高的熔点B.固态不导电,水溶液能导电C.可溶于水D.固态不导电,熔融状态能导电10.X、Y、Z三种元素的原子,其最外层电子排布分别为ns1、3s23p1和2s2p4,由这三种元素组成的化合物的化学式可能是A.XYZ2B.Ⅹ2YZ3CX2 YZ2 D.ⅩYZ3二、选择题(本题共10小题,每小题只有一个选项符合题意,每小题3分,共30分)11.下列说法中正确的是A.在分子中,两个成键的原子间的距离叫做键长B.H-Cl的键能为431.8kJ·mol—1,H—I的键能为298.7kJ·mol—1,这可以说明HCl比HI稳定C.含有极性键的分子一定是极性分子D.键能越大,表示该分子越容易受热分解12.在单质的晶体中,一定不存在A.离子键B.分子间作用力C.共价键D.金属离子与自由电子间的作用13.用VSEPR模型预测下列分子或离子的立体结构,其中正确的是A.H2O与BeCl2为角形(V形)B.CS2与SO2为直线形C.BF3与PCl3为三角锥形D.SO3与CO32—为平面三角形14.等电子体之间结构相似、物理性质也相近。

山东省部分市2023-2024学年高二上学期期中考试英语试题分类汇编完形填空山东省聊城市2023-2024学年高二上学期期中英语试题第一节完形填空（共15小题，每小题1分，满分15分）阅读下面短文，选出最佳选项，并在答题卡上将该项涂黑。

Mom was late once again!!“Sorry, honey. I left the office only a little bit late, but the 21 caused really bad traffic, and I…”I hung up. All too often, situations like this happen. Being a teenager is not 22 , and my parents often make me feel less important than their work.In third grade, I broke my arm at school. When the school nurse called my mom, she was too 23 to answer. When the phone call 24 my father, he sighed and said, “I’m in the middle of my research.” I waited in the nurse’s office for hours before my parents finally 25 to take me to hospital.I wished my parents could spare me some time. To make my parents take me seriously, I26 . I tried to establish my own authority (权威) by 27 their schedule. My mom did everything possible to settle the problem, but nothing 28 until she met that adviser.One day after I shut my door in her face, my mom didn’t complain or cry. 29 , she knocked and said, “I have something to tell you.” I opened the door. “Today I met a really good adviser. He said that every time your daughter is angry, she is just saying: I 30 you.”It occurred to me that my anger was merely a mask for me to 31 my loneliness and disappointment. But facing one’s 32 need is the first step towards being happier. This concept not only helped things between my parents and me but also enabled me to handle conflicts and emotions. I started to pay attention to other people’s 33 . When an angry customer approached me at my volunteering job, he was saying, “I need more service.” When a homeles s person shouted to me in a parking lot, he was simply saying, “I need food and help.”I am now able to see 34 the fog of anger and see the real face and heart of other person.Five minutes after I hung up on her, my mom’s car finally appeared th rough the fog. She rolled down her window and said, “Let’s go to a hotpot place, shall we?” I 35 . “OK, but promise me you won’t be late again.”21．A．rain B．snow C．wind D．fog 22．A．easy B．unusual C．awesome D．exciting 23．A．upset B．scared C．nervous D．busy 24．A．reached B．bothered C．alarmed D．woke 25．A．passed by B．drove away C．showed up D．gave in 26．A．chattered B．screamed C．whispered D．apologized 27．A．ignoring B．checking C．following D．completing 28．A．appeared B．mattered C．happened D．worked 29．A．Moreover B．Therefore C．Instead D．Meanwhile 30．A．hate B．need C．believe D．understand 31．A．avoid B．relieve C．show D．cover 32．A．unmet B．urgent C．increasing D．physical 33．A．behavior B．anger C．reaction D．satisfaction 34．A．around B．across C．into D．through 35．A．yelled B．complained C．smiled D．hesitated山东省菏泽市2023-2024学年高二上学期期中英语试题第一节(共15小题；每小题1分, 满分15分)阅读下面短文, 从每题所给的A、B、C、D四个选项中选出可以填入空内处的最佳选项。

