四川省泸县二中2020┄2021届春高2020┄2021届半期考试题
2020-2021学年泸州市泸县二中外国语实验学校高三英语期中试卷及答案解析
2020-2021学年泸州市泸县二中外国语实验学校高三英语期中试卷及答案解析第一部分阅读（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、D四个选项中选出最佳选项AWhat are you waiting for? A new series of movies shown this year can’t be missed. Have you enjoyed them already?Frozen IIFrozen was the highest grossing (票房) animated film ever. In Frozen II Elsa, Anna, Olaf and Krist left off Arendelle to seek thesource of Elsa’s icy magic. Although the millions of children who loved the first film are older now, they might give it a reception.Last ChristmasA festive romantic comedy, Emilia Clarke stars in Last Christmas as Bridget Jonesy , a shop assistant, whose life in London is a mess, and Henry Golding as the eligible bachelor(黄金单身汉)who tidies it up. The film’s director, Paul Feig, and co-writer, Emma Thompson, promise that the film is worth expecting.A Beautiful Day in the NeighborhoodTom Hanks stars in A Beautiful Day in the Neighborhood as the only American celebrity(名人) more famous than he is. As the host of Mister Rogers’ Neighborhood for more than 30 years, Fred Rogers is a legend of pre-school children’s television, which appeals to a large audience.Charlie’s AngelsHollywoodaction movies starring women are rare. But have you seen a movie starred, written and directed by women, too? Charlie’s Angels is one of the first. A reboot (翻拍) of the 1970s TV series, not to mention the two films from 2000 and 2003, the new version is directed by Elizabeth Banks. She also plays Bosley, one of the female detectives who are employed by Charles Townsend to go on global adventures.1. Which moviebecame the most popular cartoon film this year?A. Frozen II.B. Last Christmas.C. A Beautiful Day in the Neighborhood.D. Charlie’s Angels.2. Which character works on a TV station?A. Krist.B. Emilia Clarke.C. Fred Rogers.D. Bosley.3. Which action movie was directed and starred by a woman?A. Frozen II.B. Last Christmas.C. A Beautiful Day in the Neighborhood.D. Charlie’s Angels.BWolves have a certain undeserved reputation: fierce, dangerous, good forhunting down deer and farmers’ livestock. However, wolves have a softer, more social side, one that has been embraced by a heart-warming new initiative.In a bid to save some of Europe’s last wolves, scientists have explored the willingness of these supposedly fierce creatures to help others of their kind. Female wolves, the scientists have discovered, make excellent foster parents to wolf cubs that are not their own. The study, published in Zoo Biology, suggests that captive-bred wolfcubs(幼兽)could be placed with wild wolf families, boosting the wild population.The gray wolf was once the world’s most widely distributed mammal, but it became extinct as a result of widespread habitat destruction and the deliberate killing of wolves suspectedof preying on livestock. Fear and hatred of the wolf have since become culturally rooted, fuelled by myths, fables and stories.In Scandinavia, the gray wolf is endangered, the remaining population found by just five animals. As a result, European wolves are severely inbred and have little geneticvariability（变异性）, making them vulnerable to threats, such as outbreaks of disease that they can’t adapt to quickly. So Inger Scharis and Mats Amundin of Linkoping University, in Sweden, started Europe’s first gray wolf-fostering program. They worked with wolves keptat seven zoos across Scandinavia. Eight wolf cubs between four and six days old were removed from their natural parents and placed with other wolf packs in other zoos. The foster mothers accepted the new cubs placed in their midst.The welfare of the foster cubs and the wolves’ natural behavior were monitored using a system of surveillance cameras. The foster cubs had a similar growth rate as their step siblings in the recipient litter, as well as their biological siblings in the source litter. The foster cubs had a better overall survival rate, with 73% surviving until 33 weeks, than their biological siblings left behind, of which 63% survived. That rate of survival is similar to that seen in wild wolf cubs. Scientists believe that wolves can recognize their young, but this study suggests they can only do so once cubs are somewhere between three to seven weeks of age.If captive-bred cubs can be placed with wild-living families, which already have cubs of a similar age, not only will they have a good chance of survival, but they could help dramatically increase the diversity of the wildpopulation, say the researchers. Just like the wild wolves they would join, these foster cubs would need protection from hunting. Their arrival could help preserve the future of one of nature’s most iconic and polarizing animals.4. What’s the theme of the passage?A. Giving wolf cubs a new lifeB. Foster wolf parents and foster cubsC. The fate of wild wolvesD. Changing diversity of wild wolves5. Which of the following flow chart best demonstrates the relationship between the wolves?A. B.C. D.6. Which of the following statements is true?A. Female wolves are willing to raise wolf cubs of 3 to 7 weeks old.B. Foster cubs are accepted by foster parents and are well bred.C. Man’s hostile attitude towards wolves roots in myths, fables and stories.D. Foster cubs and their biological siblings have similar growth rate and survival rate.7. What’s the purpose of the research?A. To help wolves survive various threatsB. To improve wolves’ habitat and stop deliberate killingC. To save endangered wolves by increasing their populationD. To raise man’s awareness of protecting wolvesCThe prevalence of melanoma (黑素瘤) has been rapidly rising around the world for nearly a century. While some of the increase may be due to better detection, researchers also believe it’s because we’re spending more time outdoors in the sun, vacationing to warmer climates during the winter and using tanning beds. That rise is concerning, since melanoma is the most dangerous kind of skin cancer.Most of us know to cover up and apply sunscreen on hot, sunny days, but when fall arrives, we tend to drop those habits. Experts warn that’s a mistake. Though there’s less need for sun protection after summer ends, exposure to UV rays still adds up.What precautions you should take to defend against melanoma during the cooler months depends on where you are in the world. That’s because the further away you are from the equator, the more UV rays weaken in the winter. “In southern England or Canada, the daily dose of UVA on a clear summer day is 6.5 times higher than on a clear winter day,” says Professor Brian Diffey of the British Association of Dermatologists. “People in those countries typically receive only about 5% of their annual UV exposure in the winter months.”But no matter where you are, even during colder, lower risk months, it’s a mistake to put your sun-protection habits on ice. “It’s important to wear sun-screen when there is a lot of glare from the snow,” says Victoria Mar, director of the Victorian Melanoma Service at Alfred Hospital in Melbourne, Australia.Finally, you should monitor your moles(痣). “Early detection of melanoma is vital for successful treatment,” says Diffey. If it’s caught before it spreads to other parts of the body, the patient will have 99 % of chance to survive for five years. If it’s caught late, that can drop to 25%. Warning signs are a mole that’s changing size, shape or colour, or one that’s asymmetrical — sometimes referred to as “ugly duckling” moles. If you have concerns, talk to your doctor.8. What’s the main cause of the rise ofmelanoma?A. The climate change.B. Better detection.C. More exposure to the sun.D. The increase ofskin cancer.9.What’s a mistake according to experts?A. Applying sunscreen in summer.B. Wearing sun-screen when there is snow.C. Using sunscreen during lower risk months.D. Dropping sun-protection habits in winter.10. What can we learn from the last paragraph?A. Prevention is better than cure.B. Health is better than wealth.C. A disease known is half cured.D. When the sun comes in, the doctor comes out.11. What is the best title of the text?A. Detect Melanoma.B. Beware Winter Rays.C. Monitor Your Moles.D. Spend Less Time Outdoors.DMy friend and I went traveling inTasmania,Australialast December. We settled in our Airbnb accommodation, a cozy apartment, not long after we arrived inHobart, the capital city.After briefing us on the kitchen's facilities and the whereabouts of the bedroom and bathroom, our hostess Geraldine resumed her ironing work, which seemed to have been interrupted by our arrival.She was ironing what looked like security guard uniforms, and we soon found out that she worked in a local prison. And when she detected the curiosity in our tones, she offered a tour at the prison in her SUV. My friend and I exchanged a “this is incredible” look and said “yes” immediately.As we drove, she told us about the buildings that we were passing, the local market and how to get to MONA,Tasmania's well-known contemporary art gallery.And of course we got to hear some background information about the prison. According to our hostess, it currently holds Martin Bryant, a notorious criminal who cheated 35 people out of their property. We could see the high level of security from the layers upon layers of wires surrounding the gray structure inside.Getting to know a city in such a local way is something I would never be able to do by talking to a hotel receptionist, and this is what I like best about the apartment-sharing experience, not to mention the fact that it's usually cheaper than hotel rooms.But I'm fully aware of the risks of Airbnb, which is why I did my homework before booking online—I checked the reviews of the accommodation to avoid possible safety problems.That said, it is the mutual trust between a host and a guest that fascinates me—the interesting feeling of building a bond with a total stranger.12. Why did the hostess drive us to the prison?A. She planned to send the uniform to the prison.B. She found our curiosity about the prison.C. She wanted to show off her SUV.D. She needed to offer a tour for us.13. Which of the following can best explain the word “notorious” in Paragraph 5?A. Unfamiliar to everyone.B. Particularly disappointing.C. Well known for being bad.D. Extremely generous to others.14. Compared with hotels, what is the writer's favorite of the Airbnb accommodation?A. It is cheaper in most cases.B. It supplies a better living condition.C. It offers a much safer accommodation.D. It provides a chance to know local culture.15. What does the author think of finding accommodation on Airbnb?A. Disapproving.B. Supportive.C. Neutral.D. Doubtful.第二节（共5小题；每小题2分，满分10分）阅读下面短文，从短文后的选项中选出可以填入空白处的最佳选项。
四川省泸州市泸县第二中学2020_2021学年高一数学下学期第一次月考试题文
四川省泸州市泸县第二中学2020-2021学年高一数学下学期第一次月考试题 文数学试卷分为第Ⅰ卷（选择题）和第Ⅱ卷（非选择题）两部分，共4页，满分150分。
注意事项：1.答题前，考生务必将自己的姓名、班级、考号填写在答题卷上相应位置。
2.选择题答案使用2B 铅笔填涂在答题卷对应题目号的位置上，填涂在试卷上无效。
3.非选择题答案请使用黑色签字笔填写在答题卷对应题目号的位置上，填写在试卷上无效。
第一部分 （选择题 共60分）一、选择题（本大题共12题，每小题5分，共60分，只有一项是符合题目要求。
） 1．已知}3|{},5,4,2{≥==x x B A ，则=B AA ．}5{B ．}5,4{C ．}5,4,3{D ．}5,4,3,2{ 2．=︒︒+︒︒12sin 72sin 12cos 72cosA ．21-B ．21C ．23-D ．23 3.已知数列}{n a 是等差数列，且1073=+a a ，则=5aA.2B.3C.4D.54.已知扇形弧长是2，面积是4，则扇形的圆心角的弧度数是A.21 B.23 C.25D.4 5．已知ABC Δ中，内角C B A ,,所对的边分别为c b a ,,.若︒===60,2,3A b a ，则=B A ．︒45 B ．︒60 C ．︒45或︒135D ．︒1356．在正方形中，点E 为CD 边的中点，则A ．AD AB AE 21+= B ．AD AB AE 21-= C ．AD AB AE +=21D ．AD AB AE +-=217. 在ABC Δ中，若A c b cos =，则ABC Δ是A. 等边三角形B. 等腰三角形C.直角三角形D. 等腰直角三角形8．为了得到函数⎪⎭⎫ ⎝⎛+=43sin )(πx x f 的图像，需对函数x x g sin )(=的图像所作的变换可以为A ．先将图像上所有的横坐标压缩为原来的31倍，纵坐标不变，再向左平移12π个单位B ．先将图像上所有的横坐标伸长为原来的3倍，纵坐标不变，再向右平移12π个单位 C ．先将图像上所有的横坐标压缩为原来的31倍，纵坐标不变，再向左平移4π个单位D ．先将图像上所有的横坐标伸长为原来的3倍，纵坐标不变，再向右平移4π个单位 9．已知α为锐角，且5522cos =⎪⎭⎫⎝⎛-πα，则=-+ααααcos sin cos 3sin 2 A ．8- B ．7 C ．8± D ．7±10.设)(x f 是定义在R 上的偶函数，且在),0(+∞上单减，则A.⎪⎪⎭⎫ ⎝⎛>⎪⎪⎭⎫ ⎝⎛>⎪⎭⎫ ⎝⎛--322332241log f f f B.⎪⎪⎭⎫ ⎝⎛>⎪⎪⎭⎫⎝⎛>⎪⎭⎫ ⎝⎛--233232241log f f fC.⎪⎭⎫ ⎝⎛>⎪⎪⎭⎫ ⎝⎛>⎪⎪⎭⎫ ⎝⎛--41log 2233223f f f D.⎪⎭⎫ ⎝⎛>⎪⎪⎭⎫ ⎝⎛>⎪⎪⎭⎫⎝⎛--41log 2232332f f f 11．已知函数⎪⎩⎪⎨⎧≥-<<-≤+-=3,230,320,3)(x x x x x x x f ，若数列}{n a 满足())(,411*+∈==N n a f a a n n ，则=2021aA ．1B ．2C ．4D ．1-12.已知定义在R 上的函数)(x f 满足⎪⎭⎫ ⎝⎛-=⎪⎭⎫ ⎝⎛+x f x f 44ππ，且当ππ≤≤x 4时，x x f sin )(=，则当函数a x f x g -=)()(在⎥⎦⎤⎢⎣⎡-ππ,2有零点时，关于其零点之和有以下阐述：①零点之和为4π；②零点之和为2π；③零点之和为43π；④零点之和为π.其中结果有可能成立的是 A.①② B.②③ C.③④ D.②③④第二部分 （非选择题 共90分）二、填空题（本大题共4个小题，每小题5分，共20分。
四川省泸县第二中学2020-2021高一上学期第二次月考试题
四川省泸县第二中学2020—2021学年高一政治上学期第二次月考试题注意事项：1．答题前，考生先将自己的姓名、准考证号码填写清楚，将条形码准确粘贴在条形码区域内. 2．答题时请按要求用笔。
3．请按照题号顺序在答题卡各题目的答题区域内作答,超出答题区域书写的答案无效；在草稿纸、试卷上答题无效。
4．作图可先使用铅笔画出，确定后必须用黑色字迹的签字笔描黑。
5．保持卡面清洁,不要折叠、不要弄破、弄皱,不准使用涂改液、修正带、刮纸刀。
6。
考试时间:150分钟；历史政治地理同堂分卷考试，每科100分，共300分第I卷选择题（60分）一、单选题(每小题4分，共15个小题，共60分）1．2020年7月8日，央行宣布从11月5日起发行第五套人民币5元纸币，其主图案等保持不变，优化了票面结构层次与效果，提升了整体防伪性能。
对新版5元纸币说法正确的是A．发行量过多会引起物价下跌B．能充当商品交换的媒介C．面值和购买力由央行决定D．使用价值和价值的统一体2．“绿色、健康、环保”已成为当今的消费潮流。
