1000 LED factories
高考英语句子结构复杂句分析练习题30题
高考英语句子结构复杂句分析练习题30题1<背景文章>In today's rapidly evolving technological landscape, a revolutionary new technology has emerged that is set to transform multiple industries. This technology, known as quantum computing, operates on principles that are vastly different from traditional computing.Quantum computing harnesses the power of quantum mechanics to perform calculations at speeds unimaginable with classical computers. At the heart of quantum computing is the qubit, a quantum version of the bit used in traditional computing. While a bit can be in one of two states, 0 or 1, a qubit can exist in multiple states simultaneously, thanks to a phenomenon called superposition.This unique property of qubits allows quantum computers to process vast amounts of information simultaneously. For example, in solving complex optimization problems, quantum computing can explore multiple solutions simultaneously, significantly reducing the time required to find the optimal solution.Another key aspect of quantum computing is entanglement. Entangled qubits are connected in such a way that the state of one qubit is instantly affected by the state of another, regardless of the distance betweenthem. This property enables quantum computers to perform certain calculations with remarkable efficiency.The applications of quantum computing are wide-ranging. In the field of cryptography, quantum computers have the potential to break existing encryption methods, forcing the development of new, quantum-resistant encryption techniques. In drug discovery, quantum computing can accelerate the process of simulating molecular interactions, leading to the development of more effective drugs. Additionally, quantum computing can improve weather forecasting, optimize logistics and supply chain management, and enhance financial modeling.As quantum computing continues to advance, it is likely to have a profound impact on our lives. However, there are still many challenges to overcome. One of the major challenges is the need for extremely low temperatures and stable environments to maintain the delicate quantum states. Another challenge is the development of error correction techniques to ensure the accuracy of quantum calculations.Despite these challenges, researchers and engineers around the world are working tirelessly to unlock the full potential of quantum computing. With continued investment and innovation, quantum computing may soon become a mainstream technology, changing the way we live and work.1. The main difference between a qubit and a bit is that a qubit _____.A. can only be in one stateB. can exist in multiple states simultaneouslyC. is used in traditional computingD. is slower than a bit答案：B。
初三英语完形填空单选题40题
初三英语完形填空单选题40题1. The ______ of the new discovery has attracted the attention of many scientists.A. importanceB. improvementC. impressionD. information答案：A。
解析：importance表示重要性，新发现的重要性会吸引科学家的注意；improvement是改进、提高，与语境不符；impression 是印象，新发现的印象不通顺；information是信息，新发现的信息本身不能直接说吸引很多科学家的注意，而是其重要性才会，所以A正确。
2. There are some ______ between the two cultures, such as different festivals and eating habits.A. differencesB. difficultiesC. distancesD. directions答案：A。
解析：differences表示差异，两种文化之间有一些差异，如不同的节日和饮食习惯，符合语境；difficulties是困难，这里不是说困难；distances是距离，与文化语境无关；directions是方向，也不符合，所以A正确。
3. The young man has a great ______ for painting and he wants to bea famous painter.A. giftB. goalC. gradeD. guide答案：A。
解析：gift有天赋的意思，这个年轻人有绘画的天赋，他想成为著名画家；goal是目标，这里强调的是天赋而非目标；grade 是年级、等级，与语境不符；guide是导游、指导，也不符合，所以A 正确。
4. We should ______ the old traditions and pass them on to the next generation.A. protectB. provideC. produceD. prevent答案：A。
中考全球环境与气候变化英语阅读理解25题
中考全球环境与气候变化英语阅读理解25题1<背景文章>Global warming has become one of the most pressing issues in the world today. There are several main reasons for global warming. First of all, the burning of fossil fuels such as coal, oil, and gas releases a large amount of greenhouse gases like carbon dioxide into the atmosphere. These greenhouse gases trap heat from the sun and cause the earth's temperature to rise. Secondly, deforestation also contributes to global warming. Trees play a crucial role in absorbing carbon dioxide, and when large areas of forests are cut down, less carbon dioxide can be absorbed.The impacts of global warming are far - reaching. Sea - level rise is a significant consequence. As the temperature increases, glaciers and ice caps melt, adding more water to the oceans. This not only threatens low - lying islands and coastal areas but also disrupts the habitats of many marine organisms. Moreover, extreme weather events such as heatwaves, droughts, and floods are becoming more frequent and intense. These events can cause great damage to agriculture, infrastructure, and human lives.In response to global warming, various measures have been proposed and implemented. On an individual level, people can reduce their carbon footprint by conserving energy at home, such as turning off lights when notin use, using energy - efficient appliances, and reducing waste. At the national level, many countries are investing in renewable energy sources like solar, wind, and hydro power. For example, some European countries have set ambitious goals to increase the proportion of renewable energy in their energy mix.However, different countries have different attitudes towards global warming. Developed countries, which have historically emitted a large amount of greenhouse gases, generally have more resources and technology to address this issue. They often take the lead in promoting international cooperation and setting emission reduction targets. For example, the United States, although its policies have fluctuated in recent years, has also made efforts in some areas such as promoting clean energy research. Developing countries, on the other hand, face the challenge of economic development while also dealing with global warming. They need to balance economic growth and environmental protection. Some developing countries are actively seeking international support and technology transfer to develop in a more sustainable way.1. What is the main cause of global warming according to the article?A. The use of renewable energy.B. The burning of fossil fuels and deforestation.C. The conservation of energy at home.D. The development of developing countries.答案：B。
高三名词性从句高级分析练习40题
高三名词性从句高级分析练习40题1<背景文章>The story of Dr. Smith's remarkable discovery is one that has captivated the scientific community. What started as a simple curiosity led to a groundbreaking exploration. Dr. Smith had always wondered __1__ the mysteries of the universe could be unlocked. This question drove him to embark on a journey of research and experimentation.He spent countless hours in the laboratory, pondering __2__ the key to his discovery might lie. As he delved deeper into his work, he realized that the answer might be found in a previously overlooked area of study.Dr. Smith's colleagues were initially skeptical about his ideas, but he was determined to prove __3__ he was on the right track. He presented his theories at conferences and engaged in lively discussions with other scientists, all the while refining his understanding of __4__ his discovery could have far-reaching implications.Finally, after years of hard work, Dr. Smith made the discovery that would change the course of scientific history. He had uncovered a new phenomenon that shed light on __5__ many of the universe's mysteries might be solved.1. A. how B. what C. that D. which2. A. where B. when C. why D. that3. A. that B. what C. which D. how4. A. that B. what C. how D. which5. A. how B. what C. that D. which答案：1. A；2. A；3. A；4. C；5. A。
LED灯单位知识
热力学温度：开[尔文]（K）开尔文英文是 Kelvin 简称开，国际代号K，热力学温度的单位。
开尔文是国际单位制（SI）中7个基本单位之一，以绝对零度（0K）为最低温度，规定水的三相点的温度为 273.16K，1K等于水三相点温度的1/273.16。
特别需要注意的是：水的三相点不是冰点，冰点与气压和水中的溶质有关（比如空气），三相点只与水本身的性质有关，是恒量。
由此推算出的1K的大小与1摄氏度大致相等，且水在101.325Pa下的熔点大约为273.15K，故摄氏温标与国际温标之间的换算大约为Tc=Tk-273.15。
开尔文是为了纪念英国物理学家Lord Kelvin而命名的。
注明：国际单位制=International System of Units热力学温度是国际单位制中七个基本物理量之一，其单位开尔文(符号K)定义为水三相点热力学温度的1／273．16。
可见，水三相点既是热力学温度的唯一基准点，也是1990年国际温标(ITs 一90)定义的最基本的、极其重要的固定点。
水三相点是水的固、液、汽三相平衡共存时的温度(图l1，其值为273．16K (0．01℃)。
它是在一个密封的装有高纯度水(水的同位素成分相当于海水)的玻璃容器——水三相点瓶内复现的。
Material: PC+ABS/al + PC/PCPC: Polycarbonate聚碳酸酯 ABS: Acrylonitrile Butadiene StyreneAL: AluminumLED : Light Emitting Diode (display) 发光二极管(显示)Most digital read-outs on laboratory instruments, calculators and watches use LED display. 实验仪器、计算机、手表的数字读出大多是二极管显示Power ratio: 90lm/wLm: lumen 流明(光束的能量单位)lm是光通量的单位，通俗说就是度量一个光源发出多少光的单位lm/w是光电效率的表征，表示消耗电功率1w发出多少光能。
初三英语历史词汇单选题30题
初三英语历史词汇单选题30题1. In ancient Rome, a ______ was a large building used for public baths, exercise, and socializing.A. forumB. basilicaC. thermaeD. colosseum答案：C。
解析：thermae在古罗马语境中是指大型的公共浴场，用于洗浴、锻炼和社交等活动。
forum是古罗马的广场，主要用于商业、政治和社交集会等；basilica是一种长方形会堂建筑，用途多样；colosseum是罗马斗兽场，用于角斗等娱乐活动。
2. The ______ in ancient Greece was a place where citizens could discuss politics and make decisions.A. agoraB. acropolisC. pantheonD. oracle答案：A。
解析：agora在古希腊是公民讨论政治和做决策的地方。
acropolis是卫城，是城市的防御性建筑；pantheon是万神殿；oracle是神谕，通常指传达神的旨意的地方或人。
3. Ancient Roman ______ were often made of marble and depicted gods, heroes or important events.A. mosaicsB. sculpturesC. frescoesD. manuscripts答案：B。