河南洛阳市高三上学期期中考试英语试题（含答案解析）本试卷分第I卷（选择题）和第Ⅱ卷（非选择题）两部分，考生作答时，将答案答在答题卡答题卷上。

（答题注意事项见答题卡），在本试卷上答题无效。

考试结束后，将答题卡和答题卷一并交回。

第Ⅰ卷第一部分听力（共两节，满分30分）做题时，先将答案标在试卷上。

录音内容结束后，你将有两分钟的时间将试卷上的答案转涂到答题卡上。

第一节（共5小题；每小题l.5分，满分7.5分）听下面五段对话。

每段对话后有一小题，从题中所给的A、B、C三个选项中选出最佳选项，并在答题卡上将该项涂黑。

听完每段对话后，你都有10秒钟的时间来回答有关小题和阅读下一小题。

每段对话仅读一遍。

1．Whatdotheman’sparentswanthimtobe?A．Adoctor. B．Ateacher. C．Anengineer. 2．Whatwilltheweatherbelikeintheevening?A．Clear. B．Rainy. C．Snowy. 3．Howdidthemanfeelaboutthefilm?A．Helikeditverymuch. B．Hedidn’t likeitatall. C．Helikedthelastpartofit. 4．Whatwillthewomandonext?A．Talktoapoliceofficer.B．Waitforthemantocallback.C．Tellthemanwhathappenedindetail.5．Whatarethespeakerstalkingabout?A．Themakingofarobot.B．Theirhomeinthefuture.C．Howtechnologyhaschangedtheirlives.第二节（共15小题；每小题1.5分，满分22.5分）听下面5段对话或独白。

每段对话或独白后有几个小题，从题中所给的A、B、C三个选项中选出最佳选项，并在答题卡上将该项涂黑。

洛阳市2020—2021学年上学期期中考试英语试卷注意事项：1.答卷前，考生务必将自己的姓名、考号等填写在答题卡和试卷指定位置上。

2.回答选择题时，选出每小题答案后，用铅笔将答题卡上对应题目的答案标号涂黑。

如需改动，用橡皮擦干净后，再选涂其它答案标号。

回答非选择题时将答案写在答题卡上，写在本试卷上无效。

第一部分听力（共两节，满分30分）第二部分阅读理解（共两节，满分40分）第一节（共15小题；每小题2分，满分30分）阅读下列短文，从每题所给的四个选项（A、B、C、和D）中，选出最佳选项。