在服装市场上,面料健康环保、生产过程无污染、废弃以后能够回收利用的绿色服装呈现出强劲的发展势头，成为热销的服装.绿色服装之所以热销，是因为A．其凝结了较多的体力和脑力劳动 B．其使用价值能够适应消费者的需求C．其具有较高的价值 D．其交换的范围越来越广3．2019年政府工作报告提出，推动“第五代移动通信”产业发展.业内预计2020年全面实现5G商用，5G 商用将会对通信业等经济各领域效率提高、新旧动能转换产生极大的拉动价值。
对此，网友纷纷表示：“好用不贵"才应该是先进技术的关键词。
网友的心声告诉我们A．使用价值的大小决定价格的高低 B．使用价值越高越有利于价值的实现C．商品是使用价值和价值的统一体 D．科技含量的高低决定价值量的大小4．在经济生活中，一种经济现象的出现往往引起另一种经济现象的产生。
在其他条件不变的情况下，图中正确反映这一关系的有A．①②B．③④C．①③D．②④5．一些企业为了创造更好的经济效益，实行互补品战略。
泸县二中高2020┄2021届2020┄2021届春期第1月考卷
泸县二中2021年春期高2022级第一学月考试化学试题（全卷满分100分，考试时间90分钟）注意事项：1. 全卷共8页，分为第I卷（选择题）和第II卷（非选择题）两部分。
2. 第I卷的答案必须填在第5页的选择题答题栏内。
答案不能写在试卷上，否则不给分。
第II卷用铅笔答题不得分。
3. 可能用到的相对原子质量：H---1 C---12 Cl---35.5 He---4第I卷（选择题共50分）一、选择题（每小题只有一个选项符合题意。
第1~10题每小题2分，第11~20题每小题3分，共50分）1、提出元素周期律并绘制了第一张元素周期表的科学家是A．戴维 B．阿伏加德罗 C．门捷列夫 D．道尔顿2、元素性质呈周期性变化的原因是A．相对原子质量逐渐增大 B．核电荷数逐渐增大C．核外电子排布呈周期性的变化 D．元素化合价呈周期性的变化3、下列各组粒子中属于同位素的是A． 24Mg和24Na B．H2O和D2O C．H2和D2 D．氘和氚4、下列物质的电子式书写正确的是5、某粒子用符号A z M n表示，下列关于该粒子的叙述中，正确的是A．所含质子数为 A—n B．中子数—电子数=A—2Z＋nC．所含电子数为 Z＋n D．所含中子数为 A—Z—n6、下列说法正确的是A．含有共价键的化合物必是共价化合物B．阴、阳离子间通过静电引力所形成的化学键是离子键C．化学变化过程，一定会破坏旧的化学键，同时形成新的化学键D．共价化合物可能含有离子键7、短周期元素X、Y、Z在周期表中的位置如图所示，则下列说法正确的是A．1molX单质含有4mol电子B．Y的最高价氧化物的水化物是一种强酸C．Z的氢化物比Y的氢化物稳定D．1 molY单质跟足量水反应时，有2 mol电子发生转移8、下列各表中的数字代表的是元素的原子序数。
表中数字所对应的元素与它们在周期表中的位置相符的是Xyz9、运用元素周期表和元素周期律，下列推断中不正确的是A．砹单质是一种有色固体，砹的气态氢化物很不稳定B．在周期表中金属和非金属元素的分界线附近可以寻找制取新农药的元素C．铷的硫酸盐易溶解于水，其氢氧化物一定是强碱D．溴化氢没有氯化氢稳定10、电子数相等的粒子叫等电子体，下列粒子不属于等电子体的是A．NO和O2 B．HCl和H2SC．CH4和NH4+ D．NH2—和H3O+11、A、B、C均为短周期元素，它们在周期表中的位置如下图。
四川省泸县第二中学2020-2021高一上学期第二次月考试题
四川省泸县第二中学2020—2021学年高一历史上学期第二次月考试题注意事项：1．答题前,考生先将自己的姓名、准考证号码填写清楚，将条形码准确粘贴在条形码区域内。
2．答题时请按要求用笔。
3．请按照题号顺序在答题卡各题目的答题区域内作答，超出答题区域书写的答案无效；在草稿纸、试卷上答题无效。
4．作图可先使用铅笔画出，确定后必须用黑色字迹的签字笔描黑。
5．保持卡面清洁，不要折叠、不要弄破、弄皱，不准使用涂改液、修正带、刮纸刀.6.考试时间：150分钟；历史政治地理同堂分卷考试，每科100分，共300分第I卷选择题（60分)一、单选题（每小题4分，共15个小题，共60分）1．商朝各附属国基本保持原有的社会结构，有很大的自主权，商王事实上是内外服联盟的首领。
周朝各诸侯国必须承认周王的权威，并承担各种义务，周王确立了天下共主的地位。
由此可知A．周天子对地方控制加强B．王位世袭制的完善C．中央集权制度逐渐确立D．贵族政治正式形成2．许倬云在《西周史》中提到：“西周的城邑，是金字塔形的层级结构。
宗周成周是定点的大邑,诸侯的国是次级的邑，国以下有贰宗大都，有卿大夫的家邑,最下层则是直接控制田野的邑."这种“层级结构”A．主要以血缘关系为纽带进行构建 B．是古代官僚政治建立的重要标志C．促使周的文化形式覆盖整个长江流域 D．实现了最高执政集团权力的高度集中3．公元前220年起，秦朝陆续修建了以咸阳为中心的三条驰道：一条向东直通过去的燕、齐地区；一条向南直达吴、楚地区;一条从咸阳直达九原的直道。
驰道宽50步，车轨宽6尺。
道旁每隔三丈栽树一株.驰道的修建A．促使国家从分裂走向统一B．有利于各地经济文化交流C．削弱了中央对地方的控制D．导致统治集团的腐朽4．咸阳是秦朝国都所在地，不设郡守而由朝廷直辖，其长官为内史。
内史位同九卿，可以参与朝政，由此可以推知A．内史是秦朝高级教育官员B．内史拥有特殊的地位C．秦朝皇帝任免各级官吏D．秦朝重视地方治理5．节度使是唐代开始设立的地方军政长官.节度，意为节制调度，最初为临时委派的行军总管;唐高宗、武后时期，为了加强边疆防御力量和改变临时征调的困难，行军总管开始演变成地方大军区军事长官.节度使设置的变化A．目的是增强边疆地区的军事力量B．阻碍了唐王朝的进步与发展C．促进了唐王朝长治久安D．大大加强了中央集权6．武则天时期，将中书、门下二省名称分别改为凤阁、鸾台,通过加授“同凤阁鸾台平章事”头衔，使低品阶官员得以与凤阁、鸾台长官共同议政.宰相数量大增，且更替频繁。
高一英语下学期期中试题_1 15
2021年春季学期泸县二中高一半期考试英语试题本试题分第一卷〔选择题〕和第二卷〔非选择题〕在在考试完毕之后以后，将本套试卷和答题卡一起交回。
第I卷〔选择题 100分〕考前须知：1. 答第一卷前，所有考生必须将本人的姓名、考生号填写上在答题卡上。
2. 选出每一小题答案后，用铅笔把答题卡上对应题目之答案标号涂黑。
如需改动，用橡皮擦干净后，再选涂其他答案标号。
不能答在套本套试卷上，否那么无效。
第一局部听力〔一共两节，满分是30分〕做题时，先将答案标在试卷上。
录音内容完毕以后，你将有两分钟的时间是将在试卷上之答案转涂到答题卡上。
第一节〔一共5小题；每一小题1.5分，满分是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三个选项里面选出最正确选项，并标在试卷的相应位置。
听完每段对话后，你都有10称钟的时间是来答复有关小题如阅读下一小题。
每段对话仅读一遍。
例：How much is the shirt?A. ￡19.15.B. ￡9.18. C￡9.15.答案是 C。
1.Why is the girl in the classroom?A. To take a class.B. To see Mrs. MillerC. To get her textbooks.2. What time does the woman get off work?A. Before 6:30 p.m.B. At 7:00 p.m.C. After 7:00 p.m. 3．What do we know about the woman’s sister?A. She’s four year s old.B. She’s in high schoolC. She’s older than the woman.4. What does Ted need to do?A．Clean the living room. B．Wash the dishes. C．Take the trash out.5．Why does the girl come to school in an old car?A．The old car works well. B．She can’t afford a new car.C．The new car is being used by her father.第二节〔一共15小题：每一小题1.5分，满分是22.5分〕听下面5段对话或者独白。
四川省泸县第二中学20212021学年高二数学下学期期中试题文
2021年春期四川省泸县二中高二年级半期考试数学（文科）第Ⅰ卷（选择题，共60分）一、选择题：本大题共12个小题，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．复数=+=iiz 25（ ） A ．i B ．i +1 C ．i 21+ D ．i -1 2．点M 的直角坐标为)2,32(-化为极坐标为（ ） A ．)611,4(π B ．)35,4(π C ．)65,4(π D ．)32,4(π3．化极坐标方程02sin 22=-ρθρ为直角坐标方程为（ ）A ．x 2+y 2=0或y=1B ．x=1C ．x 2+y 2=0或x=1D ．y=14.函数f (x )＝ln(5＋4x －x 2)的单调递减区间是( )A.(]2,∞-B.[)+∞,2C.(]2,1-D.[)4,25.点(1,2-a a )在圆22240x y y +--=的内部，则a 的取值范围( ) A ．－1<a <1 B ． 0<a <1 C ．–1<a <51 D ．－51<a <1 6．f (x )是概念在R 上的以3为周期的偶函数，且f (2)＝0，则方程f (x )＝0在区间(0,6)内解的个数至少是( )A ．5B ．4C ．3D ．27.直线y x b =+与抛物线22x y =交于A 、B 两点，O 为坐标原点，且OA OB ⊥，则b =（ ）.2A .2B - .1C .1D -8.若直线l 过点(3,0)与双曲线224936x y -=只有一个公共点，则这样的直线有（ ）A.1条B.2条C.3条D.4条9.若不论k 为何值，直线(2)y k x b =-+与曲线221x y -=总有公共点，则b 的取值范围是（ ）A.(B.⎡⎣C.(2,2)-D.[]2,2-10．一个球与一个正三棱柱的三个侧面和两个底面均相切，已知这个球的体积是323π，那么这个三棱柱的体积是( )A. 11.已知直线0634:1=+-y x l 和直线1:2-=x l ，抛物线x y 42=上一动点P 到直线1l 和直线2l 的距离之和的最小值是（ ） A ．1637 B ．3 C.511D ．2 12．概念在R 上的函数()f x 的导函数'()f x 无零点，且对任意x ∈R 都有3(())2f f x x +=，若函数()()g x f x kx =-在[11]-，上与函数()f x 具有相同的单调性，则k 的取值范围是（ ） A ．[0)+∞， B ．(3]-∞-， C.(0]-∞， D ．[3)-+∞，第Ⅱ卷（90分）二.填空题（本大题共4小题，每题5分，满分20分） 13.动圆过点1,0，且与直线1x 相切，则动圆的圆心的轨迹方程为____________.14.函数xx x f 2ln )(+=在1=x 处的切线方程为____________. 15.已知函数()32f x x ax bx c =+++在23x =-与1x =时都取得极值，若对[]1,2x ∈-，不等式()2f x c <恒成立，则c 的取值范围为______。
2020-2021学年四川省泸州市泸县第二中学高二上学期期中考试数学(文)试题 Word版
泸州市泸县第二中学2020-2021学年高二上学期期中考试文科数学试题数学试卷分为第Ⅰ卷（选择题）和第Ⅱ卷（非选择题）两部分，共4页，满分150分.注意事项：1.答题前，考生务必将自己的姓名、班级、考号填写在答题卷上相应位置.2.选择题答案使用2B 铅笔填涂在答题卷对应题目号的位置上，填涂在试卷上无效.3.非选择题答案请使用黑色签字笔填写在答题卷对应题目号的位置上，填写在试卷上无效.第一部分 （选择题 共60分）一、选择题（本大题共12题，每小题5分，共60分，只有一项是符合题目要求.） 1.直线0132=++y x 在x 轴上的截距为A.21 B.21- C.31 D.31- 2.命题“02021),,0(x x x ≤++∞∈∃”的否定为 A ．x x x 21),,0(2>++∞∈∀ B ．x x x 21),,0(2≤++∞∈∀C ．x x x 21),0,(2≤+-∞∈∀D ．x x x 21],0,(2>+-∞∈∀ 3.已知直线经过点)4,0(A 和点)2,1(B ，则直线AB 的斜率为A ．3B ．2-C ．2D ．不存在4.已知圆25)4()1(:221=+++y x C 和圆25)4()5(:222=-+-y x C ，则圆1C 与圆2C 的位置关系为A ．外切B ．内切C ．相交D ．外离 5.已知中心在原点的椭圆C 的右焦点为)0,1(F ，离心率等于21，则C 的方程是 A ．14322=+y x B ．13422=+y x C ．12422=+y x D ．13422=+y x 6．已知直线)(02:R k y kx l ∈=-+是圆0626:22=++-+y x y x C 的一条对称轴，过点),0(k A 作圆C 的一条切线，切点为B ，则线段AB 的长度为A ．2B ．22C ．3D ．327.22≤a 是关于x 的不等式022≥+-ax x 在),2[+∞恒成立的A.充分不必要条件B.必要不充分条件C.充要条件D.既不充分也不必要条件 8.)2,1(P 到直线02:=-++a ay x l 的距离最大值为A ．10B ．4C ．23D ．11 9.直线)0,(01>=++b a by ax 过点)1,1(--，则ba 41+的最小值为A ．10B ．1C ．4D ．910.已知21,F F 分别是椭圆)3(19:222>=+a y ax C 的左、右焦点，P 为椭圆C 上一点，且︒=∠9021PF F ，则=⋅21PF PFA.8B.9C.16D.18 11.在三棱柱111C B A ABC -,⊥1AA 面ABC ，32π=∠BAC ，41=AA ，32==AC AB ，则三棱柱111C B A ABC -的外接球的表面积为A ．π32B ．π48C ．π64D ．π7212.关于曲线1323:22=++y xy x C 有以下阐述：①关于x 轴对称；②关于y 轴对称；③关于原点对称；④若),(y x P 是曲线C 上任一点，则y 的所有取值构成的集合为{}11|≤≤-y y .其中正确的说法有A.①B.③C.①②D.③④第二部分 （非选择题 共90分）二、填空题（本大题共4个小题，每小题5分，共20分.把答案填在答题纸的相应位置上.） 13.若关于x 的不等式022>++bx ax 的解集是⎭⎬⎫⎩⎨⎧<<-3121x x ，则=+b a . 14.已知点)3,6(),4,3(B A --到直线01:=++y ax l 的距离相等，则=a .15.直线3)2(+-=x k y 与曲线24x y -=有两个公共点，则实数的k 的取值范围是 . 16.如图所示，在正方体1111D C B A ABCD -中，点M 是棱CD 的中点，动点N 在体对角线C A 1上（点N 与点1A ，C 不重合），则平面AMN 可能经过该正方体的顶点是 .（写出满足条件的除A 点以外的所有顶点）三、解答题（本大题共6个小题，共70分.解答应写出必要的文字说明，证明过程或演算步骤.） 17.(本小题10分)已知两条直线0655:1=++my x l ，0215)2(:2=++-m y x m l ． （1）当m 为何值时，1l 与2l 垂直； （2）当m 为何值时，1l 与2l 平行．18．(本小题12分)一个正方体的平面展开图及该正方体的直观图的示意图如图所示，在正方体中，设BC 的中点为M ,GH 的中点为N .（1）请将字母H G F ,,标记在正方体相应的顶点处（不需说明理由）； （2）求直线MN 与直线BD 夹角的正切值.19．(本小题12分)已知圆C 过点)3,5(),1,3(B A ，圆心在直线x y =上. （1）求圆C 的标准方程；（2）点P 是圆03512:221=+-+x y x O 上任一点，求三角形PAB 面积的取值范围.20.(本小题12分)某工厂的研发部门尝试用B A ,两种配件生产甲、乙两种产品.实验发现每生产一件甲产品使用4个A 配件耗时1h ，每生产一件乙产品使用4个B 配件耗时2h.该工厂每天最多可从配件厂获得18个A 配件和12个B 配件，每天工作按8h 计算.（1）列举其中六种该工厂的日生产安排；（2）据市场信息反馈生产一件甲产品获利200元，生产一件乙产品获利300元.如果该工厂能从甲、乙两种产品上日获利超过1300元，则决定生产这两种产品，否则放弃.问该工厂最终会不会生产这两种产品.21.(本小题12分)在三棱柱111C B A ABC -中，已知4,51====BC AA AC AB ，点1A 在底面ABC 的射影是线段BC 的中点O ．E 点为线段1AA 上的一个动点. （1）若⊥OE 平面C C BB 11，则求出OE 的长； （2）求四面体C B A C 111的体积．22.(本小题12分)若椭圆1:2122121=+b y a x E 和椭圆1:2222222=+b y a x E 满足)0(1212>==m m b b a a ，则这两个椭圆相似，m 称为其相似比.（1）求经过点)6,2(，且与椭圆12422=+y x 相似的椭圆方程；（2）设过原点的一条射线l 分别与（1）中两个椭圆交于B A ,两点（其中点A 在线段OB 上），求||||OB OA ⋅的取值范围.泸县二中高2019级2020年秋期半期考试文科数学答案一、选择题 1 2 3 4 5 6 7 8 9 10 11 12 BABADCAADDCB二、填空题13. 14- 14.97-或31- 15.⎥⎦⎤⎝⎛43,125 16.1B ,1C 解：（1）由0155)2(5=⨯+-m m 解得81=m ，从而81=m 时1l 与2l 垂直...............(5分) （2）由6251552mm m ≠=-解得5=m ，从而5=m 时1l 与2l 平行....................(10分) 18.（1）如图所示(每点2分)（2）假定正方体边长为1.取DC 的中点，记为K ，连接MN KN KM ,,,因为KM BD //,故KMN ∠或其补角为所求角.在KMNΔ中，2,1,90==︒=∠KM KN NKM ,因此2tan =∠KMN ...........................................................(12分)19.解：（1）由题意设圆心为),(a a C ，半径为r ，则圆标准方程为222)()(r a y a x =-+-(2分)由题意得⎩⎨⎧=-+-=-+-222222)3()5()1()3(r a a r a a ，解得⎩⎨⎧==432r a ...................................(5分) 所以圆C 的标准方程为4)3()3(22=-+-y x ....................................(6分) （2）由题意知道，圆1O 的圆心为)0,6(，半径1=r ， 又ABC Δ的边AB 所在直线方程为353131--=--x y ，即02=--y x 所以点1O 到直线AB 的距离为22=d ，......................................(8分)设三角形PAB 的边AB 上的高为h ，则11+≤≤-d h d ，即122122+≤≤-h ........(9分)又22)31()53(||22=-+-=AB ，所以三角形PAB 的面积[]24,24||21+-∈⋅=h AB S ...........................(12分) 20.解：（1）生产0件甲产品，0件乙产品；生产0件甲产品，1件乙产品； 生产0件甲产品，2件乙产品；生产0件甲产品，3件乙产品；生产1件甲产品，0件乙产品；生产1件甲产品，1件乙产品.(每种情形得1分)（2）法一：发现日生产4件甲产品，2件乙产品时符合条件的要求，此时获利1400元，超过了1300元，因此该工厂会生产这两种产品...................................(12分)法二：假定该工厂日生产x 件甲产品，y 件乙产品，则有⎪⎪⎩⎪⎪⎨⎧≤+≤≤≥≥821241840,0y x y x y x ，利润y x z 300200+=.注意到Z y x ∈,，得到当2,4==y x 时，13001400max >=z .故该工厂会生产这两种产品(12分)21.解：（1）因为OE ⊥平面11BB C C ,故1BB OE ⊥,结合11//BB AA 得到1AA OE ⊥.连接AO ，对于1ΔAOA ,由已知条件并结合简单运算有如下信息：︒=∠==90,1,511AOA AO AA在1ΔAOA 中利用等面积法易得552=OE ....................................(4分) （2）由题可知BC AO ⊥,又O 为BC 中点且AC AB =，故⊥BC 面1AOA .因此1AA BC ⊥,进而11,CC BC BB BC ⊥⊥,即平行四边形C C BB 11是矩形............(7分)在计算三棱锥C B A C 111-的体积时，取1A 为顶点进行计算，这样易得1A 到面C C B 11的距离为552=OE .因此，345525231111111=⨯⨯==--C C B A C B A C V V .................(12分) 22.解：（1）假定所求的椭圆方程为12222=+b y a x ，则有⎪⎪⎩⎪⎪⎨⎧=+=1642222b ab a ，解得⎩⎨⎧==81622b a ，所以所求的椭圆方程为181622=+y x ..................................................(4分) (2)当射线与y 轴重合时，22,2||==OB OA ,此时4||||=⋅OB OA .................(6分) 当射线不与y 轴重合时，由于对称性，仅考虑第一象限的情形.假定射线的方程为)0,0(>≥=x k kx y ，设),(),,(2211y x B y x A ，则有由⎪⎩⎪⎨⎧=+=12422y x kx y ，解得⎪⎪⎩⎪⎪⎨⎧+=+=2221221214214k k y k x ，222112||k k OA ++=.同理222114||k k OB ++=...........(9分) 则]8,4(214421)1(8||||222∈++=++=⋅k k k OB OA .综上]8,4[||||∈⋅OB OA .................(12分)。
四川省泸县第二中学2020-2021学年高二下学期期中考试英语试题
四川省泸县第二中学2020-2021学年高二下学期期中考试英语试题学校:___________姓名：___________班级：___________考号：___________一、阅读选择California has lost half its big trees since the 1930s, according to a study to be published Tuesday and climate change seems to be a major factor（因素）.The number of trees larger than two feet across has declined by 50 percent on more than 46, 000 square miles of California forests, the new study finds. No area was spared or unaffected, from the foggy northern coast to the Sierra Nevada Mountains to the San Gabriels above Los Angeles. In the Sierra high country, the number of big trees has fallen by more than 55 percent; in parts of southern California the decline was nearly 75 percent.Many factors contributed to the decline, said Patrick Mclntyre, an ecologist who was the lead author of the study. Woodcutters targeted big trees. Housing development pushed into the woods. Aggressive wildfire control has left California forests crowded with small trees that compete with big trees for resources（资源）.But in comparing a study of California forests done in the 1920s and 1930s with another one between 2001 and 2010, Mclntyre and his colleagues documented a widespread death of big trees that was evident even in wildlands protected from woodcutting or development.The loss of big trees was greatest in areas where trees had suffered the greatest water shortage. The researchers figured out water stress with a computer model that calculated how much water trees were getting in comparison with how much they needed, taking into account such things as rainfall, air temperature, dampness of soil, and the timing of snowmelt（融雪）.Since the 1930s, Mclntyre said, the biggest factors driving up water stress in the state have been rising temperatures, which cause trees to lose more water to the air, and earlier snowmelt, which reduces the water supply available to trees during the dry season.1．What is the second paragraph mainly about?A．The seriousness of big-tree loss in California.B．The increasing variety of California big trees.C．The distribution of big trees in California forests.D．The influence of farming on big trees in California.2．Which of the following is well-intentioned（出于好心的）but may be bad for big trees?A．Ecological studies of forests. B．Banning woodcutting.C．Limiting housing development. D．Fire control measures.3．What is a major cause of the water shortage according to Mclntyre?A．Not enough snowmelt. B．A longer dry season.C．A warmer climate. D．Dampness of the air.On 7, August, 2015, astronauts aboard the International Space Station (ISS) got to eat a special treat. No, it wasn’t a cookie or cake. It was red lettuce they had grown themselves in space.“It was one small bite for man, one giant leap for NASA VEGGIE,” astronaut Scott Kelly wrote on Twitter. (Kelly based his tweet on the words astronaut Neil Armstrong famously used in 1969, after becoming the first person to ever walk on the moon. “That’s one small step for man, one giant leap for mankind,” he said at the time.)