解析：sculptures雕塑在古罗马常常由大理石制成，用来描绘神、英雄或重要事件。
mosaics是马赛克；frescoes是壁画；manuscripts是手稿。
4. In ancient Greece, an ______ was a person who was considered to have a special connection with the gods and could predict the future.A. athleteB. philosopherC. oracleD. poet答案：C。
介绍工厂的文案英语作文
介绍工厂的文案英语作文英文回答：A factory is an industrial facility where goods are produced in large quantities using machinery and labor. Factories have played a pivotal role in the economic development of nations and have enabled mass production, which has made goods and services more affordable and accessible.Factories can specialize in producing a wide range of products, from textiles to electronics, cars to chemicals. They typically operate on a large scale, using assembly lines and advanced technology to maximize efficiency and productivity. Workers in factories perform various tasks, including operating machinery, assembling products, and performing quality control checks.The layout and design of factories are carefully planned to optimize workflow and minimize waste. They oftenhave designated areas for receiving raw materials, production, assembly, inspection, and storage. Factories may also have dedicated spaces for employee facilities,such as cafeterias, locker rooms, and offices.Factories play a crucial role in supply chains and are often interconnected with other businesses and industries. They may source raw materials from suppliers and distribute finished products to distributors, retailers, or directlyto consumers. Factories are also important for research and development, and many invest in innovation to improve their production processes and products.In recent years, factories have faced challenges suchas globalization, automation, and environmental concerns. Globalization has increased competition and led to the relocation of factories to countries with lower labor costs. Automation has reduced the need for human workers in some factories, leading to job losses. And environmentalconcerns have prompted factories to adopt more sustainable practices and reduce their carbon footprint.Despite these challenges, factories continue to bevital to the global economy. They provide jobs, drive innovation, and meet the growing demand for goods and services. As technology continues to advance, factories are evolving to become more efficient, automated, and environmentally friendly.中文回答：工厂是一种工业设施，利用机器和劳动力大量生产商品。
中考英语气候变化应对单选题40题
中考英语气候变化应对单选题40题1. The main cause of global warming is the increase in _______ gases.A. oxygenB. nitrogenC. greenhouseD. hydrogen答案：C。
解析：全球变暖的主要原因是温室气体的增加。
选项A氧气、选项B氮气、选项D氢气都不是导致全球变暖的主要气体。
而greenhouse gases（温室气体），如二氧化碳等的增加会导致地球温度上升，引起全球变暖。
2. Global warming may lead to _______.A. cooler summersB. more icebergsC. rising sea levelsD. less rainfall in all areas答案：C。
解析：全球变暖可能会导致海平面上升。
因为温度升高会使冰川融化，从而使海平面上升。
选项A全球变暖会使夏天更热而不是更凉爽；选项B全球变暖会使冰川融化，冰堡会减少而不是增多；选项D全球变暖会使一些地区降雨增多，一些地区降雨减少，而不是所有地区降雨都减少。
3. Which of the following is a major source of greenhouse gases?A. Wind power plantsB. Solar energy systemsC. Burning of fossil fuelsD. Hydroelectric power stations答案：C。
解析：燃烧化石燃料是温室气体的一个主要来源。
像煤、石油和天然气等化石燃料燃烧时会释放大量的二氧化碳等温室气体。
而选项A风力发电厂、选项B太阳能系统、选项D水力发电站都是清洁能源，不会产生大量温室气体。
4. Climate change can affect _______.A. only plantsB. only animalsC. both plants and animalsD. neither plants nor animals答案：C。
植物工厂内LED光调控在果树栽培中应用的研究进展
118㊀㊀农机使用与维修2024年第4期植物工厂内LED 光调控在果树栽培中应用的研究进展王文明1,2,潘丽芹1,2,徐森富1,2(1.台州科技职业学院,浙江台州318020;2.台州市园艺生物技术重点实验室,浙江台州318020)摘㊀要:相比露天栽培和大田生产,植物工厂具有不受气候条件影响㊁自动化程度高㊁空间单位面积利用率高㊁可周年不间断连续生产等突出优点㊂该文重点阐述和分析了植物工厂内发光二级管(LED )光调控在果树栽培中的应用,从光质㊁光周期㊁光照度三个角度出发,总结LED 光调控对果树生长发育与生理生化的影响,并提出存在的问题,展望了未来的发展趋势㊂关键词:植物工厂;LED 光调控;光照;环境控制;果树栽培中图分类号:S233.4㊀㊀㊀㊀㊀㊀㊀㊀文献标识码:Adoi :10.14031/ki.njwx.2024.04.034Research Progress of LED Light Regulation in Plant Factories for Fruit Tree CultivationWANG Wenming 1,2,PAN Liqin 1,2,XU Senfu 1,2(1.Taizhou Vocational College of Science and Technology,Taizhou 318020,China ;2.Taizhou Key Laboratory of Horti-cultural Biotechnology,Taizhou 318020)Abstract :Compared with open -air cultivation and field production,plant factories have outstanding advantages such as independent of climatic conditions,high degree of automation,high utilization of space unit area,and continuous pro-duction on an annual basis.The article focuses on the research progress of LED light regulation in fruit tree cultivation in plant factories,summarizes the effects of LED light regulation on fruit tree growth and development and physiology and biochemistry from three perspectives of light quality,photoperiod and light intensity,and presents the problems and prospects for future development trends.Keywords :plant factory;LED light control;light illumination;environmental control;fruit tree cultivation基金项目:农业农村部园艺作物种质资源利用重点实验室开放课题(NYZS2023006);台州市科技局农业科技计划项目(23nya20)作者简介:王文明(1991 ),男,哈尔滨人,博士,讲师,研究方向为智能农机机械装备㊂通讯作者:徐森富(1969 ),男,浙江仙居人,硕士,教授,研究方向为现代园艺技术与装备㊂0㊀引言植物工厂是通过设施内高精度环境控制实现农作物周年连续生产的高效农业系统,可实现对植物生长的温度㊁湿度㊁光照㊁二氧化碳浓度以及营养液等环境因子进行高精度自动化控制,使设施内植物的生长发育不受或很少受自然条件制约,从而实现周年不间断生产㊂近年来,随着信息技术的不断发展,植物工厂技术已广泛应用于种苗㊁蔬菜㊁水果㊁花卉㊁中药材等作物的规模化生产中,在果树栽培领域也应用广泛,已成为我国果业发展的新业态,可扩大优良果品栽培区域,延长鲜果供应期,对我国果业发展具有重要意义㊂本文从光质㊁光周期和光照度三个角度综述了植物工厂中LED 光控制在果树栽培中的应用,旨在为果树设施栽培的研究提供参考㊂1㊀LED 光调控技术植物工厂使用的光照条件包括光质㊁光照度和光周期等参数,这些参数对果树生长发育至关重要,是设施果树栽培运行的关键因素之一㊂光调控技术利用LED 光源进行综合调控,满足果树在生长发育不同时期对光量的需求,突破自然环境限制,实现精确供光㊂与传统照明条件不同,LED 作为冷光源具有体积更小㊁发热少㊁效率更高㊁波长可调性更强等优点,广泛应用于近年来的设施栽培中㊂1.1㊀光质对果树生长和品质的调控作物光合作用以红橙光和蓝紫光为吸收峰值区域,光谱能量分布是影响植物生理过程的重要属性㊂不同波段范围内的光具有不同的生物学效应,不同光质对作物细胞分裂和器官分化的作用也不同㊂研究发现,即使在同一作物的不同器官培养中,光质也会表现出明显差异[1-2]㊂短波光不利于葡萄试管苗的生长和生根,而长波光则有利于难生2024年第4期农机使用与维修119㊀根的试管苗[3]㊂对于香椿苗来说,红光处理可以促进其株高㊁鲜质量㊁干质量和可溶性糖含量的增加,蓝光处理则可以提高叶绿素含量和可溶性蛋白质含量[4]㊂另外,张斌斌等[5]研究表明,通过调节光的颜色可对红叶桃产生不同影响,红㊁黄色可以改善叶片的红色色泽,而蓝㊁绿色会使叶片偏向绿色,白色过滤膜则效果较差㊂陈光彩等[6]研究表明,单色红光处理可增加香蕉组培苗的根数和根长,低蓝光处理有助于根的伸长,而红蓝光混合(80%R+ 20%B)处理则能有效促进香蕉组培苗的溶糖和光合色素的积累㊂黄文静等[7]研究显示,LED红光和蓝光分别能促进火龙果幼苗植株的增高和茎围增大㊂当采用复合红蓝光(6ʒ4)时,火龙果出苗时间最短,增殖系数高,生根率达到100%㊂马绍英等[8]指出,在LED红+蓝光下,葡萄试管苗的增殖倍数㊁冠鲜质量㊁根鲜质量㊁叶面积㊁叶绿素含量㊁净光合速率和叶绿荧光参数均最高;胡萝卜素含量则最低㊂余阳等[9]通过对嫁接的 夏黑 葡萄进行不同光质处理发现,红光处理有利于提高叶绿素含量和过氧化物酶(POD)[1]活性,而蓝光处理则有助于提升超氧化物歧化酶(SOD)活性和降低丙二醛(MDA)含量,光质还可以明显促进 夏黑 葡萄的生长㊂通过以上研究可知,不同的LED光谱对果树体内功能性化学物质的影响也会各不相同㊂这表明光质对果树生长发育的调节具有复杂性,并且每个果树品种对光的需求不同,因此会呈现出不同光生物学效应㊂红光可以促进植物形态变化和碳水化合物的合成,同时增加酶活性;而蓝光则可以促进植物营养成分的累积㊂因此,采用合理的红蓝复合光可以促进植物形态建成,实现更好的生长效果㊂1.2㊀光照度对果树生长和品质的调控植物的生长发育和营养物质含量受光照度影响,过弱或过强的光照都会产生不利影响㊂适宜的光照度能稳定增加植物的光合速率和蒸腾速率,提高物质生产能力和生长发育速度㊂尹魁林等[10]研究表明,对移栽前的冬枣试管苗进行渡光处理,可有效提高其栽植成活率㊂对于云南蓝果树幼苗来说,适度遮阴能促进幼苗个体发育,在光照度为60%时最为适宜,过低或过高的光照度均不利于其生长发育和光合作用[11]㊂马宗桓[12]指出遮光处理也对果实的品质有一定影响,不同遮光处理下果实中单宁及花青素含量降低,酒石酸㊁苹果酸和乳酸含量增加㊂果袋透光率小于50%时单宁和类黄酮物质的合成明显受到抑制,且果实的转色时间会延迟㊂综合来看,合理的光照度可以促进果树生长并增加干物质量积累㊂在相同光照度下,使用红蓝光混合可以促进果实和植株初级代谢产物的积累和生理变化,并通过光量调节营养品质指标㊂不同光照度下果树活性成分存在明显变化,特别是在高光照度下,应适当遮挡植株关键部位,以防止高光照度对叶片器官的损伤和光合作用的破坏㊂1.3㊀光周期对果树生长和品质的调控光周期是光环境调控中的重要属性,通过匹配果树育苗体内时钟周期,可获得更多光合作用优势㊂通过对幼苗光周期的调控,可调节其营养物质的积累,有助于生物量积累和品质改善㊂光周期调控可解决果树栽培中因地理位置㊁季节变化㊁光照不足等问题,可缩短果树培养周期,根据需光量的不同对光周期进行分段管理,通常延长果树苗的光周期可促进其生理代谢与生长过程㊂朱开元等[13]研究结果表明,延长光周期培育罗汉松和鸡爪槭,苗高增幅分别达到17%和20%,但新根数分别下降了31%和21%,光周期延长也使鸡爪槭苗木的生物量和氮(N)㊁磷(P)㊁钾(K)含量显著增加,延长光周期会同时提高苗木对N的吸收和利用效率,但是不会影响养分淋溶㊂吴鹏飞等[14]指出,冬季雾霾天对温室设施草莓进行LED补光处理,可以显著提高草莓植株生长量㊁净光合速率㊂由此看来,果树植株能通过光受体感知光周期变化,并调节其生理生化特性以适应当地环境㊂在自然条件下,短日照往往限制了果树植株的生长和发育,从而减少产量和品质㊂因此,在人工条件下,可以通过补光来延长每天的光周期,提高果树植株的生长发育水平,促进干物质的积累,加快花芽分化并调节其生理特性和开花反应㊂2㊀存在的问题果树栽培的光调控是一个复杂的问题,尤其是植物工厂内不同光照条件对不同果树品种的栽培效果需要具体分析㊂利用LED光源的电能消耗是整个植物工厂的主要能源消耗,需要从装备设计开发㊁精准调控等多方面实现资源高效利用㊂目前果树工厂化栽培光调控技术主要存在以下问题: 1)现有的光源设备成本较高,增加了植物工厂120㊀㊀农机使用与维修2024年第4期的建设和维护成本,当前使用的LED光源容易出现光衰减,影响植物的生长效果和经济效益㊂2)光质是影响果树叶片细胞内活性物质生物合成的主要因素,其对果树次生代谢产物的影响机理尚未清晰,今后应加大相关方面的研究㊂同时,现有关于光调控的研究大多集中在红㊁蓝或红蓝组合光,对某一光质波段内不同波长光的研究较少㊂此外,还应拓展如紫外光㊁远红光㊁绿光等其他不同光质组合对果树代谢和生长发育影响差异的相关研究㊂3)目前,现有果树品种对于植物工厂环境的适应性相对较差㊂缺乏专门针对工厂化栽培而培育出来的果树品种,这一点也成为制约果树规模化生产的重要因素㊂同时,光调控技术基础研究薄弱,对不同果树品种所需的光量和在不同时期对于光照度的需求了解不够充分,由此导致在实际操作过程中难以制定最佳的光照方案以及科学合理的光周期,但实际上每一种果树品种都有其独特的生长规律和光合作用机制㊂4)植物工厂环境自动化控制技术落后㊂植物工厂形成了一套特殊的小区气候环境,其中光照调控对果树的生长发育和生理生化产生较大影响,光照的精确控制是果树工厂化生产的关键㊂与欧美等发达国家相比,我国的植物工厂自动化控制技术还存在一定差距㊂许多工艺仍需要人为监测和调节,缺乏智能化决策系统并且缺乏作物表型方面的传感器,这使得难以精准感知作物的生长需求,也就无法按需提供最佳光配方㊂5)光源强度和波长的调节要结合植物生理特征和光照周期等因素,在实际操作中需要有一定的专业知识和技能㊂这些问题需要技术研究和改进,并与相关领域的专业人士㊁政府机构和公众共同努力,从而使植物工厂光调控技术更加完善和成熟㊂3㊀植物工厂光调控技术未来的发展趋势首先,互联网技术将有望实现专家远程对植物工厂进行精准决策㊂这将实现植物工厂各子系统的智能化集成,并提高作物生长状态㊁环境等信息的实时监测㊂同时,通过专家决策可以保障多系统协同作业和自动化操作,并为无人值守植物工厂的实现奠定坚实基础㊂其次,应加强研发高精度㊁低成本的传感器设备,使之与多传感器融合技术结合起来为自主决策提供原始数据㊂最后,人工智能技术的快速发展和广泛应用将帮助植物工厂实现更加精确㊁便捷和高效的光配方优化,从而最大限度地提高作物生长发育的质量和数量㊂这些发展趋势将继续推动植物工厂光调控技术的创新和升级,为实现大规模农业生产㊁促进可持续发展作出积极的贡献㊂参考文献:[1]㊀陈永快,王涛,兰婕,等.植物工厂内LED光调控在作物栽培中的研究进展[J].江苏农业科学,2020,48(23):40-46.[2]㊀刘盛雨.光质对血橙果实多甲氧基黄酮及花青素积累的调控作用[D].重庆:西南大学,2021.[3]㊀李胜,李唯,杨德龙,等.不同光质对葡萄试管苗根系生长的影响[J].园艺学报,2005,32(5):872-874.[4]㊀张立伟,刘世琦,张自坤,等.不同光质下香椿苗的生长动态[J].西北农业学报,2010,19(6):115-119.[5]㊀张斌斌,蔡志翔,沈志军,等.光质对红叶桃叶片呈色的影响[J].果树学报,2013,30(4):602-607. [6]㊀陈光彩,潘彤彤,毛琪,等.LED红㊁蓝光源对香蕉组培苗生长的影响[J].中国南方果树,2019,48(2):59-66.[7]㊀黄文静,杨光柱,郑丽萍,等.不同光质对火龙果胚培养苗生长发育的影响[J].中国果树,2014(4):46-49,86.[8]㊀马绍英,李胜,张真,等.LED光源不同光质下葡萄试管苗增殖和叶绿素荧光动力学特征[J].甘肃农业大学学报,2013,48(1):56-62.[9]㊀余阳,刘帅,李春霞,等.LED光质对 夏黑 葡萄光合特性和生理指标的影响[J].果树学报,2015,32(5):879-884.[10]尹魁林,张琼.不同因素对冬枣试管苗过渡移栽成活率的影响[J].落叶果树,2014,46(2):8-10. [11]张珊珊,杨文忠,康洪梅,等.光强和土壤含水量对云南蓝果树幼苗生长及光合特征的影响[J].东北林业大学学报,2018(3):16-23.[12]马宗桓.光照强度对葡萄果实品质及花青苷合成的调控机理研究[D].兰州:甘肃农业大学,2019. [13]朱开元,刘慧春,周江华,等.延长光周期对罗汉松和鸡爪槭苗期生长及养分吸收利用的影响[J].浙江大学学报:农业与生命科学版,2016,42(2):190-198.[14]吴鹏飞,王丽娟,刘昭,等.LED补光对设施草莓生长及果实品质的影响[J].北方园艺,2016(21):48-50.(01)。
美国介绍 英文