AThe School’s Community（社区）Service Program encourages all Lawrentians to connect with the greater community,giving them the opportunity to join a variety of people outside the students’present world.Because we want students to have a common service experience that improves their Lawrenceville education and builds community within and beyond the gates,the Community Service graduation requirement is not based on a certain number of hours that a student must complete.Instead,students participate in three different types of community engagement（参与）.wrenceville Community Action Project（LCAP）to be completed in9th,10th or11th grade.LCAP examples include:a one-term weekly project;being an advisor at Lawrenceville School Camp or Performing Arts Camp;or participating in a Harkness Travel Program Service Trip.2.Annual participation in the School’s Martin Luther King All-School Day of Service3.One-time events（All-School,House,club or team sponsored）—1-3times before graduation depending on students’entering year.Students may choose,from over30different weekly projects in the Trenton-Princeton-Lawrenceville area.Typically,students do these projects during the evening or on Sunday afternoons if they are playing a school sport,or on a Wednesday or Friday afternoon if they are involved in House or lifetime athletics.Students also sometimes develop their own weekly projects based on their interests and talents. Past projects which were started by students include on-campus（校园）dance,chess and art programs for children.Under the leadership of the Community Service Representative（CSR）,the Community Service Committee（formed by students who take a leadership role in community service）is responsible for organizing projects and for keeping the Houses informed about community service matters.21.What may an11th grader do to meet graduation requirement?A.Play football on the city team.B.Work as an advisor at Performing Arts Camp.C.Join in Martin Luther King All-school Day weekly.D.Participate in LCAP three times in the fresh year.22.Why does Lawrenceville hold the Community Program?A.To help build students’service experience.B.To help develop students’interest in career.C.To lead students to experience different trips.D.To help students finish the duration of experience.23.Which is in charge of organizing the projects?A.The Student Union.B.The leader of the community.C.The Community Service Committee.D.The Community Service Representative.BA heart-stopping video shows that a group of hikers were able to keep their cool as a curious black bear approached them—and one even stayed composed enough to snap a selfie（自拍）.The black bear pulls one of the women by the leg with its paws（爪子）,moving towards her across the path as she tries to remain completely still.When the frightening animal stands up on its legs to smell her,the fearless walker can he seen taking a photo with the wild animal as it breathes down her neck.The incident is reported to have happened on a path in Chipinque Ecological Park,Mexico, and the clip（剪辑片段）has had millions of views since being shared on social media.With the bear particularly interested in one member of the group,another walker remains frozen with her back to the animal as she stares still into the trees.A third can be seen nervously fearing as the bear begins to approach her and shakes her hand in fear,but it circles back around to check out the first hiker for a second time.It pushes her off balance with its head before twice pawing at her legs as onlookers shout to try and warn the bear off.The woman remains fearless as the animal isn’t into her and continues walking up the path, giving the group an opportunity to make a swift exit.It was shared on Twitter by former basketball player Rex Chapman,getting2.7million views, with the caption:“Oh,my Goodness.She’s a rock.”24.What does the underlined word“composed”mean in the first paragraph?A.Afraid.B.Confused.C.Disappointed.D.Calm.25.When did the woman take a photo with the bear exactly?A.On seeing the black bear.B.On the bear’s pulling her leg.C.On the bear’s smelling her.D.On the bear’s seeing her.26.Why did the bear leave?A.It was frightened.B.It was hungry.C.It got injured.D.It lost interest.27.From which is the text most probably taken?A.A newspaper.B.A health magazine.C.A research report.D.A brochure.CThey give us paper and fuel,as well as vital ecological services—like cleaning the air,storing carbon and providing home.We’re talking about trees,of course.But human changes to the environment appear to be causing great changes to trees around the world.In a new study,scientists reviewed global research on trends in tree seedlings（幼苗）, growth,and death.They combined those data with an analysis deforestation（森林采伐）.And they found worldwide,older trees are dying at a higher rate than in the past,due to reasons like rising air temperature,wildfires,drought（干旱）and pathogens（病菌）.“And most of the drivers of that decrease in large,old trees are increasing themselves,such as temperature going up,droughts are more severe,wildfires,windstorms,and deforestation are all—although variable across the globe—they’re generally increasing.And so both the loss has already occurred,but we expect more continued loss of big,old trees,”said Nate McDowell,an earth scientist at Pacific Northwest.National Lab,who was one of the study’s authors.“So if we have an increasing rate of death,particularly of the larger,older trees,what’s left arethe younger trees.So that’s why on average,through the loss of bigger,older trees,our forests are becoming younger and shorter.This trend is a problem,because old trees are vitally important.”“The increase in death does limit the carbon storage of an ecosystem,and can force the system to become a carbon source to the atmosphere.The second reason is from a biodiversity viewpoint —old trees tend to house a higher biodiversity.And the third reason is linked with beauty:as a society we care about these trees.We have national parks named after these big trees.”Nate McDowell added.28.What’s tie purpose of the author in writing the passage?A.To warn us to care about old trees.B.To call on us to plant more trees.C.To tell us why old trees are dying out.D.To prove forests are becoming smaller.29.Which of the following does Nate McDowell think is a problem?A.There’ll be a larger number of older trees.B.Older trees will disappear in the world.C.Young trees will be cut down by people.D.Trees will become younger and shorter.30.Why are old trees important?A.They are beautiful.B.They can shelter a variety of wildlife.C.National parks have access to them.D.They limit the carbon storage of an ecosystem.31.What may be the best title for the text?A.Temperature Destroys Forests.B.Forests Gets Younger and ShorterC.The Reasons of the Loss of Old TreesD.The Driver of the Decrease of Old TreesDAre you the type to run before breakfast in a morning?Working out on an empty stomach won’t hurt you—and it may actually help,depending on your goal.Exercising before eating comes with the risk of feeling light-headed due to low blood sugar. You might feel tired or uneasy,and won’t be able to work out as enthusiastically as you would have.A light amount of food is important for older adults over55to eat something before exercising—especially in the morning.But if your primary exercise goal is weight loss,exercising on an empty stomach may come with some promising benefits.There’s some research to support the idea that working out in a fasted（禁食的）state can burn more fat than exercising in a fed state.Working out on an empty stomach,however,may also not prove true for everyone.“Some people advocate for fasted exercise,but these people tend to be young and in amazing physical shape,”says Douglas Paddon-Jones,a muscle physiology researcher and a professor of aging and health at the University of Texas Medical Branch.“They have no health problems,and what they’re eating is super-high quality and carefully regulated.”On the other hand,working out in a fasted state without proper planning or professional oversight may run the risk of unhealthy body composition changes.For people who aren’t athletes,fueling up with food before a workout may be the best way to get the most fat-burning benefit.“You don’t want to fill up;you just want to give your body a burst of energy to power your training period.After you exercise,drink some water—but wait60to90 minutes before eating,”says Shivani Sahni,director of the nutrition program at Harvard University’s Instituteh for Aging Research.“You’re trying to take advantage of your promoted metabolic（新陈代谢）rate post-exercise,so if you can go an hour or an hour and a half without eating,you’ll maximize the fat-burning response,”says she.32.Why does the author suggest exercising in a fed state?A.To avoid being light-headed.B.To lower blood sugar.C.To burn more fat.D.To work out energetically.33.Who may tend to practise fasted exercise?A.Older adults.B.Seniors beyond55.C.Professional athletes.D.Good-shaped athletes.34.What’s Shivani Sahni’s suggestion for people after exercising?A.Developing a new lifestyle.B.Finding a fitness instructor.C.Going without food for a time.D.Drinking salty water after exercising.35.Which word best describes the author’s attitude to working out in a fasted state?A.Skeptical.B.Cautious.C.Supportive.D.Subjective.第二节（共5小题；每小题2分，满分10分）根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。