“NASA VEGGIE” refers to the ISS’s Veggie plant-growth system. It uses special red, blue, and green LED lights to grow plants. The system is a big step toward NASA’s goal of developing a way to grow food in space during future long space missions deep into the solar system.Kelly and fellow NASA astronaut Kjell Lindgren prepared the red romaine lettuce like many people do on Earth. They cleaned it, and then mixed it with olive oil and vinegar. Then they gobbled up the leafy red greens. “That’s awesome!” Lindgren said after taking a bite.It was the first taste of fresh food the astronauts had had in a long time, since there is no refrigeration on the ISS. They ate half the lettuce. The rest was packaged and frozen so that it could be returned to Earth for testing.Lindgren and Kelly are the only two NASA astronauts currently on the space station. The other crew members are Russian astronauts Gennady Padalka, Mikhail Komienko, and Lleg Kononenko, and Japanese astronaut Kimiya Yui.Kelly and Kornienko have been on the ISS since March. They plan to spend 342 days in space, in part to help determine the effects of long-term space travel on astronauts’ bodies. They traveled to the ISS with Padalka, who will return to Earth in September.Kelly and Komiendo’s job — which will be one of the longest-ever stay in space by astronauts — will help pave the way for future long-term space tasks. NASA plans to send humans to an asteroid by 2025 and to Mars by the 2030s.4．Why is growing food in space very important?A．It is a symbol of scientific development.B．It will help solve the hunger problemC．Astronauts can get enough nutritious food.D．People plan to go into the deep space.5．What Kelly said in Para. 2 suggests that _____.A．it is a great success to grow fresh food in spaceB．he respected Neil Armstrong very muchC．mankind makes great progress in exploring spaceD．humans should speed up to land on Mars6．Who will remain in the ISS until March, 2016?A．Padalka and Kononenko. B．Yui and Lindgren.C．Kelly and Kormienko. D．Kelly and Lindgren.7．What is the main idea of the passage?A．Astronauts grow their favorite food in space.B．Astronauts get more fresh food from space.C．Astronauts plant vegetables for a journey to Mars.D．Astronauts eat fresh food grown on the ISS.You probably know who Marie Curie was, but you may not have heard of Rachel Carson. Of the outstanding ladies listed below, who do you think was the most important woman of the past 100 years?Jane Addams(1860-1935)Anyone who has ever been helped by a social worker has Jane Addams to thank. Addams helped the poor and worked for peace. She encouraged a sense of community(社区)by creating shelters and promoting education and services for people in need. In 1931,Addams became the first American woman to win the Nobel Peace Prize.Rachel Carson(1907-1964)If it weren’t for Rachel Carson, the environmental movement might not exist today. Her popular 1962 book Silent Spring raised awareness of the dangers of pollution and the harmful effects of chemicals on humans and on the world’s lakes and oceans.Sandra Day O’Connor(1930-present)When Sandra Day O’Connor finished third in her class at Stanford Law School, in 1952,she could not find work at a law firm because she was a woman. She became an Arizona state senator(参议员) and ,in 1981, the first woman to join the U.S. Supreme Court. O’Connor gave the deciding vote in many important cases during her 24 years on the top court.Rosa Parks(1913-2005)On December 1,1955,in Montgomery, Alabama, Rosa Parks would not give up her seat on a bus to a white passenger. Her simple act landed Parks in prison. But it also set off the Montgomery bus boycott. It lasted for more than a year, and kicked off the civil-rights movement. “The only tired I was, was tired of giving in,” said Parks.8．What is Jane Addams noted for in history?A．Her social work.B．Her teaching skills.C．Her efforts to win a prize.D．Her community background.9．What is the reason for O‟Connor‟s being rejected by the law firm?A．Her lack of proper training in law.B．Her little work experience in court.C．The discrimination against women.D．The poor financial conditions.10．Who made a great contribution to the civil-rights movement in the U.S.?A．Jane Addams. B．Rachel Carson.C．Sandra Day O’Connor.D．Rosa Park.11．What can we infer about the women mentioned in the text?A．They are highly educated. B．They are truly creative.C．They are pioneers. D．They are peace-lovers.Lots of people like a good fright at Halloween. Yet, the most frightening thing of all about the night is that twice as many children are killed while out and about on Hallween compared to any other day of the year, according to a study by Safe Kids Worldwide. It can also be a worrying time for others, especially elderly people living alone. Bu many people think it’s just harmless fun.But is it harmless fun?Police forces across Britain are giving warnings about Halloween night. They are asking all those wishing to celebrate Halloween this year to respect those who don’t want to join in.Some forces, like West Mercia Police, have produced “Sorry, No Trick or Treat” posters which can be downloaded from their website, and put up in windows. They want people to send them to the old or anyone who may be frightened by ghosts(鬼)knocking on their doors.A spokesman said: “Children should not call on houses where the posters are put up, neither should they call on strangers, as this can put young people at risk and also make some house owners anxious, especially those who are elderly or living alone.”The police want all trick or treaters to remember that disturbing other people or throwing objects at their homes or cars are all criminal offences(刑事罪). “What may start off as a bit of fun could end up with someone getting a criminal record,” they warn. “Parents may want to consider hav ing a Halloween party at home, instead.”Kent Police are warning young people never to go into the home of someone they don’t know----and to remember not to frighten people.Warwickshire Police are also warning that tricks may seem like harmless fun but can cause trouble to others. They say behaviour such as throwing eggs can quickly cross the line between being anti-social and causing criminal damage. This can result in fines of ￡2,500 for small offences.12．What has the study made by Safe Kids Worldwide found?A．Halloween brings people no fun B．Halloween night puts some kids at risk C．kids are involved in criminal offences D．kids are afraid of Halloween 13．Why are British police forces making efforts to?A．Control anti-social behaviours B．Put an end to trick or treatC．Make Halloween safe and trouble-free D．Punish those who frighten others 14．Why are the “Sorry, No Trick or Treat” posters designed?A．To express disagreement with Halloween B．To ask people to respect the elderly C．To warn little kids to behave themselves D．To make some people free from harm 15．Which of the following things is encouraged by the police during Halloween? A．Having a Halloween party at home B．Inviting the elderly to join in the celebrationC．Going trick or treating from door to door D．Giving strangers a good fright二、七选五If you are already making the time to exercise, it is good indeed! With such busy lives, it can be hard to try and find the time to work out. 16．Working out in the morning provides additional benefits beyond being physically fit.Your productivity is improved. Exercising makes you more awake and ready to handle whatever is ahead of you for the day. 17．Your metabolism(新陈代谢) gets a head start. 18．If you work out in the mornings, then you will be getting the calorie(卡路里) burning benefits for the whole day, not in your sleep.19．Studies found that people who woke up early for exercise slept better than those who exercised in the evening. Exercise energizes you, so it is more difficult to relax and have a peaceful sleep when you are very excited.20．If you work out bright and early in the morning, you will be more likely to stick to healthy food choices throughout the day. Who would want to ruin their good workout by eating junk food? You will want to continue to focus on positive choices.There are a lot of benefits to working out, especially in the mornings. Set your alarm clock an hour early and push yourself to work out! You will feel energized all day long.A．You will stick to your diet.B．Your quality of sleep improves.C．You prefer healthy food to fast food.D．There is no reason you should exercise in the morning.E.You can keep your head clear for 4-10 hours after exercise.F.After you exercise, you continue to burn calories throughout the day.G.If you are planning to do exercise regularly, or you’re doing it now, then listen up!三、完形填空For years, I followed the materialistic standards around me. I thought that without the purses, shoes, and all the other “21 ” things, I would not be as pretty, smart, or important as others of my age.As a freshman (新生) of my high school, I thought top social status could be gained by doing everything to 22 . So I became a(n) 23 and bought fake (伪造的) designer purses. I felt popular and important, and I 24 it.But, my parents couldn’t understand my strong 25 to be someone just to 26others. They tried endlessly to convince me that I was hurting myself, 27 I wouldn’t listen. I felt 28 with this way of my life until one day I looked at myself in the mirror and saw someone with makeup and the product-filled hair wasn’t me. That person was29 .So I quit cheerleading and 30 swimming again, something I had loved for eight years before high school. I also attended my school’s top vocal (声乐) performance group, and31 myself whole-heartedly to community service.I wrote articles in my school newspaper that questioned the materialistic 32 of many students at my school. I started 33 my limits academically, which I 34 considered less important than improving my social status.I found a new group of friends who 35 me, unlike my old friends. I found I no longer needed to impress others materialistically. Starting over was 36 . My classmates looked at me as if they didn’t know me.I am to 37 the materialistic culture. I am confident, talented, and optimistic. I know who I am. I’m motivated to exp lore even more of my 38 as a student and a member of my community.I took one of the worst 39 in my life but I turned it around and 40 something beautiful——a life that fits me, with meaning and happiness.21．A．strange B．necessary C．conventional D．stupid22．A．fit in B．come back C．get out D．set off23．A．assistant B．winner C．actress D．cheerleader24．A．disliked B．loved C．improved D．adopted25．A．promise B．refusal C．desire D．failure26．A．hide B．admire C．impress D．appreciate27．A．so B．but C．until D．because28．A．pleased B．tired C．confused D．bored29．A．happy B．busy C．attractive D．sad30．A．started B．suggested C．regretted D．a voided31．A．forgave B．admitted C．devoted D．collected32．A．doubts B．systems C．reforms D．behaviors33．A．pushing B．clarifying C．finishing D．remembering 34．A．permanently B．finally C．immediately D．previously35．A．protected B．supported C．discovered D．blamed 36．A．natural B．simple C．hard D．special37．A．team up with B．make up for C．take advantage of D．say goodbye to 38．A．history B．belief C．potential D．experience39．A．situations B．changes C．remarks D．decorations40．A．tested B．created C．taught D．affected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As an old English saying goes，“Honesty is the best policy.” It is more than an old cliche(陈词滥调)，but 41．good way to live your life.First，honesty is the 42．(easy) choice that we can make.When people get caught in lies，it always costs them something.Many relationships are destroyed by lies.Second，honesty gives us much 43．(free). Many people believe that being honest limits them in life，but that is not true.Sooner or later those dishonest people 44．(pay) a price for their acts；on the contrary，when we are honest，we are 45．(true) free.If there were two people 46．(stand) before you，a person with a record of being honest and a person 47．is known to be dishonest，who would you be more likely 48．(believe)？I'm sure most people would side with the honest person. 49．we live in the truth or we live in lies.Truth sets us free and lies leave us in nothing but more troubles.Honesty is a choice that we make each day.The choice is 50．(you)．What will you choose?五、短文改错51．文中共有10处语言错误。
2020-2021学年四川省泸县第二中学高三英语期中考试试卷及参考答案