American IntroductionA reasons of the choicesUnited States is a superpower, whether in the military, is also economically. And the United States position in the world is so important.American introduction-----politicsThe United States consists of 50 states and Washington D.C. The last two States to join the Union were Alaska (49th) and Hawaii (50th). Both joined in 1959. Washington DC is a federal district under the authority of the U.S. Congress. Washington DC is represented in Congress by an elected, non-voting Delegate to the House of Representatives. Residents have been able to vote in presidential elections since 1961.Puerto Rico is a commonwealth associated with the United States. Puerto Ricans are U.S. citizens. Puerto Ricans do not vote in U.S. Presidential elections, but they do elect a non-voting commissioner to the U.S. House of Representatives.U.S. Virgin Islands - St. John, St. Croix, and St. Thomas is an unincorporated territory of the United States. Administered by the Office of Insular Affairs, U.S Department of the Interior Indigenous inhabitants are U.S citizens, but do not vote in U.S. Presidential elections.Northern Mariana Islands is a commonwealth in political union with the United States. Self-governing with locally elected governor and legislature.American Samoa is a unincorporated territory of the United States. Administered by the Office of Insular Affairs, U.S. Department of the Interior.Other Dependent Areas of the United States: Baker Island - Howland Island - Jarvis Island - Johnston Atoll - Kingman Reef - Midway Islands - Navassa Island -Palmyra Atoll - Wake IslandGeography environmentAmericans often speak of their country as one of several large regions. These regions are cultural units rather than governmental units - formed by history and geography and shaped by the economics, literature and folkways that all the parts of a region share.What makes one region different from another? Within several regions, language is used differently and there are strong dialects. There are also differences in outlook andattitude based on geography. A region's multicultural heritage as well as distinct demographic characteristics like age and occupation also make regions different and special.The United States is a varied land - of forests, deserts, mountains, high flat lands and fertile plains. The country lies mostly in the temperate zone but there is a very wide range of climate variations. The continental United States stretches 4,500 kilometers from the Atlantic Ocean on the east to the Pacific Ocean on the west. It borders Canada on the north and reaches south to Mexico and the Gulf of Mexico. The United States covers a total area of 9 million square kilometers (including Alaska and Hawaii). Alaska is the largest in area of the 50 states, and Texas is the second largest.From the Appalachian Mountains in the East to the Rocky Mountains in the West, the center of the country is drained by the Mississippi and Missouri Rivers and their branches. The Mississippi is one of the world's great rivers; it was known to Native Americans as the "father of waters." Water from the source of its main branch, the Missouri River, flows about 6,400 kilometers from the northern Rocky Mountains to the mouth of the Mississippi in the Gulf of Mexico. On a topographic map of the United States, the mountains look like jagged masses, the plains like vast, open flat spaces, and the rivers like meanderingthreads. Today, highways, railways and transcontinental aircraft crises-cross the land, making travel easy. But onlya few generations ago, the topographic features on themap represented great dangers and difficulties.Today's visitors, riding over a good road in the CascadeMountains in the west coast states of Oregon andWashington, may see marks on the rocks made by ropeswhere pioneer settlers painfully lowered their horses andwagons down cliffs to reach the fertile river valley far below. In the Sierra Nevada Mountains of California, the main route now runs through a mountain pass which wasonce too narrow for a wagon to go through. Pioneerfamilies reaching that pass had to take their wagons apartpiece by piece, carry them through, and then reassemblethem on the other side. In 1848, pioneers who crossedthe continent made the trip in 109 days - if they werefortunate and strong. Today a New York family can driveby car to San Francisco in less than a week.The coastal plain of the Atlantic seaboard gives way further inland to deciduous forests and the rolling hills of the Piedmont. The Appalachian Mountains divide the eastern seaboard from the Great Lakes and the grasslands of the Midwest. The Mississippi–Missouri River, the world's fourth longest river system, runs mainly north–south through the heart of the country. The flat, fertile prairie of the Great Plains stretches to the west, interrupted by a highland region in the southeast. The Rocky Mountains, at the western edge of the Great Plains, extend north to south across the country, reaching altitudes higher than 14,000 feet (4,300 m) in Colorado. Farther west are the rocky Great Basin and deserts such as the Mojave. The Sierra Nevada and Cascade mountain ranges run close to the Pacific coast. At 20,320 feet (6,194 m), Alaska's Mount McKinley is the tall lest peak in the country and in North America. Active volcanoes are common throughout Alaska's Alexander and Aleutian Islands, and Hawaiiconsists of volcanic islands. The super volcano underlying Yellowstone National Park in the Rockies is the continent's largest volcanic feature UnitedAmerican national flagOne of our great symbols is the American flag,13 red and white stripes corresponding to the number of original stats on a rectangular piece of color, one corner blue with 50 white stars for 50 states.You see the flag everywhere now, "what so proudly we hail.” It means the World Trade Center happened t o all of us. "We're proud to be Americans, "say flags on front porches in small towns across the country. Some homes seem to have been built to fly the flag. This wouldn't be complete without it; just perfect. "We're American too" say the flags inelegant glued to the city apartment windows. The declaration of patriotic intent is everywhere, the simplest as persuasive as the displays where one was considered not enough. Rockefeller Center with 150 beauties is in show business, a stirring sight although it's unlikely that management there loves our country more than the owner of the smallest small business, displaying just one.The Annin flag company makes most American flags. They have more business than they can do now. You don't have to go to Annin to buy a flag though. Flag sales are a street corner cottage industry . Furtive operatives set up shops, to them the buck means more than the bannerThe color of our flag and the numbers of stars and stripes are ordained, but there is no rule regarding dimension. There are tiny flags on sticks made in China. This grand flag is so big on a building in New York that it had to be continued around the corner. This beauty hangsfrom the side wall of a fire house. And you wouldn't want a dirty flag so they wash them.Everyone wants to be associated with the flag.America and Yale, America and Episcopalians, Americaand JPMorgan, America and Maxell, America and the Ritz Tower.There are inevitably people who are more anxious toappear patriotic than to be patriotic. They treat a fine linebetween patriotism and commerce. The flag is everywhere in close proximity to a business interest. It sells shoes andshoe repair, women's dresses. The American flag invitesdiners to foreign restaurants, Japanese, Italian, even Afghan.There is an official flag code but it is routinely ignored.It is not to be used as a awning or a canopy or plasteredto the hood of a car. The code says the American flag isnot to be used as decorative clothing. Some find it irresistibly fashionable though and we are more amused than they.his is how the star spangled banner was meant to beflown on the end of a pole of its own, free to wave majestically in our own free air.capitalStates Washington by Americans, affectionatelyknown as "the heart of the country", is located at the junction of Maryland and Virginia, it is known as"Washington", is in honor of the founding fathers ofWashington and the discovery of the new world ofChristopher Columbus. The city area of 174 squarekilometers, population of about 640,000. Plenty of rain,four distinct seasons, it was Indians living in history, early17th century European settlers established tobaccoplantations here. In1789 Washington decided in this century.Quadrilaterals in the urban area, the layout well proportioned, broad vision. Buildings will not exceed the height of the Washington Monument in the city, downtown Capitol building is the tallest building in town, there are only eight-story building. Almost no factories in the whole city, so abnormal environmentclean, most of local practitioners are public officers, other fundamental are engaged in the work of culture, business, entertainment and tourism.HistoryThe first Europeans to reach North America were Icelandic Vikings, led by Leif Ericson, about the year 1000. Traces of their visit have been found in the Canadian province of Newfoundland, but the Vikings failed to establish a permanent settlement and soon lost contact with the new continent.Five centuries later, the demand for Asian spices, textiles, and dyes spurred European navigators to dream of shorter routes between East and West. Acting on behalf of the Spanish crown, in 1492 the Italian navigator Christopher Columbus sailed west from Europe and landed on one of the Bahamas Islands in the Caribbean Sea. Within 40 years, Spanish adventurers had carved out a huge empire in Central and South America. In the 16th and 17th Century, Northern Europeans settled in what is now the North East Coast of the United States, which soon fell under the British Crown and stayed an English Colony till the Revolutionary Wars in the late 18th Century. Please see links below for an outline of the history of the United States, with a few selected focus areas. EconomyThe United States entered the 21st century with an economy that was bigger, and by many measures moresuccessful, than ever. Though the United States held less than 5 percent of the world's population, it accounted for more than 25 percent of the world's economic output. In the 1990s, the American economy recorded the longest uninterrupted period of expansion in its history. A wave of technological innovations in computing, telecommunications, and the biological sciences were profoundly affecting how Americans work and play.The United States remains a "market economy." Americans continue to believe that an economy generally operates best when decisions about what to produce and what prices to charge for goods are made through the give-and-take of millions of independent buyers and sellers, not by government or by powerful private interests. Besides believing that free markets promote economic efficiency, Americans see them as a way of promoting their political values as well -- especially, their commitment to individual freedom and political pluralism and their opposition to undue concentrations of power. The American belief in "free enterprise" has not precluded a major role for government, however. Americans at times have looked to government to break up or regulate companies. that appeared to be developing so much power that they could defy market forces. They have relied on government to address matters the private economy overlooks, from education to protecting the environment. And despite their advocacy of market principles, they have used government at times to nurture new industries, and at times even to protect American companies from competition.Government OverviewThe United States is a federal union of 50 states, with the District of Columbia as the seat of the federal government. The Constitution outlines the structure of the national government and specifies its powers andactivities, and defines the relationship between the national government and individual state governments.Power is shared between the national and state (local)governments. Within each state are counties, townships,cities and villages, each of which has its own elective government.Governmental power and functions in the UnitedStates rest in three branches of government: thelegislative, judicial, and executive. Article 1 of the Constitution defines the legislative branch and vestspower to legislate in the Congress of the United States.The executive powers of the President are defined inArticle 2. Article 3 places judicial power in the hands ofone Supreme Court and inferior courts as Congress sees necessary to establish. In this system of a "separation ofpowers" each branch operates independently of the others,however, there are built in "checks and balances" toprevent a concentration of power in any one branch andto protect the rights and liberties of citizens. For example,the President can veto bills approved by Congress and thePresident nominates individuals to serve in the Federaljudiciary; the Supreme Court can declare a law enacted byCongress or an action by the President unconstitutional;and Congress can impeach the President and Federal court justices and judgesTouristAmerican Tourist destination --- HawaiiFor most of us, Hawaii begins to weave her spellwith some little glimmer of awareness. Golden beaches and golden people. Sun, sand, sea, and surf……And somewhere between the blue skies and the palm trees……we're hookedThe Hawaiian Islands are one of the most beautifulplaces on earth. The weather is friendly. The temperature ranges from 60-90 degrees all year long. It's a littlewarmer in summer, and a little cooler in winter, but every day is a beach day for somebody.There are no strangers in Paradise. Perhaps the mostbeautiful part of Hawaii is the genuine warmth of people.We call it the spirit of Aloha . It has allowed a melting potof cultures from all over the world to find commonground , and a new home, in this most gentle of places. state-maintained history museumNorth side of the Mall, 14th St NW and ConstitutionAve; closest Metro Smithsonian.If you like kitsch, you won't want to miss the bizarremélange of cultural artifacts at the National Museum ofAmerican History. George Washington's wooden teeth,Muhammad Ali's boxing gloves, and the ruby slippers JudyGarland wore in the Wizard of Oz are set among didacticdisplays tracing the country's development. It's not so much a center for scholarly study as a sanctuary for vanishing Americana, incorporating Model T Fords, oldpost offices and even a restored, turn-of-the-century ice-cream parlor, which still serves up banana splits.As you enter from the Mall, directly on to the secondfloor, a sound-and-light display showcases the batteredred, white and blue flag that inspired the US nationalanthem - the Star-Spangled Banner itself, which survivedthe British bombing of Baltimore harbor during the War of 1812. The worthier exhibits are also on this floor: an account of the rural farm-based society of the early US stands across from an examination of the mass movement of African-Americans from Southern farms to the wartime industries of northern cities. A lunch counter from Woolworths in Greensboro, North Carolina, evokes the sit-in of 1960, while "American Encounters" focuses on New Mexico, looking at how tourism has affected communitiessuch as the pueblo of Santa Clara and Hispanic Chimayo. On the first floor, the "Information Age" gallery tracescommunications from Morse's first telegraph to AppleMacintoshes, while separate galleries display in gloriousprofusion the artifacts and machines that have shapedmodern America - from light bulbs and motorbikes totrains and atomic clocks. The top floor holds politicalmemorabilia (much of it over a century old), stamp andcoin collections, old TV sets and typewriters, though two final outstanding exhibits inject a serious tone - "Personal Legacy: the Healing of a Nation" brings together some ofthe 25,000 items left by relatives at the Vietnam Memorialin DC, while "A More Perfect Union" deals candidly withthe shameful internment of Japanese-American citizens during World War IIEducationUnited States education system and the educationsystem in most other countries one of the main differences, are United States education for everyone, was not set up specifically for minorities. Taxes through free education, in addition to general school subjects, such as math, history, languages, as well as subjects such as sewing, typing, radios and car repair. Students to follow their own interests, future plans and that it would take yourself in many subjects. United States the primary purpose of education, is to develop each child's talents, no each child's talents, no matter to what extent it high or low, and civic awareness to each child.United States law provides that any school-age childshould enter school, and provide (free) primary andsecondary education, access to private schools, of course,will have to pay very expensive fees. Some publicsecondary schools, admission of foreign students andforeign students ' visas will be issued, but these foreignstudents, had to pay tuition, roughly the same with other students into private schools. As primary school andMiddle School of system, in tie Shang also has severaldifferent of forms, due to each State and each city orTownship of different situation and has different (such assome is six years primary school and the six years in thesystem, also some is learn is divided into II or three yearssystem of junior high school and the four years system ofhigh school and so on forms), but regardless of what, in principle in students 18 age, should read finished secondary education. As the United States keeps suppliesof universal education, some 93% of school-age childrenenrolled in secondary education, and 70% can completetheir studies, most of them to enter university or post-secondary college to continue their studies, began their higher (tertiary) education.CultureThe main content of American culture is the emphasize on individuals' value, the pursue of democracy and freedom, the promotion of deportation and competition and the need of realistic and practicality. Its core is individualism: self first, personal need first, pursue of individual benefit and enjoyment, emphasize on achieving individual value by self-strive and self-design. This type of intentionally build up of personality and pursue customized individualism has its pros and cons, it gives incentives to people and make