2020-2021学年四川省泸县第二中学高三英语期中考试试卷及参考答案第一部分阅读（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、D四个选项中选出最佳选项AIn the age of social distancing, using robots for some health care interactions is a promising way to reduce in-person contact between health care workers and sick patients. However, a key question is how patients will react to a robot entering the room. Researchers from MIT and Brigham and Women’s Hospital recently set out to answer that question.In a study, the team found that a large majority of patients reported that interacting with a health care provider through a video screen fixed on a robot was similar to an in-person interaction with a health care worker.“We’re working on robots that can help provide care to ensure the safety of the patient and the health care workforce. The results of this study give us some confidence that people are ready and willing to join us. In a larger online survey carried out nationwide, we also found that a majority of respondents were open to having robots perform small tasks such as taking a nose swab (拭子).” says Giovanni Traverso, an MIT assistant professor and the senior author of the study.After the COVID-19 pandemic began early last year, Traverso and his colleagues turned their attention toward new strategies to reduce interactions between potentially sick patients and health care workers. To that end, they created a mobile robot that could interact with patients as they waited in the emergency department. The robots were equipped with sensors that allow them to measure vital signs, including skin temperature, breathing rate, and pulse(脉搏) rate. The robots also carried an iPad for remote video communication with a health care provider.The study suggests that it could be worthwhile to develop robots that can perform tasks that currently require a lot of human effort, such as turning a patient over in bed. These days, turning COVID-19 patients onto their stomachs requires several people. Doing Covid-19 tests is another task that takes a lot of time and effort from health care workers, who could be arranged for other tasks if robots could help.1. Why did the researchers from MIT and BWH carry out the studies?A. To shorten the social distance between doctors and patients.B. To figure out the response of patients to robotic doctors.C. To reduce the risk of being infected with coronavirus.D. To ensure the safety of patients during the pandemic.2. What could be learned from the study?A. Robots are not welcomed by patients.B. Robots will soon replace doctors.C. Robots may help to deal with Covid-19 patients.D. Robots can operate on different patients.3. Which of the following is the best title for the text?A. StrengthsAnd Weaknesses In Robot CareB. The Robotic Doctor Will See You NowC. The Robots Speed Up COVID-19 TestingD. The Development Of Robots In HospitalsBTrue friend from a distant landInternational friends can come in many shapes and sizes. However they arrive on the scene, they are always appreciated, especially in times ofturbulence. Michael Lindsay (1909 — 94) is a case in point.After graduating from the University of Oxford in 1931, Lindsay arrived in China in 1937 on a ship from Canada intending merely to teach economics at Beiping Yenching University, the current Peking University. He traveled with Norman Bethune the Canadian doctor who dedicated his life to medicine in China during the War of Resistance Against Japanese Aggression (1931 — 45).Lindsay left Beijing at the end of 1941, and went to the Communist-led Jinchaji base(晋察冀边区)together with his wife Li Xiaoli, who was a Shanxi local and a former student of his.“Lindsay was inspired by the hard work local Chinesepeople made in fighting against Japanese aggression. After learning that Chinese armies on the frontlines were suffering supply shortages, Lindsay was determined to lend a hand," says Yan Juhai, a retired official from Shanxi's Lyuliang city. "In the Jinchaji base, NieRongzhen( 1899 — 1992), the base's top commander, appointed him to work as the communications expert, where he became a full-time radio technician contributing greatly in communication technology innovation and training," says Yan.In 1944 Lindsay and his wife arrived in Yan'an in Shaanxi province and helped fix its telecommunication equipment. They stayed for 18 months in Yan'an, and after the victory in the War of Resistance Against Japanese Aggression, they decided to return to the United Kingdom to visit their parents.4. Which word in the following can best replace the underlined word?A. peaceB. warC. stressD. sorrow5. Why did Lindsay go to the Communist-led Jinchaji base according to Yan Juhai?A. Because his wife was a Shanxi local.B. Because he was warmly invited by NieRongzhen.C. Because he was touched by Chinese people's effortsD. Because he was more interested in communications.6. What can we learn from the article?A. Lindsay and his wife stayed in China for over 8 years.B. Lindsay's wife was also skilled in communication technology.C. Lindsay was appointed as the communications consultant in Shanxi province.D. Lindsay taught economics in the Jinchaji base besides his work as a radio expert.7. Where is the text probably from?A. a guidebookB. a novelC. a diaryD. a newspaperCResearchers at CU Boulder have developed a wearable device that changes the human body into a biological battery. The device is stretchy(弹性的) enough that you can wear it like a ring, sport band or any other thing that touches your skin. It also taps into a person's natural heat-employing thermoelectric generators to change the body's internal temperature into electricity. "In the future, we want to be able to power your wearable electronics without having to include a battery," said Jianliang Xiao, an associate professor at CU Boulder.The concept may sound like something out of The Matrix film series, in which a race of robots have enslaved humansto harvest their precious organic energy. Xiao and his colleagues aren't that ambitious: Their devices can generate about 1 volt (伏特) of energy for every square centimeter of skin space-less volt per area than what most existing batteries provide but stillenough to power electronics like watches or fitness trackers.Scientists have previously experimented with similar wearable devices, but Xiao's is stretchy, can heal itself when damaged and is fully recyclable-making it a cleaner alternative to traditional electronics. "Whenever you use a battery, you're depleting(消耗) that battery and will, eventually, need to replace it," Xiao said. "The nice thing about our device is that you can wear it, and it provides you with constant power."Just pretend that you're out for a jog. As you exercise, your body heats up, and thatheat will radiate out tothe cool air around you. Xiao's device captures that flow of energy rather than let it go to waste. "The thermoelectric generators are in close contact with the human body, and they can use the heat that would normally be sent into the environment," Xiao said.8. What does Xiao expect of his device at present?A. It will be used for medical purposes.B. It will be made smaller and wearable.C. It will change natural power into electricity.D. It will supply constant power to wearable devices.9. Why does the author mentionThe Matrixseries in the text?A. To give an explanation.B. To make a comparison.C. To introduce a topic.D. To analyze the cause.10. What does the third paragraph mainly talk about?A. The strengths of Xiao's device.B. The convenience of using a battery.C. The replacement of wearable devices.D. The development of traditional electronics.11. What do we know about Xiao's device from the text?A. It operates with plenty of power.B. It is designed for practical use.C. It benefits people's health in a way.D. It's based on traditional electronics.DMove over, helicopter parents. “Snowplow (扫雪机) parents” are the newest reflection of an intensive (强化的) parenting style that can include parents booking their adult children haircuts, texting their college kids to wake them up so they don’t sleep through a test, and even calling their kids’ employers.Helicopter parenting the practice of wandering anxiously near one’s children, monitoring their every activity, is so 20th century. Some rich mothers and fathers now are more like snowplows: machines moving ahead, clearing any difficulties in their children’s path to success, so they don’t have to suffer failure, frustration (挫折) or lose opportunities.It starts early, when parents get on wait lists for excellent preschools before their babies are born and try tomake sure their kids never do anything that may frustrate them. It gets more intense when school starts: running forgotten homework to school or calling a coach to request that their children make the team.Rich parents may have more time and money to devote to making sure their children don’t ever meet with failure, but it’s not only rich parents practicing snowplow parenting. This intensive parenting has become the most welcome way to raise children, regardless of income, education, or race.Yes, it’s a parent’s job to support the children, and to use their adult wisdom to prepare for the future when their children aren’t mature enough to do so. That’s why parents hide certain toys from babies to avoid getting angry or take away a teenager’s car keys until he finishes his college applications.But snowplow parents can take it too far, some experts say. If children have never faced a difficulty, what happens when they get into the real world?“Solving problems, taking risks and overcoming frustration are key life skills,” many child development experts say, “and if parents don’t let their children experience failure, the children don’t acquire them.”12. What do we know about snowplow parenting?A. It appeared before helicopter parenting.B. It costs parents less than helicopter parenting.C. It was a typical phenomenon of the 20th century.D. It provides more than enough services for children.13. What is mainly discussed about snowplow parenting in Paragraph 4?A. Its cost.B. Its benefits.C. Its popularity.D. Its ending.14. Why does the author mention parents’ taking away car keys?A. To show teenagers are no better than babies.B. To advise teenagers not to treat their cars as toys.C. To advise parents not to buy cars for their teenagers.D. To show it’s appropriate to help children when necessary.15. What’s the possible result of snowplow parenting according to the experts?A. Children lacking problem-solving ability in reality.B. Children mastering more key life skills than parents.C. Children gaining great success in every aspect of life.D. Children meeting no problems or frustration after growing up.第二节（共5小题；每小题2分，满分10分）阅读下面短文，从短文后的选项中选出可以填入空白处的最佳选项。
2020-2021学年四川省泸县第二中学高三英语上学期期中考试试题及参考答案
2020-2021学年四川省泸县第二中学高三英语上学期期中考试试题及参考答案第一部分阅读（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、D四个选项中选出最佳选项AAlthough Adrian Wood had already sent her three oldest children off toWhiteOakElementary SchoolinEdenton,North Carolina, she was anxious when it was her youngest son Amos's turn to start classes.Adriansaid, “Sending Amos to school was such a different path. He was 3 when he started school. He had autism(自闭症)and he didn't speak."Amos struggled to make friends and fit in, but there was always one person there who was very happy to see him. Raymond Brown has worked at the school as a guard for the past 15 years. All of the students know and love him, and he's truly a friend to all. He started callingAdrian's son “Famous Amos” on day one. To the mom's surprise, Amos quickly began responding with a cheerful "Hey, Brown” whenever he saw him. "He wasn't even saying 'daddy' at home, so it was really something, "Adriansaid.“Amos is a hard friend to have,"Adrianexplained, "He takes a lot more than he gives and that's tough for children. But those kids saw that he was popular and loved, and they started fighting over who would get to hold Amos' hand on the way to the classroom. It meant so much to me that he was favored by the other children at school, and Mr. Brown had a big hand in that.”About a year ago, school officials nominated Mr. Brown forNorth Carolina's School Hero, a $20,000 prize. When the results came out and he didn't win,Adrianwas heartbroken. She couldn't let the disappointing results stand, so she took to Facebook and created an annual “Famous Amos” prize for Mr. Brown in their community. Her neighbors answered the call, donating $35,000 in just one week! Townspeople and school officials gathered in March to celebrate Mr. Brown and give him the money they'd raised. Principal Michelle handed him a giant check and thanked him for everything he does to help kids like Amos find their way.1. What madeAdrianworried?A. Her youngest son's bad behavior.B. Her family's heavy financial burden.C. Her youngest son's mental problem.D. Her three sons' poor performance at school.2. What change did Mr. Brown bring to Amos?A. Amos became a top student at school.B. Amos got more attention from other kids.C. Amos learned to share and care about others.D. Amos had a better relationship with his family members.3. What did Mr. Brown get in the end?A. The “Famous Amos” prize.B. A check from the local government.C.North Carolina's School Hero prize.D. A small donation from the community.BNowadays organic food hasbecome a fashion. Organic food sales reached a record of $ 45.2 billion in 2017, making it one of the fastest-growing parts of American agriculture. Some people may buy organic food for these reasons like resource cycling and biodiversity, but most people may choose organic food because they think it's healthier. While a small number of studies have shown relationships between eating organic food and reducing risks of being ill, no studies, up to now, have answered the question whether eating organic food can improve health.According to the United States Department of Agriculture(USDA), organic food does not suggest anything about health. In 20155 Miles McEvoy, then chief of the National Organic Program for the USDA, refused to admit any health benefits of organic food, saying the question has nothing to do with the National Organic Program. Instead, the USDA thinks that organic refers to a production method that increases cycling of resources keeps ecological balance, and protects biodiversity.I'm an environmental health scientist who has spent over 20 years studying pesticides that do harm to human beings. Several years ago, I was part of the study on whether an organic diet can reduce pesticide exposure. This study focused on a group of pesticides which have always been harmful to children's brain development. We found that children who ate traditional diets had nine times higher exposure to these pesticides than children who ate organic diets.Last month, I published a small study that suggested a path forward to answering the question whether eating organic food actually improves health. My study got a lot of attention. While the results were novel, they didn't answer the big question. As I toldThe New York Timesin 2003, “What does this really mean for the safety ofmy kids? But we don't know. Nobody does. It was true then, and it's still true now.”4. Why do most people prefer to buy organic food?A. For its health benefits.B. For biodiversity.C. For its delicious taste.D. For resource cycling.5. What does the USDA suggest about organic food?A. It can improve people's health.B. It is produced in an environment-friendly way.C. It can reduce risks of being ill.D. It has nothing to do with the National Organic Program.6. What can be concluded from the author's study?A. Pesticides don't harm children's brain.B. Traditional diets benefit people's health.C. Organic diets can reduce pesticide exposure.D. The results are meaningful to children's safety.7. What is the best title for the text?A.What Is Organic Food?B. Is Organic Food Healthier?C. How Should We Avoid Pesticides?D. What Are the Benefits of Organic Food?C8. The five passes all include ________.A. a dinner cruiseB. a magic showC. a city tourD. a trolley ride9. Accordingto the rules and restrictions, ________.A. visitors can return their ticketsB. reservations cannot be cancelledC. passes cannot be shared among usersD. users can visit attractions more than once10. To make reservations, you can ________.A. write an e-mailB. make a phone callC. send a text messageD. fill out an online form11. In which section of a newspaper would you most likely find this advertisement?A. Leisure & TravelB. Health & BeautyC. Restaurants & FoodD. Sports & EntertainmentDThe United Nations Educational, Scientific and Cultural Organization (UNESCO) included on December 17, 2020 China's Tai Chi on the Representative List of the Intangible（无形的）Cultural Heritage of Humanity. The decision was announced during the online meeting of the UNESCO Intergovernmental Committee for the Safeguarding of the Intangible Cultural Heritage held from December 14 to19 inKingston, capital ofJamaica.“Born in the mid-17th century in a small village named Chenjiagou located in Central China's Henan province, Tai Chi is not only a kind of traditional Wushu integrated with slow movements and deep breathing, but is also deeply rooted in many areas of Chinese culture, such as medicine and philosophy,”Zhu Xianghua says, who is the son of the famous Tai Chi master Zhu Tiancai.Although it has spread to more than 150 countries and regions, attracting more than 100 million people to practice, the idea that Tai Chi is for the elderly has stopped many young people practicing the ancient Wushu. They think of it as a slow exercise, which is specially made and better suited for their grandparents. Instead, many young people are turning to the Indian practice of yoga（瑜伽）to relieve stress, which was placed on the UNESCO's List in 2019.In order to promote Tai Chi, joint efforts have been made from individuals and the Chinese government in the last decades. Xi'an Jiaotong University requires students to learn Tai Chi. Wang Yunbing, a professor in the university's sports center, stressed that Tai Chi is not only good physical exercise-researchers from the American College of Rheumatology find that it can help manage several diseases but is also conned ted to ancient Chinese eivilization. Since 2014, the World Tai Chi Championships have been held every two years by the International Wushu Federation. It provides a platform for communication and learning between the Tai Chi masters and Tai Chi lovers around the globe. In January 2020, Tai Chi became an official event in the 2026 Dakar Youth Olympic Games.12. What does Zhu Xianghua say about Tai Chi in paragraph 2?A. It originated from fast Kung Fu action.B. It was born around the 1750s in a village.C. It is related to other cultural fields ofChina.D. It integrates Chinese medicine and western philosophy.13. Why do some young people choose to practice yoga instead of Tai Chi?A. They think it easier to practice yoga to keep fit.B. The elderly stop young people practicing Tai Chi.C. They consider Tai Chi is custom-built for old people.D. Yoga was included in the world culture earlier than Tai Chi.14. What is the main purpose of the last paragraph?A. To promote contemporary Chinese civilization.B. To show many efforts made to popularize Tai Chi.C. To stress the importance of Chinese Tai Chi masters.D. To advise people to practise Tai Chi to cure diseases.15. Which of the following is the best title for the passage?A. Tai Chi Steps on the UNESCO's List.B. Tai Chi isCompeting against Yoga.C. Tai Chi Has Regained populate Globally.D. Opinions Greatly Differ on Tai Chi and Yoga.第二节（共5小题；每小题2分，满分10分）阅读下面短文，从短文后的选项中选出可以填入空白处的最佳选项。
2020-2021学年泸县二中高三英语期中考试试卷及答案
2020-2021学年泸县二中高三英语期中考试试卷及答案第一部分阅读（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、D四个选项中选出最佳选项AIn theUnited States, the word "holiday" is synonymous with celebration. The following tenholidaysper year are proclaimed by the federal government.Independence DayIndependence Day is annually celebrated on July 4 and is often known as "the Fourthof July”. It is the anniversary of the publication of the declaration of independence fromGreat Britainin 1776. Now it is celebrated in all the states. The army marks the occasion by firing a 13-gun salute every year. Ceremonies may include parades, official speeches, visits to historic monuments and fireworks displays.Memorial DayThis holiday, on the fourth Monday of every May, is a day on which Americans honor the dead. Originally a day on which flags and flowers were placed on graves of soldiers who died in the American Civil War, now it has become a day on which the dead of all wars and all other dead are remembered the same way.Veterans DayVeterans Day was established to honor Americans who had served in World War I. It falls on November 11, the day when that war ended in 1918, but it now honors veterans of all wars in which the United States has fought Veterans' organizations hold parades or other special ceremonies, and the US president customarily places a wreath on the Tomb of the Unknowns at Arlington National.ThanksgivingThanksgiving Day is celebrated on the fourth Thursday in November. It has been an annual tradition in theUnited Statessince 1863. Today, people celebrate Thanksgiving to remember these early days. The most important part of the celebration is a traditional dinner. Thanksgiving dinner almost always includes some of the foods served at the first feast: roast turkey, cranberry sauce potatoes pumpkin pies. Before the meal begins, families often pause to give thanks.1. When isIndependence Day?A. May 14，B. July 13.C. July 14.D. July 4.2. Which holiday honors dead soliders?A. Independence Day.B. Memorial Day.C. Veterans Day.D. Thanksgiving.3. What will Americans do on Thanksgiving Day?A. They say thanks.B. They havefriend gatherings.C. They go on holiday.D. They buy many cards.BThe shade of a single tree can provide welcome relief from the hot summer sun. But when that single tree is part of a small forest, it creates a considerable cooling effect. According to a study published today in the Proceedings of the National Academy of Sciences, trees play a big role in keeping our cities cool.According to the study, the right amount of tree cover can lower summer daytime temperatures by as much as 10 degrees Fahrenheit. And the effect is quite noticeable from neighborhood to neighborhood, even down to the scale of a single city block. “We knew that cities are warmer than the surrounding countryside, but we found that temperatures vary just as much within cities,” says Monica Turner, a professor in the department of Integrative Biology, Wisconsin-Madison University and a co-author of the study.With climate change making extreme heat events more common each summer, city planners are working on how to prepare. Heat waves drive up energy demands and costs and can have big human health impacts. One potentially powerful tool, the study's authors say, are organisms that have been around long before human civilizations could appreciate their leafy benefits. And those trees may be the secret to keeping the places we live livable.Essentially, says Turner, roads, sidewalks and buildings absorb heat from the sun during the day and slowly release that heat at night. Trees, on the other hand, not only shade those surfaces from the sun's rays, they also release water into the air through their leaves, a process that cools things down.To get the maximum benefit of this cooling service, the study found that tree cover must be more than 40 percent. In other words, an aerial picture of a single city block would need to be nearly half-way covered by a leafy green network of branches and leaves.4. What can we infer from Paragraph 2?A. Temperatures in cities mainly depend on their green coverage.B. People living and working in cities must plant trees in summer.C. Cities are warmer than the countryside because they don't have trees.D. An area with more trees can be cooler than the other parts within a city.5. Which of the following problems is caused by extreme heat events?A. Severe damage of city facilities.B. Serious human health problems.C. Residents' growing demands for plants.D. Unnecessary waste of energy resources.6. Why are trees crucial to cities?A. They help shade and cool the cities.B. They make urban scenery beautiful.C. They build up city cooling systems.D. They essentially block and release heat.7. What can city planners conclude from the study?A. They should publish the study in a newspaper.B. They should educate citizens to protect forests.C. They should plant trees on roads and sidewalks.D. They should cover nearly half the city with trees.CGerardo Ixcoy is a 27-year-old teacher in Guatemala. He teaches in the area where having electricity is something of a luxury and students have no access to mobile apps or computers, which became a problem when Guatemalan government had to choosedistance education for students at home because of COVID-19 inmid-March.Gerardo Ixcoy felt that he had to teach those children living far from the digital world. After all, education is a universal right. But what was the solution?Gerardo bought himself a secondhand tricycle with his savings. Once he had the tricycle, the next step was to change it into a classroom on wheels. He put a roof with a solar panel（太阳能电池板）on it, along with a screen to avoid the spread of COVID-19. He fixed a whiteboard on it so he could explain to the students the basics of primary education：math, the local language and the national language Spanish.The purpose of the solar panelis to provide constant power for a small loudspeaker so he can teach from a distance. It's a matter of respecting the healthy distance required to be safe from the virus. He, the teacher, stays outside, and the student participates from his or her house.He tries to visit his students at least twice a week, riding his classroom — cycle. The children he serves say that, although he visits them for only a few hours a week, they