them exert on their potential and wisdom and as a result accelerate the development of the entire race and nation; on the other hand it is difficult to keep good relationship among people if everyone is egocentric thus make the entire society lack of unity.Egocentric:American citizens emphasize on achievements and respect heroes. They have great sense in their hearts topraise success and heroes. Personal achievements are oneof those with the highest value in Americans mind.Americans have very strong senses of success. Success isthe pursuit of most Americans, it is their attractive futureand the incentives for moving forward. They believe thatone's personal value is equivalent to his achievements inhis career. Some high achievers in their career such as entrepreneurs, scientists, artists and all kinds of super starts became modern heroes. The process and result ofhow they strived have become the frame of reference ofsocial culture value and the real life text book for parents to educate their children.Incentive: Serving to induce or motivateAmerican society has great movements within itself.These movements are shown in two aspects: movementsamongst locations and movements inside the society. The United States are relatively more open and have more freedom. Developed transport and the tradition of adventure and sporty makes a lot of American migrate from countryside to cities, from downtown to uptown; and from north to the southern sunny land, from one city to another. Unlike European countries, the social classes in America is not so stable. Further more, with the avocation of public education, movements upwards along the social ladder have become possible. Many people living in the states, no matter whether they are Native American or immigrants from overseas, have the same dream of changing their social class and make their lifetime dream come true through their own efforts. This is what they often called "American dream".avocation：(=advocacy)United States culture stresses personal values are the main content, the pursuit of democracy and freedom,advocating the development and competition, the rationaland practical, the core of which is individual-centered:gerent his hang, war against the first, and the right ofindividuals to pursue their private interests, throughpersonal struggles, personal design, the pursuit of theultimate realization of personal values. This deliberatelyshaped itself, the pursuit of personalized individualism has its positive side, also has a negative side. It mobilized the enthusiasm of the individuals, leaving many people to givefull play to the wisdom and potential, so as to promote therevitalization and development of Nations and States as awhole. However, all I-centric, human relationships makesit difficult to get along, and society as a whole will lackcohesion.United States public focus on achievement, admiredhero, has a profound psychological accumulation ofachievements of worship and hero worship. Values in the evaluation of individual achievements are all Americans one of the highest value. Americans have very strong achievements (or success). Pursuit of success is all Americans, are enticing prospect, forward motion. They strongly believe that a person is equal to the value of his achievements in his career. Some successful entrepreneurs, scientists, artists and various stars, became a hero of the new age. The process and results of their personal struggles, became the frame of socio-cultural value orientation, parents educate their children live teaching material.United States is a highly mobile society. Thismovement manifests itself in two aspects: geographicalmobility and social movements. United States relativelyfree, better transport and adventure traditions make manyAmericans of good flows from rural to urban, and flowsfrom the Center to the suburbs; streaming from the North to the southern Sunbelt, flowing from one city to another city. United States social classes is less fixed than European countries,together with universal access to public education, made it possible to down the social ladder for upward mobility. Many of those living in the United States who is a native American, was winging came to the United States of foreign immigrants, have a dream, that through their own efforts, change his or her status in society to realize its dream of life, which is often talked about "United States dream."social customs and habitsetiquetteIn United States society must "Malaysians"You must understand and comply with United States rules of social etiquette summaries inIn terms of dress, although Americans for easygoing, informal impressions, but at work, dinner occasions, still very formal, dress rules very much, but to take, for example, attend weddings, funerals, should be black or plain clothing, women Office dresses, avoid wearing denim trousers.By bus, car seat the size of the order, depends on the host drive or driving to other vendors. Is aboard taxi, should yahoo block right of seat for maximum block, Hour block of left bit for followed by, again second for middle, and drivers next to of seat for most British Columbia bit. as drove of is friends, is he next to of seat for most statue bit, second is Hour block right, and left and the Middle bit. therefore in China common men and women friends aboard taxi Shi, men always open door let Lady first entered,moved to left bit, men again sat to right bit Shang, this is full does not meet official Western etiquette of, correctly way should is let Lady seat Hour, Around tothe left door on its own on the train seat. up and down the stairs there is a certain rule should be letting the lady up the stairs, the elderly, Mrs. is meant to protect,security for the elderly.In diet of area, to attention tableware should first by most outside of a Deputy knives and forks began using, food to with fork pressure tight, cut small block only into mouth, eat food and the drink soup Shi not voice, drink coffee of small spoon is used to mixing milk and the sugar of, remember not with spoon to drink coffee, and avoid in restaurant in the hubbub, as received please posted dinner, to attention following several points: is needs sent Hui Cambodia, told master participate in or not, sometimes also available phone notification, as please posted Shang indicate "regrets only", You only notice if unable to attend, "RSVP" regardless of the participation were sent back or call. Attention of the party have nodress rules.On time, when attending the reception, you can within the time prescribed (such as from five o'clock) and, of course, should not be too late to.If invited to dinner guests, the masters should note 1.with a guest for company：familiar people should be invited and guest relations to accompany.2.Food:Should understand the guests have an avoid certain food, such as whether for vegetarians, as the Jews do not eat pork and scaly fish.3.Seat:Owners should sit at the back gate location, subject and its opposite, also, note class, hierarchy, and to the principle of men and women, husbands and wives, sat at home and abroad.Staple food and drinks at table types should be subject to, such as eating fish to drink liquor, eating meat, drinkingred wine, red wine should be identical to room temperature, and are not strongly invited guests "a toast", as regards spirits such as whisky and brandy, is more than a meal or a drink before dinner. International social etiquette provisions abound, these are only a few end, United States rows out of the social etiquette, also needs to keep his eyes open on weekdays and can only learn. CourtesyBow, etiquette between is subordinate to a parent or sibling. Bow hat, the right hand holding the Central Hat brim removed, left hanging, upper body leaning about 15 degrees, his eyes watching the nation's economy prospers, and greetings.Handshake ceremony is common courtesy in the world. Originated in Europe, initially said no weapons in their hands, or kind of mean. Handshake to handshake ceremony to the first extension release. Normally shake hands without gloves, but noble man and woman can wear gloves. Via bogey when you cross via, shook hands with a woman not too tight.Nod, a peer or between people of the same generation of etiquette. Meet on the road, in the road map. , Such as the Executive, superior or elder, no nod and bow.Hand salute, which is military etiquette. When via the right hand, fingers straightened and aligned, finger contact brim right side, palms slightly outside the send a gift, arm and shoulder high, his eyes watching the nation's economy prospers, the other side will be lined up in hands down.Hand-kissing, was courtesy of the upper classes in Europe and America. And noble women or when we meet her, if she put out a hand hanging type, then gently lift the Palm kiss. If the woman does not reach out, you can't Hand-kissing.。
LED光质对蔬菜生长及品质影响研究进展
湖南农业科学(HUNAN AGRICULTURAL SCIENCES)2020(12)：105-108引用格式：刘玉兵，干军伟，李洁，等.LED光质对蔬菜生长及品质影响研究进展［J］.湖南农业科学，2020（12）:105-108.DOI:10.16498/ki.hnnykx.2020.012.027LED光质对蔬菜生长及品质影响研究进展刘玉兵，王军伟，李洁，罗鑫辉，刘明月(湖南农业大学园艺学院，湖南长沙410128)摘要：光是植物生长发育的重要环境因子，也是一种调节植物生长发育过程的重要因子，综述了红、蓝、黄、紫单色光和不同比例混合光对蔬菜(绿叶类蔬菜、茄果类蔬菜及芽苗菜)生长、品质以及碳氮代谢影响的研究进展，以期为植物工厂进行优质、高产蔬菜栽培提供技术支撑和理论指导。