look forward to it. They appreciate his visit because they know he has limited time he can devote to them. They must take advantage of it to learn.8. What happened to Gerardo Ixcoy's students because of COVID-19?A. They chose to have classes in groups.B. They had to stop all the classes.C. They continued to have classes online.D. They started to learn about computers.9. Why does the teacher stay from a distance while teaching?A. Because healthy distance is reqired.B. Because he doesn't want to see his students.C. Because he wants to show his authority.D. Because the local custom reqiries him to.10. Where did Gerardo Ixcoy teach his students?A. In his own house.B. In his student's house.C. On the school playground.D. Outside his student's house.11. What can be the best title of the story?A. Love breaks down barriers.B. Hard work pays off.C. Time is money.D. Education is the key to success.DPeople saved a 20-foot orca (虎鲸) that was stuck between rocks on an Alaskan shore by continuously pouring water over it and protecting it from birds who circled above the defenseless whale.The whale was ultimately saved after a six-hour, labor-intensive life-saving operation. Someone spotted the large whale on the Prince of Wales Island near the coast of British Columbia on the morning of July 29th. The Coast Guard was called around 9 a.m. local time. Chance Strickland, the captain of a private yacht in Alaska, and his crew anchored and began life-saving action that were videoed by Aroon Melane and posted on the Internet.Strickland could hear the orca calling out to killer whales swimming in the area. People on other boats stopped with water and buckets to pour water over the animal. “There were tears coming out of its eyes,” Mr. Strickland told the local newspaper. “It was pretty sad.”The group of people formed a chain that passed buckets of seawater back and forth and poured the water on the orca, which seemed to liven it up. It made a noise and raised its tail when it got water.The National Oceanic and Atmospheric Administration (NOAA) was called in, which can be seen on the video using a machine to spray amist of seawater on the orca, which doubled as a way to keep the whale cool and scare the large group of birds that were hoping to feast on the beast.Melane said in her video that the orca was stranded (搁浅) for about six hours until the tide came inandswept it back into the ocean. The group efforts of Strickland’s crew and the NOAA saved the 13-year-old killer whale.12. Why did birds circle above the orca?A. They were eager to eat it.B. They wished to protect it.C. They were attracted by the people.D. They wanted to find a place to rest.13. What did Strickland do immediately after finding the whale?A. Posted pictures online.B. Called friends for help.C. Took action to save it.D. Videoed the trapped animal.14. Why did the whale make a noise and raise its tail?A. To express its eager for water.B. To extend its thanks to people.C. To call out to its fellow whales.D. To show its power and sadness.15. Which can be the best title for the text?A. Killer Whale Got SavedB. The Orca Inspired KindnessC. Combined Efforts WantedD. Animals and Humans United第二节（共5小题；每小题2分，满分10分）阅读下面短文，从短文后的选项中选出可以填入空白处的最佳选项。
四川省泸州市泸县第二中学2020-2021高二英语上学期期中试题
四川省泸州市泸县第二中学2020—2021学年高二英语上学期期中试题第Ⅰ卷 (选择题共100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)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 is the man looking for?A. Vegetables。
B. Orange juice。
C. An employee。
2。
What is Pat wearing?A。
A white hat. B。
A white shirt。
C。
A brown shirt.3. What did the man borrow from the woman?A。
Her iPhone. B。
Her iPod. C. Her gym bag.4. Who will the man call?A。
His wife。
B. His boss。
C。
A taxi.5. What happened to the woman？A。
She was late for school。
B。
She got lost while driving。
C. She couldn’t find a parking spot.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.听每段对话或独白前,你将有时间阅读各个小题,每小题5秒钟；听完后，各小题将给出5秒钟的作答时间。
每段对话或独白读两遍.听第6段材料,回答第6、7题。
6。
What does the woman say about puppies?A. They are free。
2020-2021学年四川省泸县第二中学高三英语期中试题及答案
2020-2021学年四川省泸县第二中学高三英语期中试题及答案第一部分阅读（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、D四个选项中选出最佳选项AThe question of whether our government should promote science and technology or the liberal arts in higher education isn’t an either / or one, although the current emphasis on preparing young Americans for STEM (science, technology, engineering, maths)-related fields can make it seem that way.The latest congressional report acknowledges the critical importance of technical training, but also insists that the study of the humanities and social sciences must remain central elements of America’s educational system at all levels. Both areas are the key to producing citizens who can participate effectively in our democratic society, become innovative leaders, and benefit from the spiritual enrichment that the reflection on the great ideas of mankind over time provides.Parents and students who have invested heavily in higher education worry about graduates’ job prospects as technological advances and changes in domestic and global markets transform professions in ways that reduce wages and cut jobs. Under these circumstances, it’s natural to look for what may appear to be the most “practical” way out of the problem; “major in a subject designed to get you a job” seems the obvious answer to some, though this ignores the fact that many disciplines in the humanities characterized as “soft” often, in fact, lead to employment and success in the long run. Indeed, according to surveys, employers have expressed a preference for students who have received a broadly-based education that has taught them to write well, think critically, research creatively, and communicate easily.Moreover, students should be prepared not just for their first job, but for their 4th and 5th jobs, as there’s little reason to doubt that people entering the workforce today will be called upon to play many different roles over the course of their careers. The ones who will do the best in this new environment will be those whose educations have prepared them to be flexible. The ability to take advantage of every available tool and insight—picked up from science, arts, and technology—to solve the problems of the future, and seize the opportunities, will be helpful to them and the nation.1. What does the latest congressional report suggest?A. STEM-related subjects help students find jobs in the information society.B. The humanities and STEM subjects should be given equal importance.C. The liberal arts in higher education help enrich students’ spiritual life.D. Higher education should be adjusted to the practical needs of society.2. What is the main concern of students when they choose a major?A. Their interest in relevant subjects.B. The academic value of the courses.C. The quality of education to receive.D. Their chances of getting a good job.3. What does the author say about the so called “soft” subjects?A. They benefit students in their future life.B. They broaden students’ range of interests.C. They just improve students’ communication skills.D. They are essential to students’ healthy growth.BMost people around the world are right-handed. This also seems to be true in history. In 1799, scientists studied works of art made at different times from 1,500 B.C. to the 1950s. Most of the people shown in these works are right-handed, so the scientists guessed that right-handedness has always been common through history. Today, only about 10% to 15% of the world’s population is left-handed.Why are there more right-handed people than left-handed ones? Scientists now know that a person’s two hands each have their own jobs. For most people, the left hand is used to find things or hold things. The right hand is used to work with things. This is because of the different work of the two sides of the brain. The right side of the brain, which makes a person’s hands and eyes work together, controls the left hand. The left-side of the brain, which controls the right hand, is the centre for thinking and doing problems. These findings show that more artists should be left-handed, and studies have found that left-handedness is twice as common among artists as among people in other jobs.No one really knows what makes a person become right-handed instead of left-handed. Scientists have found that almost 40% of the people become left-handed because their main brain is damaged when they are born. However, this doesn’t happen to everyone, so scientists guess there must be another reason why people become left-handed. One idea is that people usually get right-handed from their parents. If a person does not receive the gene(基因) for right-handedness, he / she may become either right-handed or left-handed according to the chance and the people they work or live with.Though right-handedness is more common than left-handedness, people no longer think left-handed people are strange or unusual. A long time ago, left-handed children were made to use their right hands like other children, but today they don’t have to.4. After studying works of art made at different times in history, the scientists found _______.A. the art began from 1,500B.C.B. the works of art ended in the 1950sC. most people shown in the works of art are right-handedD. most people shown in the works of art are left-handed5. What is the left hand for most people used to do?A. It’s used to find or hold things.B. It’s used to work with things.C. It’s used to make a person’s eyes work together.D. It’s the centre for thinking and doing problems.6. According to the passage, which of the following is NOT true?A. No one really knows what makes a person become right-handed.B. Left-handedness is cleverer than right-handedness.C. Today children are not made to use their right hands only.D. Scientists think there must be some reason why people become left-handed.7. The best title for this passage is _______.A. Scientists’ New InventionsB. Left-handed PeopleC. Which HandD. Different Brains, Different HandsCWhen rescuers were called to rescue a “little owl”, they did not expect to find one that was too fat to fly. A concerned citizen first spotted the poor bird lying helplessly. Even Rufus Samkin, whose team then took the team in on Jan.3, believed the bird to be injured. There were no wounds to be found, however, causing experts to believe the female owl was simply too wet to fly.But it was only after a thorough drying-off and complete checkup that they noted the real issue. The rescuers weighed the owl and concluded that she was “simply extremely obese” and couldn’t take off. This additional weight left her unable to fly, though experts began to wonder how she got so fat in the first place. Because it’s rather unusual for wild birds to reach such a state, they decided to keep her a few weeks and monitor her.In the end, the rescuers assessed that it was simply a case of “natural obesity”. December 2019 was quite warm, which meant that there were many insects for the bird to feast upon. Indeed, the owl was discovered in a field that was “filled with field mice” due to the usual climate. “It’s been very mild here, and the owl is able to findfoods easily,” Samkin explained. With the sudden food, “she ly ate much and got very fat. She had a lovely time, but went too far.”The researchers consequently put the owl on a “strict diet” so she could shrink to a more “natural weight”. She was even put on a bit of exercise and encouraged to fly around. In the end, the bird was sent flying gracefully off into the British countryside at a much healthier and happier weight. Hopefully, this owl won’t come upon another feast of field mice—unless she wants another few weeks at the fat camp.8. What did people think happened to the owl at first?A. She was hurt.B. She was trapped.C. She was hungry.D. She was wet.9. Why was the bird unable to fly?A. She needed a thorough checkup.B. She should be given a drying-off.C. She was completed overweight.D. She was simply extremely strong.10. What made the owl have enough foods?A. The especially warm weather.B. The reducing number of insects.C. The rich fields growing crops.D. The lovely time the bird enjoyed.11. How did the owl loseits weight?A. Going on a diet and exercising.B. Flying in the British countryside.C. Visiting that fat camp again.D. Enjoying her wonderful feast freely.DThe Rise of Voice TechnologyVoice technology has come a long way. Just a few years ago, it would have been unusable. But now, those who follow the technology know that it has got considerably better.Writing with your voice raises several interesting questions. How difficult is it actually? Human speech involves a lot more starting and stopping with errors and the need for repairing broken sentences than you may think. Even gifted speakers make mistakes. To turn the spoken word into reasonable writing requires lots of planning. You’ll need some kinds of notes or other organisers to make it work.Another question turning speech into writing raises is the style. How would writing make the change that people speak their writing rather than type? Chances are that it would come up with many more short sentences and more concrete language, which is good. It would probably also rely on prepared phrases a lot more often, which is not available when you are speaking quickly.To confirm this, a column was not written, but dictated (听写). It was composed from brief notes written down for structure only, and it was edited for length, with all of the original errors kept in. Here were the results. The first was that the literal accuracy was extremely high. There weren’t many cases wherethe software had heard one word incorrectly and written down another. But the other result was that the readability of this column was rather bad. Obviously, the blame is not with the technology at all, which turns out to be rather good. Speaking into writing relies on a better human brain than the one we currently possess. Writing is hard. There’s a reason it can’t be done at the speed of speech, in real time.To clarify the matter, this time paragraph breaks were added after the whole writing. Punctuations (标点) had to be spoken aloud, and after a full stop, the first word in the new sentence was capitalized automatically. Some minor punctuation marks were added to make it clearer. To improve accuracy, people “trained” the software beforehand, reading a prewritten passage aloud. Actually it turns out to be more effective. All of these ensure the satisfactory completion of turning speech into writing.Language is the most important tool for human interaction, and voice is one beautiful part of language. With the maturity of modern technology, it has given birth to a great change in the human-computer voice interaction.12. According to the passage, which helps to turn speech into writing in terms of style?A. There is careful planning in advance.B. Errors and broken sentences are avoided.C. People type words as fast as they say them.D. The writing contains more prepared phrases.13. To achieve better results, the author mentions some changes for ______.A. processing errors in a column.B. adding minor punctuation marks.C. increasing the number of brief notes.D. integrating short paragraphs in writing.14. The author suggests that ______.A. human brains are responsible for poor dictated writing.B. writing with voice promises to improve the quality of writing.C. writing is an unnatural act that can hardly be learned and improved.D. technology has a long way to go in the human-computer voice interaction.15. What is the passage mainly about?A. Why people fully intend to turn speech into writing.B. What role voice technology plays in improving readability.C. Where the human-computer voice interaction is at an advantage.D. How voice technology enables the change from speech into writing.第二节（共5小题；每小题2分，满分10分）阅读下面短文，从短文后的选项中选出可以填入空白处的最佳选项。
泸县二中高2020┄2021届2020┄2021届春期期末联考化学模拟试题
泸县二中高2022级2021年春期期末联考化学科模拟试题1．本试卷分Ⅰ卷（选择题）和Ⅱ卷（非选择题）两部分,满分108分。
2．可能用到的原子量数据：H—1 C—12 O—16 Mg—24 P—31第Ⅰ卷（选择题，共48分）6．2005年6月5日是第34个世界环境日，联合国环境署确定今年的活动主题是“营造绿色城市,呵护地球家园”我国环保总局确定的主题是“人人参与,创建绿色家园”，下列活动不符合这一主题的是A．推广垃圾分类存放，分类回收，分类处理B．改革传统采煤时将煤层气（瓦斯气，主要成分甲烷）直接排入空气的做法，先开采和综合利用煤层气，然后再采煤。
C．推广使用液化石油气（LPG）替代汽油和柴油作公交车和出租车的燃料D．将工厂的烟囱造高，以减少工厂周围的大气污染7．下列元素中，不属于主族元素的是A．磷 B．铁 C．钙 D．碘8．近期《美国化学会志》报道，中国科学家以二氧化碳为碳源，金属钠为还原剂，在470℃、80MPa下合成出金刚石，具有深远意义。
下列说法不正确的是A．由二氧化碳合成金刚石是化学变化B．金刚石是碳的一种同位素C．钠被氧化最终生成碳酸钠D．金刚石中只含有非极性共价键9．下列离子方程式正确的是A．澄清石灰水与稀盐酸反应Ca（OH）2+2H+=Ca2++2H2OB．钠与水反应Na+2H2O=Na++2OH-+H2↑C．铜片插入硝酸银溶液中Cu+Ag+=Cu2++AgD．大理石溶于醋酸的反应CaCO3+2CH3COOH=Ca2++2CH3COO-+CO2↑+H2O 10．用N A表示阿伏加德罗常数，下列叙述中正确的是A． 0．1mol•L—１稀硫酸100mL中含有硫酸根个数为0．1N AB． 1 molCH3+（碳正离子）中含有电子数为10N AC． 2．4g金属镁与足量的盐酸反应，转移电子数为2N AD．12．4g白磷中含有磷原子数为0．4N A11．常温时，以下4种溶液pH最小的是A．0．01mol·L-1醋酸溶液B．0．02mol·L—1醋酸与0．02mol·L—1NaOH溶液等体积混合液C．0．03mol·L—1醋酸与0．01mol·L—1NaOH溶液等体积混合液D．pH=2的盐酸与pH=12的NaOH溶液等体积混合液12．已知反应A2（g）+2B2（g） 2AB2（g）的△H<0，下列说法正确的是A．升高温度，正向反应速率增加，逆向反应速率减小B．升高温度有利于反应速率增加，从而缩短达到平衡的时间C．达到平衡后，升高温度或增大压强都有利于该反应平衡正向移动D．达到平衡后，降低温度或减小压强都有利于该反应平衡正向移动姓名班级学号13．为确定下列置于空气中的物质是否变质，所选检验试剂（括号内物质）不能达到目的的是A．Na2SO3溶液（BaCl2溶液）B．FeCl2溶液（KSCN溶液）C．KI（淀粉溶液） D．HCHO溶液（石蕊试液）化学选择题答题栏：小题号678910111213答案总分栏；题号选择题26272829总分得分化学Ⅱ卷（共60分）26．（9分）如下图所示，A、B、C是实验室常用的三种制取气体的装置，提供的药品有：大理石、浓盐酸、稀盐酸、锌粒、二氧化锰、氯化铵、熟石灰．现欲利用这些药品分别制取NH3、Cl2、H2、CO2四种气体，试回答以下问题．（1）选用A装置可制取的气体有________________选用B装置可制取的气体有________________通常选用C装置制取的气体有________________（2）标号①、②的仪器名称依次为________________ ，________________（3）写出利用上述有关药品制取氨气的化学方程式：________________________________________________若要制得干燥的氨气，可选用下列干燥剂中的________________（填序号）A．生石灰 B．浓硫酸 C．五氧化二磷27．（26分）（Ⅰ）某一反应体系有反应物和生成物共五种物质：O2、H2CrO4、Cr （OH）3、H2O、H2O2已知该反应中H2O2只发生如下过程：H2O2→ O2（1）该反应中的还原剂是。
2020-2021学年泸县二中高三英语下学期期中试卷及参考答案
2020-2021学年泸县二中高三英语下学期期中试卷及参考答案第一部分阅读（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、D四个选项中选出最佳选项AFour Best Cities to Visit in WinterCold rains, icy sidewalks and gray skies can make winter travel a trial. But here are four cities around the world that make for a great cold-weather destination:Prague,Czech RepublicWith its snow-capped spires and winding streets,Pragueis a fairytale city that remains ly tourist-free in winter.The amazing architecture looks even prettier under a sheet of snow, with one of the most beautiful areas being the old town, with its Romanesque vaults. Gas street lamps have been placed throughout the city center, adding a romantic color1 to evenings. Cafes here are ideal for escaping the bitter cold.Salzburg,AustriaWith its Christmas songs and traditional markets, this is a perfect city for a winter break. “Silent Night” was performed for the first time in thechurchofOberndorfon the border ofSalzburgon Christmas Eve in 1818.The city's main market is held in the shadow ofSalzburg'sHohensalzburgCastle, but the one held inMirabell Squareis especially popular with food lovers who come to taste local food such as halusky—pieces of dumpling mixed with fried bacon.Tromso,NorwayTromso is widely regarded asNorway's most beautiful city and is a base for spoiling the northern lights. There are several attractive museums, including thePolarMuseum, which offers an insight into the history of Arctic expeditions, and theTromsoMuseum, which is famous for its Sami exhibitions.Amsterdam,NetherlandsIn winter,Amsterdam' s museums are much less crowded, making it the time to visit attractions such as Rijksmuseum or the Anne Frank House. Built originally to house a circus, the Royal Carre Theater is more than 130 years old. Children will love the spectacular performances.1. What can you do inPrague?A. Enjoy the fascinating architecture.B. Taste local food halusky.C. Appreciate Sami exhibitions.D. Watch a circus performance.2. Where was “Silent Night” first performed?A. In thechurchofOberndorf.B. InHohensalzburgCastle.C. InMirabell Square.D. In the Polar Museum.3. Which city will you choose if you want to see the northern lights?A. Prague.B. Salzburg.C. Tromso.D.Amsterdam.BCompared to dogs, cats are often considered to be aloof（冷漠的）with respect to their human owners. It is usual for them to be indifferent（无动于衷的）when humans calltheir names. Are we sure that they don’t understand human voices at all?A recent study published in the journal of Scientific Reports suggests that we’ve been fooled. Japanese scientists found that cats can recognize their names if their owners regularly use them. In the study, scientists recruited 78 domestic cats. They played recordings of voices of their owners saying five words: the first four words were random nouns thatresembledtheir names while the final word was the cat’s name. Then they observed the cats’ responses, if there were any.Most of cats moved their ears or heads when they heard their names, while they made no response to other words. That suggested, “cats were paying attention to you, what you say and what you do,” John Bradshaw, an expert on human-animal interactions（互动）at the University of Bristol, UK, told The Times. “And cats were just as good as dogs at learning,” she added.In the study, when people called their names, cats often associated (联系) the words with rewards, such as food or play, or with “punishments” such as having a bath or going to the vet . This made cats sensitive (敏感的) to words. After the cats had been called several times, they could respond to the words. But the scientists added that while dogs have evolved（进化）to follow their owners’ orders, cats have not. Although cats appear to be distant, they do have special relationships with their owners.According to study co-author Atsuko Saito, cats have evolved not to show their emotions as a survival method. One example is illness, which they tend to hide because “in the wild, no one can rescue them” and predators (捕食性动物) are more likely to pay attention to them, Saito explained.However, technology may help bridge the communication gap between cats and us. There are now mobile apps available to explain what their meows mean. So, the next time you hear “meow, meow”,your cat may be telling you: “Hi, you haven’t cleaned my litter box recently.”4. What did the recent study find about cats?A. Cats can recognize their names.B. Cats are cleverer than dogs.C. Cats learn more slowly than dogs.D. Cats are willing to follow orders.5. What does the underlined word“resembled”in paragraph 2 probably mean?A. were limited toB. were different fromC. were similar toD. were away from6. Why do cats appear distant to their human owners?A. They associate words with punishments.B. They want to protect themselves from harm.C. They are not sensitive to the human voice.D. They don’t pay much attention to their surroundings.7. What can be inferred from the last paragraph?A. It is difficult to understand cats’ meows.B. Interaction with your cats is very important.C. Cats do have good relationships with their owners.D. We may know cats better with the help of technology.CHow much do consumers care about the carbon footprint of the products they buy? Would they care more if the goods were labeled with emissions（排放物）data?Does it matter at which stage in the lifecycle of a product the carbon is emitted? Research published in the International Journal of Environmental Policy and Decision Making offers a way to find out．Study participants view a carbon footprint label as similar to labels that have appeared on some existing products．The label shows the carbon dioxide emissions connected with their production, transportation, usage and disposal（清理）, thus showing the buyer the likely effect on climate change of buying a particular product．In the first group of studies, the research team proved that carbon emissions and a carbon emissions label would indeed play a role in consumer product decisions, although not as great a role as price．In a second set of studies, the team found that emissions connected with usage were most important to consumers followed by the transportation and disposal stages．The carbon footprint of the producing process was considered less important to consumers than the other stages in the product's lifecycle because it is outside the consumer's control．That is, the participants felt they were less responsible for carbon emitted during producing process．Consumers value recycling a product, but the researchers found that, overall, the consumers would preferproducers to offset（补偿）carbon emissions rather than having toaddressthe problem directly themselves．Consumers are increasingly concerned with climate change problems, and already carbon labeling is appearing on some products．"We find that participantsnot only take the carbon label into account when making product decisions, but they want detailed information on the label," the researchers explain．They suggest that companies should prepare for how carbon emissions labels might affect future consumer choice．8. Which of the following most affects consumer's choice?A. Labels．B. Price．C Packaging． D. Carbon footprint．9. About the carbon dioxide emissions in the product's lifecycle, which stage do consumers care most?A. Usage stage．B. Transportation stage．C. Disposal stage．D. Producing stage．10. Which of the following can best replace the underlined word "address"?A. Look into．B. Point out．C. Deal with．D. Run into．11. What can be inferred from the last paragraph?A. Companies should take carbonemissions more seriously．B. All products have been labeled with carbon emissions data．C. Producers will attach less importance to carbon emissions labels．D. Products labeled with carbon emissions data will have poor sales．