关键词：LED光质；蔬菜；生长；品质；碳氮代谢；综述中图分类号：S63;Q945文献标识码：A文章编号：1006-060X(2020)12-0105-04Research Progress on the Effect of LED Light Quality on the Growth and Quality of Vegetables LIU Yu-bing,WANG Jun-wei,LI Jie,LUO Xin-hui,LIU Ming-yue(College of H orticulture and Landscape,Hunan Agricultural University,Changsha410128,PRC)Abstract：Light is not only an important environmental factor for plant growth and development but also an important factor for regulating plant growth and development process.This paper introduces the research progress on the effects of monochromatic light and mixed light in different proportions on the growth and quality of vegetables(green leaf vegetables,eggplant fruit vegetables and sprouts) and carbon and nitrogen metabolism,which may provide practical and effective technical support and theoretical basis for plantin莒high-quality and high-yield vegetables in plant factories.Key words：LED light quality;vegetables;growth;quality;carbon and nitrogen metabolism;review光照是影响植物生长发育的重要环境因子”植物缺少光照或光照不足时，其生长发育会受到抑制，产量和品质出现大幅度下降冋。
高中英语议论文写作论点论据选择练习题40题
高中英语议论文写作论点论据选择练习题40题1.Which of the following is a good argument for the impact of technology on life?A.Technology makes people more isolated.B.Technology has improved communication and connectivity.C.Technology has led to a decline in creativity.D.Technology has increased environmental pollution.答案：B。
解析：选项 A 中说科技使人们更加孤立，这只是科技的一个负面影响，不能作为科技对生活的好的论点。
选项C 说科技导致创造力下降，也是片面的观点。
选项D 科技增加环境污染，也是负面的影响。
而选项B 科技改善了沟通和连接性，是科技对生活积极的影响，符合主题。
2.Which statement can be used as evidence of technology's influence on life?A.People spend less time outdoors due to technology.B.Technology has made education more accessible.C.Technology has caused a decrease in face-to-face interactions.D.Technology has led to a loss of traditional skills.答案：B。
解析：选项 A 人们因为科技花更少时间在户外，是负面的影响。
选项C 科技导致面对面交流减少，也是负面的。
选项D 科技导致传统技能丢失，同样是负面的。
而选项B 科技使教育更容易获得，是科技对生活积极的影响，符合主题。
工厂污染英语作文
Factory pollution is a significant environmental issue that has been the subject of much debate and concern in recent years.The rapid industrialization and urbanization have led to an increase in the number of factories,which in turn has resulted in various forms of pollution,including air,water,and soil pollution.One of the primary sources of factory pollution is the emission of harmful gases into the atmosphere.Factories that burn fossil fuels for energy release large amounts of carbon dioxide and other greenhouse gases,contributing to global warming and climate change. Additionally,the release of toxic chemicals,such as sulfur dioxide and nitrogen oxides, can lead to respiratory problems and other health issues for people living in the vicinity of these factories.Water pollution is another major concern associated with factory operations.Industrial wastewater,which often contains heavy metals,chemicals,and other pollutants,is sometimes discharged into rivers and lakes without proper treatment.This can lead to the contamination of water sources,making them unsafe for human consumption and damaging aquatic ecosystems.Soil pollution is also a consequence of factory activities.The improper disposal of industrial waste,such as solid waste and hazardous chemicals,can lead to the contamination of soil,affecting the fertility of the land and posing risks to both human health and the environment.To address the issue of factory pollution,several measures can be taken.Firstly,factories should be required to implement stricter emission standards and invest in cleaner technologies to reduce the release of harmful substances into the environment.Secondly, proper waste management practices should be enforced,including the treatment of industrial wastewater before it is discharged and the safe disposal of solid waste. Moreover,governments can play a crucial role in regulating industrial activities and ensuring compliance with environmental regulations.This may involve the implementation of policies and incentives to promote sustainable practices within the industry,as well as the enforcement of penalties for noncompliance.Public awareness and education are also essential in combating factory pollution.By raising awareness about the environmental impacts of industrial activities,individuals and communities can become more proactive in demanding cleaner and more sustainable practices from factories.In conclusion,factory pollution is a pressing issue that requires the collective efforts ofindustries,governments,and society as a whole.By adopting cleaner technologies, enforcing stricter regulations,and promoting public awareness,we can work towards reducing the environmental impact of factory operations and ensuring a healthier and more sustainable future for all.。
植物工厂LED_光质调控对辣椒生长的影响
植物工厂LED光质调控对辣椒生长的影响王哲1王宇航2王晓庆3樊怀福3（1至农科技发展（浙江）有限公司，浙江杭州310012；2南京优士环境技术有限公司，江苏南京210000；3浙江农林大学园艺科学学院，浙江杭州311300）摘要为探讨植物工厂中不同光质配比对杭椒五号辣椒生长的影响，本研究选用4种不同红蓝光配比的LED光源，并以LED白光为对照，开展光质调控试验。
结果表明：红光∶蓝光=1∶1的光质配比下杭椒五号辣椒株高、茎粗均最大，有利于杭椒五号辣椒的营养生长；红光∶蓝光=1∶1的光质配比有利于杭椒五号辣椒叶绿素和氮含量的增加，能促进光合作用，提高光能利用率；红光∶蓝光=1∶1的光质配比有利于杭椒五号辣椒果实发育和产量提高。
综合各指标表明，红光∶蓝光=1∶1是适于植物工厂杭椒五号辣椒生长的光质配比。
关键词辣椒；光质调控技术；LED；植物工厂；红蓝组合光中图分类号S641.3文献标识码A文章编号1007-5739（2023）21-0069-04DOI：10.3969/j.issn.1007-5739.2023.21.018开放科学（资源服务）标识码（OSID）：Effect of LED Light Quality Control in Plant Factory on Growth of PepperWANG Zhe1WANG Yuhang2WANG Xiaoqing3FAN Huaifu3(1Zhinong Science and Technology Development(Zhejiang)Co.,Ltd.,Hangzhou Zhejiang310012;2Nanjing Youshi Environmental Technology Co.,Ltd.,Nanjing Jiangsu210000;3College of Horticulture Science,Zhejiang A&F University,Hangzhou Zhejiang311300) Abstract In order to investigate the effect of different light quality ratios in plant factories on the growth of Hangjiao No.5pepper,this study selected four LED light sources with different red and blue light ratios,and conducted light quality control experiments with LED white light as the control.The results showed that under the light quality ratio of red light∶blue light=1∶1,the plant height and stem diameter of Hangjiao No.5pepper were all the highest,which was beneficial for the nutritional growth of Hangjiao No.5pepper;the light quality ratio of red light∶blue light=1∶1was conducive to the increase of chlorophyll and nitrogen content in Hangjiao No.5pepper,which could promote photosynthesis and improve light energy utilization efficiency;the light quality ratio of red light∶blue light=1∶1was conducive to the fruit development and yield improvement of Hangjiao No.5pepper.The comprehensive indicators indicate that red light∶blue light=1∶1is the optimal light quality ratio for the growth of Hangjiao No.5pepper in plant factory.Keywords pepper;light quality control technology;LED;plant factory;red and blue combination light日益严重的土壤次生盐渍化已成为制约我国传统农业生产以及农业可持续发展的主要环境因素之一[1]。
2011年全国考研英语(二)试题及答案
2011年全国考研英语（二）试题及答案Section I Use of EnglishDirections: Read the following text. Choose the best word(s) for each numbered blank and mark A B C or D on Answer Sheet 1 (10 points)Individuals and businesses have legal protection for intellectual property they create and own. Intellectual property _1_from creative thinking and may include products _2_ processes and ideas. Intellectual property is protected _3_ misappropriation (盗用) Misappropriation is taking the intellectual property of others without _4_ compensation and using it for monetary gain.Legal protection is provided for the _5_ of intellectual property. The three common types of legal protection are patents copyrights and trademarks.Patents provide exclusive use of inventions. If the U.S. Patent Office _6_ a patent it is confirming that the intellectual property is _7_. The patent prevents others from making using or selling the invention without the owner’s _8_ for a period of 20 years.Copyright are similar to patents _9_ that they are applied to artistic works. A copyright protects the creator of an _10_ artistic or intellectual work such as a song or a novel. A copyright gives the owner exclusive rights to copy _11_ display or perform the work. The copyright prevents others from using and selling the work. The _12_ of a copyright is typically the lifetime of the author _13_ an additional 70 years.Trademarks are words names or symbols that identify the manufacturer of a product and _14_ it from similar goods of others. A servicemark is similar to a trademark _15_ is used to identify service.A trademark prevents others from using the _16_ or a similar word name or symbol to take advantage of the recognition and _17_ of the brand or to create confusion in the marketplace. _18_ registration a trademark is usually granted for a period of ten years. It can be _19_ for additional ten-year periods indefinitely as _20_ as the mark’s use continues.1. A. retrieves B. deviates C. results D. departs2. A. services B. reserves C. assumptions D. motions3. A. for B. with C. by D. from4. A. sound B. partial C. due D. random5. A. users B. owners C. masters D. executives6. A. affords B. affiliates C. funds D. grants7. A. solemn B. sober C. unique D. universal8. A. perspective B. permission C. conformity D. consensus9. A. except B. besides C. beyond D. despite10. A. absolute B. alternative C. original D. orthodox11. A. presume B. stimulate C. nominate D. distribute12. A. range B. length C. scale D. extent13. A. plus B. versus C. via D. until14. A. distract B. differ C. distinguish D. disconnect15. A. or B. but C. so