DYou run into the grocery store to quickly pick up your item. You grab what you need and head to the front of the store. After quickly sizing up the check-out lines, you choose the one that looks fastest. You chose wrong. People getting in other lines long after you have already checked out and headed to the parking lot. Why does this seem to always happen to you?Well, as it turns out, it's just math that is working against you. A grocery store tries to have enough employees at the checkout lines to get all their customers through with minimum delay. But sometimes, like on a Sunday afternoon, they get super busy. Because most grocery stores don't have the physical space to add more checkout lines, their system becomes overburdened. Some small interruption — a price check, a particularly talkative customer — will have downstream effects, holding up the entire line behind them.If there are three lines at the store, these delays will happen randomly at different registers (收银台). Thinkabout the probability. The chances of your line being that fastest one are only one in three, which means you have a two-thirds chance of not being in the fastest line. So it's not just in your mind: Another line is probably moving faster thanyours.Now, mathematicians have come up with a good solution, which they call queuing theory, to this problem: Just make all customers stand in one long snaking line, called a serpentine line, and serve each person at the front with the next available register. With three registers, this method is about three times faster on average than the more traditional approach. This is what they do at most banks, Trader Joe's, and some fast-food places. With a serpentine line, a long delay at one register won't unfairly punish the people who lined up behind it. Instead, it will slow everyone down a little bit.12. What phenomenon is described in the first paragraph?A. Queuing in a line.B. A shopping experience.C. A rush in the morning.D. Cutting in a line.13. According to the article, what may cause delays in checking out?A. The lack of employees in the grocery store.B. Some unexpected delays of certain customers.C. The increasing items bought by customers.D. A worsening shopping system of the store.14. What is the solution given by mathematicians?A. Employing more workers for checking out.B. Limiting the number of queuing people.C. Making only one line available.D. Always standing in the same line.15. What's the principle behind the queuing theory?A. To pursue the maximum benefit.B. To leave success or failure to luck.C. To avoid the minimum loss.D. To spread the risk equally among everyone.第二节（共5小题；每小题2分，满分10分）阅读下面短文，从短文后的选项中选出可以填入空白处的最佳选项。
四川省泸县第二中学2020-2021学年高二下学期期中考试理综-物理试题含答案解析
四川省泸县第二中学【最新】高二下学期期中考试理综-物理试题学校:___________姓名：___________班级：___________考号：___________一、单选题1．一个单摆在地面上做受迫振动，其共振曲线(振幅A与驱动力频率f的关系)如图所示，则( )A．此单摆的固有周期约为0.5 sB．此单摆的摆长约为lmC．若摆长增大，单摆的固有频率增大D．若把该单摆移到月球上，则在月球上该单摆的共振曲线的峰将向右移动2．如图所示为低空跳伞表演，假设质量为m的跳伞运动员，由静止开始下落，在打开伞之前受恒定阻力作用，下落的加速度为45g，在运动员下落h的过程中，下列说法正确的是A．运动员的重力势能减少了45 mghB．运动员的动能增加了45 mghC．运动员克服阻力所做的功为45 mghD．运动员的机械能减少了45 mgh3．如图所示，两根相距为l的平行直导轨ab、cd，b、d间连有一定值电阻R，导轨电阻可忽略不计．MN为放在ab和cd上的一导体杆，与ab垂直，其电阻也为R．整个装置处于匀强磁场中，磁感应强度的大小为B，磁场方向垂直于导轨所在平面(指向图中纸面内)．现对MN施力使它沿导轨方向以速度v(如图)做匀速运动．令U表示MN两端电压的大小，则()A．U＝12Blv，流过定值电阻R的感应电流由b到dB．U＝12Blv，流过定值电阻R的感应电流由d到bC．U＝Blv，流过定值电阻R的感应电流由b到dD．U＝Blv，流过定值电阻R的感应电流由d到b4．如图甲所示为一台小型发电机构造的示意图，线圈逆时针转动，产生的电动势随时间变化的正弦规律图象如图乙所示．发电机线圈内电阻为1.0Ω，外接灯泡的电阻为9.0Ω．则（）A．在t＝0.01s的时刻，穿过线圈磁通量为零B．瞬时电动势的表达式为e＝6sin50πt（V）C．电压表的示数为6VD．通过灯泡的电流为0.6A二、多选题5．在静电场中，有一带电粒子仅在电场力作用下做变加速直线运动，先后经过A、B、C点运动到D点．在粒子通过A点时开始计时，此过程的“速度-时间”图象如图所示．下列说法正确的是( )A ．A 点的电场强度最大B ．A 点的电势小于B 点的电势C ．粒子在A 点的电势能大于在B 点的电势能D ．A 、C 两点的电势差U AC 与C 、D 两点的电势差U CD 相等6．如图所示，在水平面内有两根平行光滑导轨，导轨间距为d ，左端连接一个定值电阻R 0，右端连接一竖直光滑的四分之一圆弧轨道，轨道半径为r ，平行导轨右端的空间区域内存在方向竖直向上的匀强磁场，磁感应强度大小为B ．一导体棒垂直水平导轨放置，电阻为R 1,质量为m ．在外力作用下，导体棒从水平轨道某处开始沿导轨运动，在滑过圆弧轨道过程中，导体棒的速率始终为v ，导体棒到达圆弧轨道最高点时撤去外力．运动过程中导体棒与导轨始终垂直且接触良好，不计导轨电阻，不计空气阻力、重力加速度为g ,下列说法正确的是( )A ．导体棒沿圆弧轨道上滑时，流过导体棒的电流方向为a →bB ．导体棒沿圆弧轨道下滑的过程中，流过电阻R 0的电荷量与上滑时相等C ．导体棒一定能回到水平导轨D ．导体棒沿圆孤轨道下滑过程中产生的热量小于212mgr mv 7．如图为“阿特伍德机”模型，跨过光滑且质量不计的定滑轮用轻绳栓接质量为m 和2m 的物体甲、乙．将两物体置于同一高度，将装置由静止释放，经一段时间甲、乙两物体在竖直方向的间距为l ，重力加速度用g 表示．则在该过程中( )A ．甲的机械能一直增大B ．乙的机械能减少了23mgl C ．轻绳对乙所做的功在数值上等于乙的重力所做的功 D ．甲的重力所做的功在数值上小于甲增加的动能8．电动自行车是一种应用广泛的交通工具，其速度控制是通过转动右把手实现的，这种转动把手称“霍尔转把”，属于传感器非接触控制．转把内部有永久磁铁和霍尔器件等，截面如图甲．开启电源时，在霍尔器件的上下面之间加一定的电压，形成电流，如图乙．转把转动永久磁铁也跟着转动，霍尔器件能输出控制车速的电势差，已知电势差与车速关系如图丙，以下关于“霍尔转把”叙述正确的是（）A．为提高控制的灵敏度，永久磁铁的上下端分别为N、S 极B．按图甲顺时针转动把手，车速变快C．图乙中从霍尔器件的左、右侧面输出控制车速的电势差D．若霍尔器件的上下面之间所加电压正负极性对调，不影响车速控制三、实验题9．某同学利用“验证牛顿第二定律”的实验器材，测量滑块和长木板之间的动摩擦因数．如图所示，带滑轮的长木板水平放置，力传感器固定在墙上，轻绳分别跨过固定在滑块上和固定在长木板末端的滑轮，一端与力传感器连接，另一端竖直悬挂一砂桶，砂桶距地面足够远．调节两滑轮的位置使轻绳与长木板平行，不计轻绳与各滑轮之间的摩擦．（1）实验时，一定要进行的操作是______(填选项前的字母)．A．将长木板右端垫高以平衡摩擦力B．使砂和砂桶的总质量远小于滑块质量C．将打点计时器接交流电源D．用天平测砂和砂桶的总质量（2）实验时，记录力传感器的示数F，用天平测出滑块质量m，由纸带上的点求出加速度a.根据这些数据，可以得出滑块和长木板间的动摩擦因数的表达式μ＝_____．(重力加速度为g)10．某同学从废旧实验仪器上拆下一个标有“200Ω，2kW”字样的电阻，但可能阻值已经发生变化．为了测定其电阻，该同学利用欧姆表测定其阻值时，欧姆表选择开关处于“×10”档，表盘示数如图1．(1)为准确测定其阻值，他又寻找了一块手机电池（电动势E标称值为3.7V，允许最大放电电流为100mA）及以下器材A．电压表V（量程3V，电阻R V约为3.0kΩ）B．电流表A1（量程15mA，电阻R A1约为1Ω）C．电流表A2（量程2mA，电阻R A2约为50Ω）D．滑动变阻器R1（0～20Ω，额定电流1A）E．电阻箱R2（0～999.9Ω）F．开关S一只、导线若干①该同学连接成如图2所示电路，则电流表应该选用_____(填A1或A2)②闭合开关后，发现调整滑动变阻器滑动头P时，电流表和电压表示数变化范围都很小，经检查各元件完好，则可能是标号为______处导线断路(2)另一个同学没有利用电流表，只是用了前面所给的其它器材，进行了测定该手机电池电动势和内电阻的实验①请帮他在虚线框内画出实验电路图______．并标注应该使用的可变电阻为R1还是R2．②根据第二个同学测量数据，画出了电压表示数U与外电阻R之间的关系图像如图3所示．则他测量的该电池电动势为_________V，内电阻为______Ω(保留2位有效数字) 四、解答题11．如图所示，在光滑水平而上放置一个匀质木块A，厚度为l，质量为19m，并用销钉固定．一颗质量为m的子弹以水平速度v0射入木块，恰好能从A中穿出，子弹在木块中受到的阻力可视为恒力，且子弹可视为质点．(1)求子弹在木块中受到的阻力大小；(2)取下销钉，同样的子弹仍以水平速度v0射入木块，求子弹能打入木块的深度．12．如图所示，线圈abcd的面积是0.05m2，共100匝，线圈电阻为1Ω，外接电阻R=9Ω，匀强磁场的磁感应强度1Bπ=T，当线圈以300r/min的转速匀速旋转时，求：(1)若从图示位置开始计时，写出线圈中感应电动势的瞬时值表达式；(2)从中性面开始计时经过90°通过电阻R的电荷量；(3)1min电路产生热量.参考答案1．B【解析】单摆做受迫振动，振动频率与驱动力频率相等；当驱动力频率等于固有频率时，发生共振，则固有频率为0.5Hz，周期为2s，故A错误；由图可知，共振时单摆的振动频率与固有频率相等，则周期为2s．由公式2T=，可得L≈1m，故B正确；若摆长增大，单摆的固有周期增大，则固有频率减小，故C错误；若把该单摆移到月球上，重力加速度减小，则周期增大，频率减小，所以在月球上该单摆的共振曲线的峰将向左移动，故D错误．所以B 正确，ACD错误．2．B【详解】A．在运动员下落h的过程中，重力势能减少了mgh，故A错误；B．根据牛顿第二定律得，物体所受的合力为F合=ma=45mg则根据动能定理得，合力做功为45mgh，则动能增加了为45mgh，故B正确；C．合力做功等于重力做功与阻力做功的代数和，因为重力做功为mgh，则克服阻力做15 mgh，故C错误；D．重力势能减少了mgh，动能增加了45mgh，故机械能减少了15mgh，故D错误；故选B．3．A【详解】试题分析：当MN匀速运动时，MN相当于电源．由右手定则判断电流的方向．再根据闭合电路欧姆定律求出MN两端电压的大小．当MN沿导轨方向以速度v匀速运动运动时，由法拉第电磁感应定律得：E BLv=，由闭合电路欧姆定律可得：MN两端电压大小为122EU R BLvR==，由右手定则可知流过固定电阻R的感应电流由b到d．故选A 4．D【解析】A 项：在t=0.01s 的时刻，电动势为0，则为中性面，穿过线圈磁通量最大，故A 错误；B 项：由图可知，电动势的最大值为，周期为0.02s ，则瞬时电动势的表达式为2sin()()m e E t t V Tππ==，故B 错误； C 项：电压表的示数为外阻分压：96 5.410R U E V V R r ==⨯=+，故C 错误； D 项：通过的电流为0.6E I A R r ==+，故D 正确． 点晴：在中性面感应电动势最小，磁通量最大；根据图象可知交流电的最大值以及周期等物理量，然后进一步可求出其瞬时值的表达式以及有效值等．5．AC【详解】A ．根据速度图象的斜率等于加速度，由数学知识可以看出，从A 点运动到D 点的过程中带电粒子的加速度先减小后增大再减小，则其所受的电场力先减小后增大再减小，由qE a m =知，电场强度E 先减小后增大再减小，即有A 处的场强强度最大，故A 正确；B ．由于带电粒子的电性未知，无法判断电场方向，也就不能判断电势高低，故B 错误；C ．由图看出，从A 点运动到B 点的过程中带电粒子的速度增大，动能增大，则由能量守恒定律得知，其电势能减小，粒子在A 点的电势能大于在B 点的电势能，故C 正确；D ．从A 点运动到C 点的过程中与从C 点运动到D 点的过程中，由图看出kAC kCDE E ∆=-∆，所以AC CD W W =-，由W U q =可得AC CD U U =-，故D 错误； 故选AC ．【点睛】速度时间图象的斜率等于加速度，由数学知识判断带电粒子的加速度，即可判断电场力和场强；因带电粒子的电性未知，无法判断电场方向，不能判断电势高低；根据能量守恒判断电势能的大小，根据W U q=确定两点的电势差． 6．BCD【详解】A ．由右手定则可得，流过导体棒的电流方向为b a →，故A 错误；B ．由01B S q R R ∆∆=+投影可知，沿圆弧轨道上升和回落时S ∆相同，故q ∆相同，故B 正确；C ．若导体棒停在圆弧上，对导体棒受力分析，仅受到重力和圆弧给的支持力，无法平衡，则导体棒一定能回到水平导轨，故C 正确；D ．导体棒能回到水平轨道，回到水平轨道时还具有动能，导体棒落回到圆弧轨道上端时所具有的机械能为212E mgr mv =+ 根据能量守恒，所以电路产生的热量小于E ，故D 正确；故选BCD ．7．AB【详解】机械能等于动能与重力势能之和，甲加速上升，其动能和重力势能均增加，所以机械能增加，故A 正确；甲和乙组成的系统机械能守恒，由机械能守恒定律得：2211222222l l mg mg mv mv =++⨯，则解得：v =，乙动能增加量为211223mv mgl ⨯=，重力势能减小22l mg mgl =，所以机械能减小23mgl ，故B 正确；由于乙加速下降，则轻绳的拉力小于重力，因此轻绳对乙所的功在数值上小于乙的重力所做的功，故C 错误；甲动能增加量为：21126k E mv mgl ∆==，甲的重力所做的功在数值上等于12mgl ，由此可知甲的重力所做的功在数值上大于甲增加的动能，故D 错误．所以AB 正确，CD 错误．8．BD【解析】【详解】由于在霍尔器件的上下面之间加一定的电压，形成电流，当永久磁铁的上下端分别为N 、S 极时，磁场与电子的移动方向平行，则电子不受洛伦兹力作用，那么霍尔器件不能输出控制车速的电势差，故A 错误；当按图甲顺时针转动把手，导致霍尔器件周围的磁场增加，那么霍尔器件输出控制车速的电势差增大，因此车速变快，故B 正确；结合图乙的示意图，那么永久磁铁的N 、S 极可能在左、右侧面，或在前、后表面，因此从霍尔器件输出控制车速的电势差，不一定在霍尔器件的左右侧面，也可能在前后表面，故C 错误；当霍尔器件的上下面之间所加电压正负极性对调，从霍尔器件输出控制车速的电势差正负号相反，但由图丙可知，不会影响车速控制，故D 正确．点睛：考查霍尔元件的工作原理，掌握“霍尔转把”结构图，理解霍尔器件能输出控制车速的电势差与什么因素有关，注意图丙中电势差的正负，不会影响车速．9．C2F ma mg- 【详解】(1)[1]A ．实验目的是测量滑块和长木板之间的动摩擦因数，不需要平衡摩擦力，故A 错误； BD ．用力传感器测量绳子拉力大小，可得滑块收到的拉力，不需要使砂和砂桶的总质量远小于滑块质量，也不需要用天平测砂和砂桶的总质量，故BD 错误；C ．打点计时器必须接交流电源，故C 正确.故选C.(2)[2]根据牛顿第二定律 2F μmg ma -=得μ＝2F ma mg- 10．1A ③ 3.5(3.4~3.6) 10(9.5~10)【详解】(1)[1]待测电阻阻值约为200Ω，滑动变阻器最大阻值为20Ω，滑动变阻器采用分压接法；电路最大电流约为：3.718.5mA 200E I R === 所以电流表选A 1． [2]闭合开关后，发现调整滑动变阻器滑动头P 时，电流表和电压表示数变化范围都很小，经检查各元件完好，是变阻器串联接入电路中，所以可能是标号为③处导线断路．(2)[3]实验中没有电流表，只利用一只电压表，还需要知道外电阻的阻值，所以应在选择电阻箱R 2，电路如图所示：[4][5]在闭合电路中，电源电动势：U E U Ir U r R=+=+变形得： 111r U E E R=+⋅ 由图象可知，图象截距10.28b E== 解得： 3.6V E =0.850.5 2.80.20.075r k E -===- 联立以上可得： 10r =Ω11．（1）202m f l=v （2）1920d l = 【详解】（1）子弹恰好击穿A ，根据动能定理可得20102f l m -=-v 解得202m f l=v （2）由题意得子弹与木块最后达到共速，由系统动量守恒有01(19)m m m =+v v损失的动能2201112022E m m ∆=-v v 根据功能关系有fd E =∆联立可得子弹射入木块的深度1920d l = 12．（1）e =E m cos wt =50cos10πt （V ） （2）12πC （3）7500J 【解析】 试题分析：从线圈处于中性面开始计时，线圈中感应电动势的瞬时值表达式e =E m sinωt ；根据q n r R∆Φ=+求出电荷量；由焦耳定律求出热量． （1）角速度：ω=2πn =2π×5=10πrad/s 最大值为：11000.051050m E NBS V ωππ==⨯⨯⨯=从线圈与中性面垂直开始计时，感应电动势的瞬时表达式为：5010m e E cos t cos tV ωπ== （2）磁通量变化量为：2110.050.0159BS Wb Wb π∆Φ=Φ-Φ==⨯= 根据法拉第电磁感应定律得：E N t∆Φ=∆ 根据欧姆定律得：E I R r=+ 电量为：q I t =∆ 联立解得：0.159q C =(3)根据焦耳定律得1分钟电路产生热量为：22607500E Q t J J R r ===+ 点睛：本题主要考查了对交流发电机原理的理解能力．对于交流电表，显示的是交流电的有效值．瞬时值表达式要注意计时起点，不同的计时起点表达式的初相位不同．。
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泸县二中高2021年A 部2021年春期期中考试
化 学 试 题
可能用到的相对原子质量：H —1 C —12 O —16 N —14 Na —23 Ag —108
第Ⅰ卷 选择题（共48分）
一、选择题（本题包括8小题，每小题只有一个选项符合题意；每小题6分，共48分）
1．化学与社会、生活密切相关，下列说法错误的是
A ．市场上假酒销售时有发生，假酒的有毒成分主要是甲醇
B ．由石油分馏可获得汽油、煤油、柴油等，可用作燃料和煤油还可保存少量金属钠
C ．甲醛水溶液可以用来作食品防腐剂
D ．遵守《保护臭氧层维也纳公约》，限制生产和销售氟里昂可减少对大气臭氧层的破坏
2．根据有机物的系统命名原则，下列命名正确的是
A ． 间三甲苯
B ．CH 3CH(
C 2H 5)CH 2CH 2CH 32-乙基戊烷
C ．CH 3CH （CH 3）CH 2COOH 2-甲基丁酸
D ．
CH 3C CH 3CH 3CH 3OH
3,3-二甲基-2-丁醇
3．美国圣路易斯大学研制了一种新型的乙醇电池，用质子（H +）溶剂，在200o C 左右时供电。
电池总反应为：C 2H 5OH +3O 2＝2CO 2 +3H 2O ，电池示意如右图，下列说法正确的是
A ．a 极为电池的正极
B ．电池工作时电子由b 极沿导线经灯泡再到a 极
C ．电池正极的电极反应为：4H + + O 2 + 4e ＝2H 2O
D ．电池工作时，1mol 乙醇被氧化时就有6mol 电子转移
4．迷迭香酸是从蜂花属植物中提取得到的酸性物质，迷迭香酸的分子结构为：
下列叙述正确的是
A ．迷迭香酸属于芳香族化合物，分子式C 18H 18O 8
B ．迷迭香酸含有碳碳双键、羟基、羧基、苯环和酯基的结构
C ．1 mol 迷迭香酸最多能和含6 mol Br 2的浓溴水发生反应
D ．1 mol 迷迭香酸最多与含5 mol N aOH 的水溶液完全反应
5．BHT （Butylated Hydroxy Toluene ）是一种常用的食品抗氧化剂，合成方法有如下两种：
（BHT ）CH 3OH CH 3OH C(CH 3)3(CH 3)3C 方法二(CH 3)3COH/浓H 2SO 4
(CH 3)2C ＝CH 2/稀H 2SO 4
方法一
下列说法正确的是
A ．CH 3
OH 属于芳香烃 B ．CH 3OH 与BHT 互为
同系物
C ．BHT 久置于空气中不会被氧化
D ．两种方法的反应类型都是加成反应 6．利用下列实验装置进行的相应实验，不能达到实验目的的是
A ．图1所示装置可制取乙炔
B ．图2所示装置可分离乙酸乙酯和醋酸钠的水溶液
C ．图3所示装置可制取乙烯并验证其易被氧化
D ．图4所示装置可说明浓H 2SO 4具有脱水性、强氧化性，SO 2具有漂白性、还原性
7．已知25℃时有关物质的电离平衡常数： 弱酸 CH 3COOH 苯酚 H 2CO 3
下列叙述错误的是
A．等物质的量浓度的各溶液pH关系为：
pH（C6H5ONa）＞pH（Na2CO3）＞pH（NaHCO3）＞pH（CH3COONa）B．向苯酚钠溶液中通入少量CO2气体反应为：C6H5O–+H2O + CO2 →C6H5OH +HCO3—C．等物质的量浓度的苯酚稀溶液与NaOH稀溶液等体积混合后溶液中：
c（Na+）＞c（C6H5O–）＞c（OH–）＞c（H+）
D．NaHCO3和Na2CO3混合液中，一定有c（Na+）+ c（H+）＝c（OH–）+ c（HCO3–） +2c（CO32–）
8．在标准状况下，由甲烷、甲醛和乙烷组成的11.2L混合气体完全燃烧后，生成15.68L相同状况下的CO2气体。
则混合气体中乙烷的体积分数为
A．20% B．40% C．60% D．80%
第Ⅱ卷非选择题（共52分）
二、填空题（本大题包括4个题，共52分。
）
9．（8分）某烃A 0.2 mol 在氧气中完全燃烧后，生成CO2、H2O各1.2 mol。
回答下列问题：
（1）烃A的分子式为。
（2）若烃A不能使溴水褪色，但在一定条件下能与氯气发生取代反应，其一氯取代物只有一种，则烃A的结构简式为。
（3）若烃A能使溴水褪色，在催化剂作用下，与H2加成生成3-甲基戊烷，烃A可能的结构有
种（包括顺反异构）。
（4）若烃A能使溴水褪色，在一定条件下与HBr加成，其加成产物只有一种，烃A可能的结构简简式有。
10．（14分）如下图装置所示，C、D、E、F、X、Y都是惰性电极，甲、乙中溶液的体积和浓度都相同（假设通电前后溶液体积不变），A、B为外接直流电源的两极。
将直流电源接通后，F极附近呈红色。
请回答：
（1） B极是电源的（填电极名称），一段时间后丁中X极附近的颜色逐渐变浅，Y 极附近的颜色逐渐变深，这表明，在电场作用下向Y极移动。
（2）乙装置中发生的总反应离子方程式为。
（3）若甲、乙装置中的C、D、E电极均只有一种单质生成时，对应单质的物质的量之比为。
（4）现用丙装置给铜件镀银，则H应该是（填“镀层金属”或“镀件”）。
当乙中溶液的pH是13时（此时乙溶液体积为500 mL），丙中镀件上析出银的质量为g。
（5）若将C电极换为铁，其他装置都不变，则甲中发生总反应的离子方程式是：。
11．（12分）苯甲酸广泛应用于制药和化工行业，某同学尝试用甲苯的氧化反应制备苯甲酸，反应原理：
实验方法：一定量的甲苯和适量的KMnO4溶液在100℃反应一段时间后停止反应，按如下流程分离出苯甲酸和回收未反应的甲苯。
已知：苯甲酸相对分子质量122 ，熔点122.4℃，在25℃和95℃时溶解度分别为0.3 g 和6.9 g；纯净固体有机物一般都有固定熔点。
（1）操作Ⅰ为，操作Ⅱ为。
（2）无色液体A是，定性检验A的试剂是。
（3）测定白色固体B的熔点，发现其在115℃开始熔化，达到130℃时仍有少量不熔，该同学检验该白色固体B是苯甲酸与KCl的混合物，则进一步提纯白色固体B应采用的方法是。
（4）白色固体B产品的纯度测定：称取1.220 g产品溶解在甲醇中配成100 mL溶液，移取
25.00 mL溶液，滴定消耗KOH的物质的量为2.40 ×10—3 mol，该产品中苯甲酸质量分
数为
（保留两位有效数字）。
12．（18分）以石油裂解产物丙烯为原料合成一些新物质的路线如下。
其中A、B、C、X、Y、Z、W、H均为链状化合物，A、Z均能发生银镜反应，C中不含
甲基，1mol C可与足量钠反应生成22.4 L H2（标准状况）。
请回答下列问题：
（1）A中所含官能团的名称为，B的结构简式为。
（2）填反应类型：A→B，C＋W→H 。
（3）写出X→Y反应的化学方程式为：。
（4）写出A与银氨溶液反应的化学方程式为：。
（5）写出C＋W→H的化学方程式为：。
（6）符合下列条件分子式为C4H10O2的同分异构体有种，并写出其中核磁共振氢谱有
3个吸收峰且吸收峰面积比为2∶2∶1的结构简式。
①与C互为同系物，②若分子中有两个羟基不能连在同一个碳原子上。
泸县二中高2021年A部2021年春期期中考试
化学试题答案及评分标准
一、选择题
1．C 2．D 3．C 4．B 5．B 6．C 7．A 8．B
二、非选择题（每空均为2分。
）
9．（1）C6H12 （2）（写结构简式同样给分，写名称不给分）。
（3）4种（4）CH3-CH2-CH＝CH-CH2-CH3、（CH3）2C＝C（CH3）2（其他书写正确给分）。
10．（1）负极Fe（OH）3胶体粒子带正电荷（如为Fe（OH）3胶体带正电荷
不给分。
）
（2）2Cl—+2H2O Cl2↑+H2↑+2OH—（未写条件扣1分，未配平不给分）
（3）1∶2∶2 （4）镀件 5.4g （5）Fe+Cu2＋＝Fe2＋+Cu 11．（1）分液蒸馏
（2）甲苯（写结构简式也给分）酸性KMnO4溶液
（3）重结晶法（4）96%
12．（1）碳碳双键、醛基（写结构简式不给分）
HOCH2-CH2-CHO（结构简式有错不给分）
（2）加成反应取代反应（或酯化反应）
（3）CH3-CH2-CH2Br+NaOH CH3-CH2-CH2OH+NaBr
（4）CH2＝CH-CHO+2Ag（NH3）2OH CH2＝CH-COONH4+2Ag+3NH3+H2O （5）2CH3CH2COOH+HOCH2CH2CH2OH
CH3CH2COOCH2CH2CH2OOCCH2CH3+2H2O
（以上条件未写扣1分，结构简式有错不给分）
（6）6种 HOCH2CH2CH2CH2OH。