D. whereas16. A. identical B. analogical C. literal D. parallel17. A. ambiguity B. utility C. popularity D. proximity18. A. From B. Over C. Before D. Upon19. A. recurred B. renewed C. recalled D. recovered20. A. long B. soon C. far D. wellSection II Reading ComprehensionPart ADirections: Read the following four passages. Answer the questions below each passage by choosing A B C or D. Mark your answers on Answer Sheet 1 (40 points)Text 1Within a large concrete room cut out of a mountain on a freezing-told island just 1000 kilometers from the North Pole could lie the future of humanity.The room is a vault (地下库) designed to hold around 2 million seeds representing all known varietie s of the world’s crops. It is being built to safeguard the world’s food supply against nuclear war climate change terrorism rising sea levels earthquakes and the collapse of electricity supplies. “If the worst came to the worst this would allow the world to reconstruct agriculture on this planet.” says Cary Fowler director of the Global Crop Diversity Trust an independent international organization promoting the project.The Norwegian (挪威的) government is planning to create the seed bank next year at the request of crop scientists. The $3 million vault will be built deep inside a sandstone mountain on the Norwegian Arctic island of Spitsbergen. The vault will have metre-thick walls of reinforced concrete and will be protected behind two airlocks and high-security doors.The vault’s seed collection will represent the products of some 10000 years of plant breeding by the world’s famers. Though most are no longer widely planted the varieties contain vital genetic properties still regularly used in plant breeding.To survive the seeds need freezing temperatures. Operators plan to replace the air inside thevault each winter when temperatures in Spitsbergen are around -18℃. But even if some disaster meant that the vault was abandoned the permanently frozen soil would keep the seeds alive. And even accelerated global warming would take many decades to penetrate the mountain vault.“This will be the world’s most secure gene bank” says Fowler. “But its seeds will only be used when all other samples have gone for some re ason.”The project comes at a time when there is growing concern about the safety of existing seed banks around the world. Many have been criticized for poor security ageing refrigeration (冷藏) systems and vulnerable electricity supplies.The scheme won UN approval at a meeting of the Food and Agriculture Organization in Rome in October 2005. A feasibility study said the facility “would essentially be built to last forever”.21. The Norwegian vault is important in that _________________.A. the seeds in it r epresent the rarest varieties of world’s crops.B. the seeds in it could revive agriculture if the worst thing should happenC. it is built deep in a mountain on a freezing-cold Arctic islandD. it is strong enough against all disasters caused by man and nature22. The seed bank project was proposed by __________.A. the Norwegian governmentB. Norwegian farmersC. Spitsbergen residentsD. agricultural scientists23. The seeds in the vault will be stored ____________________.A. as samples of world crop varietiesB. as products of world plant breedingC. for their valuable genetic propertiesD. for their resistance to plant diseases24. For the seed bank project to be successful the most important factor is probably________.A. constructing tight airlocksB. maintaining high securityC. keeping freezing temperaturesD. storing large quantities of seeds25. Which of the following statements is true?A. The Norwegian vault models after existing seed banksB. The Spitsbergen seed bank is expected to last 10000 yearsC. The existing seed banks have potential problemsD. The UN financed the Spitsbergen seed bankText 2Both the number and the percentage of people in the United States involved in nonagricultural pursuits expanded rapidly during the half century following the Civil War with some of the most dramatic increases occurring in the domains of transportation manufacturing and trade and distribution. The development of the railroad and telegraph systems during the middle third of the nineteenth century led to significant improvements in the speed volume and regularity of shipments and communications making possible a fundamental transformation in the production and distribution of goods.In agriculture the transformation was marked by the emergence of the grain elevators the cotton presses the warehouses and the commodity exchanges that seemed to so many of the nation’s farmers the visible sign of a vast conspiracy against them. In manufacturing the transformation was marked by the emergence of a “new factory system” in which plants became larger more complex and more systematically organized and managed. And in distribution the transformation was marked by the emergence of the jobber the wholesaler and the mass retailer. These changes radically altered the nature of work during the half century between 1870 and 1920.To be sure there were still small workshops where skilled craftspeople manufactured products ranging from newspapers to cabinets to plumbing fixtures. There were the sweatshops in city tenements where groups of men and women in household settings manufactured clothing or cigars on a piecework basis. And there were factories in occupations such as metalwork where individual contractors presided over what were essentially handicraft proprietorships that coexisted within a single building. But as the number of wage earners in manufacturing rose from 2.7 million in 1880 to 4.5 million in 1900 to 8.4 million in 1920 the number of huge plants like the Baldwin Locomotive Works in Philadelphia burgeoned as did the size of the average plant. (The Baldwin Works had 600 employees in 1855 3000 in 1875 and 8000 in 1900.) By 1920 at least in the northeastern United States where most of the nation’s manufacturing wage earners were concentrated three-quarters of those worked in factories with more than 100 employees and 30 percent worked in factories with more than 1000 employees.26. What can be inferred from the passage about the agricultural sector of the economy after the Civil War?A. New technological developments had little effect on farmers.B. The percentage of the total population working in agriculture declined.C. Many farms destroyed in the war were rebuilt after the war.D. Farmers achieved new prosperity because of better rural transportation.27. Which of the following was NOT mentioned as part of the “new factory system?”A. A change in the organization of factories.B. A growth in the complexity of factories.C. An increase in the size of factories.D. An increase in the cost of manufacturing industrial products.28. Which of the following statements about manufacturing before 1870 can be inferred from the passage?A. Most manufacturing activity was highly organized.B. Most manufacturing occurred in relatively small plants.C. The most commonly manufactured goods were cotton presses.D. Manufacturing and agriculture each made up about half of the nation’s economy.29. The author mentions the Baldwin Locomotive Works in Paragraph 3 because it wasA. a well-known metal-worksB. the first plant of its kind in PhiladelphiaC. typical of the large factories that were becoming more commonD. typical of factories that consisted of a single building30. The word “presided over” in Paragraph 3 are closest in meaning toA. managedB. led toC. worked inD. producedText 3In 1985 when a Japan Air Lines (JAL) jet crashed its president Yasumoto Takagi called each victim’s family to apologize and then promptly resigned. And in 1987 when a subsidiary of Toshiba sold sensitive military technology to the former Soviet Union the chairman of Toshiba gave up his post.These executive actions which Toshiba calls “the highest form of apology” may seem bizarre to US managers. No one at Boeing resigned after the JAL crash which may have been caused by a faulty Boeing repair.The difference between the two business cultures centers around different definitions of delegation. While US executives give both responsibility and authority to their employees Japanese executives delegate only authority—the responsibility is still theirs. Although the subsidiary that sold the sensitive technology to the Soviets had its own management the Toshiba top executives said they “must take personal responsibility for not creating an atmosphere throughout the Toshiba group that would make suc h activity unthinkable even in an independently run subsidiary.”Such acceptance of community responsibility is not unique to businesses in Japan. School principals in Japan have resigned when their students committed major crimes after school hours. Even if they do not quit Japanese executives will often accept primary responsibility in other ways such as taking the first pay cut when a company gets into financial trouble. Such personal sacrifices even if they are largely symbolic help to create the sense of community and employee loyalty that is crucial to the Japanese way of doing business.Harvard Business School professor George Lodge calls the ritual acceptance of blame “almost a feudal (封建的) way of purging (清除) the community of dishonor” and to some i n the United States such resignations look cowardly. However in an era in which both business and governmental leaders seem particularly good at evading responsibility many US managers would probably welcome an infusion (灌输) of the Japanese sense of responsibility If for instance US automobile company executives offered to reduce their own salaries before they asked their workers to take pay cuts negotiations would probably take on a very different character.31. Why did the chairman of Toshiba resign his position in 1987?A. In Japan the leakage of a state secret to Russians is a grave crime.B. He had been under attack for shifting responsibility to his subordinates.C. In Japan the chief executive of a corporation is held responsible for the mistake made by its subsidiaries.D. He had been accused of being cowardly towards crises that were taking place in his corporation.32. According to the passage if you want to be a good manager in Japan you have to ________.A. apologize promptly for your subordinates' mistakesB. be skillful in accepting blames from customersC. make symbolic sacrifices whenever necessaryD. create a strong sense of company loyalty33. What’s Professor George Lodge’s attitude towards the resignations of Japanese corporate leaders?A. sympatheticB. biasedC. criticalD. approving.34. Which of the following statements is TRUE?A. Boeing had nothing to do with the JAL air crash in 1985.B. American executives consider authority and responsibility inseparable.C. School principals bear legal responsibility for students' crimes.D. Persuading employees to take pay cuts doesn’t help solve corporate crises.35. The passage is mainly about ______________.A. resignation as an effective way of dealing with business crisesB. the importance of delegating responsibility to employeesC. ways of evading responsibility in times of crisesD. the difference between two business culturesText 4The end of the nineteenth century and the early years of the twentieth century were marked by the development of an international Art Nouveau style characterized by sinuous lines floral and vegetable motifs and soft evanescent coloration. The Art Nouveau style was an eclectic one bringing together elements of Japanese art motifs of ancient cultures and natural forms. The glass obxxxxjects of this style were elegant in outline although often deliberately distorted with pale or iridescent surfaces. A favored device of the style was to imitate the iridescent surface seen on ancient glass that had been buried. Much of the Art Nouveau glass produced during the years of its greatest popularity had been generically termed “art glass.” Art glass was intended for decorative purposes and reliedfor its effect upon carefully chosen color combinations and innovative techniques.France produced a number of outstanding exponents of the Art Nouveau style; among the most celebrated was Emile Galle (1846-1904). In the United States Louis Comfort Tiffany (1848-1933) was the most noted exponent of this style producing a great variety of glass forms and surfaces which were widely copied in their time and are highly prized today. Tiffany was a brilliant designer successfully combining ancient Egyptian Japanese and Persian motifs.The Art Nouveau style was a major force in the decorative arts from 1895 until 1915 although its influence continued throughout the mid-1920’s. It was eventually to be overtaken by a new school of thought known as Functionalism that had been present since the turn of the century. At first restricted to a small avant-garde group of architects and designers Functionalism emerged as the dominant influence upon designers after the First World War. The basic tenet of the movement—that function should determine form—was not a new concept. Soon a distinct aesthetic code evolved: form should be simple surfaces plain and any ornament should be baxxxxsed on geometric relationships. This new design concept coupled with the sharp postwar reactions to the styles and conventions of the preceding decades created an entirely new public taste which caused Art Nouveau types of glass to fall out of favor. The new taste demanded dramatic effects of contrast stark outline and complex textural surfaces.36. What does paragraph 1 mainly discuss?A. Design elements in the Art Nouveau styleB. The popularity of the Art Nouveau styleC. Production techniques for art glassD. Color combinations typical of the Art Nouveau style37. What is the main purpose of paragraph 2?A. To compare different Art Nouveau stylesB. To give examples of famous Art Nouveau artistsC. To explain why Art Nouveau glass was so popular in the United StatesD. To show the impact Art Nouveau had on other cultures around the world38. What does the author mean by stating that “function should determine form” (para 3 line 6)?A. A useful obxxxxject should not be attractiveB. The purpose of an obxxxxject should influence its formC. The design of an obxxxxject is considered more significant than its functionD. The form of an obxxxxject should not include decorative elements39. It can be inferred from the passage that one reason Functionalism became popular was that itA. clearly distinguished between art and designB. appealed to people who liked complex painted designsC. reflected a common desire to break from the pastD. was easily interpreted by the general public40. Paragraph 3 supports which of the following statements about Functionalism?A. Its design concept avoided geometric shapes.B. It started on a small scale and then spread gradually.C. It was a major force in the decorative arts before the First World WarD. It was not attractive to architects and designersPart BDirections: Read the following text and then answer the questions by finding a subtitle for each of the marked parts or paragraphs. There are two extra items in the subtitle. Mark your answers on Answer Sheet 1 (10 points)Growth in the market for glass craftsHistorical development of glassArchitectural experiments with glassA former glass technologyComputers and their dependence on glassWhat makes glass so adaptableExciting innovations in fiber opticsGlass in one form or another has long been in noble service to humans. As one of the most widely used of manufactured materials and certainly the most versatile it can be as imposing as a telescope mirror the width of a tennis court or as small and simple as a marble rolling across dirt. The uses of this adaptable material have been broadened dramatically by new technologies: glass fiber optics—more than eight million miles—carrying telephone and television signals across nations; glass ceramics serving as the nose cones of missiles and as crowns for teeth; tiny glass beads taking radiation doses inside the body to specific organs; even a new type of glass fashioned of nuclear waste in order to dispose of that unwanted material.41. _____________________________________On the horizon are optical computers. These could store programs and process information by means of light—pulses from tiny lasers—rather than electrons. And the pulses would travel over glass fibers not copper wire. These machines could function hundreds of times faster than today’s electronic computers and hold vastly more information. Today fiber optics are used to obtain a cleaner image of smaller and smaller obxxxxjects than ever before—even bacterial viruses. A new generation of optical instruments is emerging that can provide detailed imaging of the inner workings of cells. It is the surge in fiber optic use and in liquid crystal displays that has set the U.S. glass industry (a 16 billion dollar business employing some 150000 workers) to building new plants to meet demand.42. ______________________________________But it is not only in technology and commerce that glass has widened its horizons. The use of glass as art a tradition going back at least to Roman times is also booming. Nearly everywhere it seems men and women are blowing glass and creating works of art. “I didn’t sell a piece of glass until 1975” Dale Chihuly said smiling for in the 18 years since the end of the dry spell he has become one of the20th century. He now has a new commission—a glass sculpture for the headquarters building of a pizza company—for which his fee is half a million dollars.43. ______________________________________But not all the glass technology that touches our lives is ultra-modern. Consider the simple light bulb; at the turn of the century most light bulbs were hand blown and the cost of one was equivalent to half a day’s pay for the average worker. In effect the invention of the ri bbon machine by Corning in the 1920s lighted a nation. The price of a bulb plunged. Small wonder that the machine has been called one of the great mechanical achievements of all time. Yet it is very simple: a narrow ribbon of molten glass travels over a moving belt of steel in which there are holes. The glass sags through the holes and into waiting moulds. Puffs of compressed air then shape the glass. In this way the envelope of a light bulb is made by a single machine at the rate of 66000 an hour as compared with 1200 a day produced by a team of four glassblowers.44. _______________________________________The secret of the versatility of glass lies in its interior structure. Although it is rigid and thus like a solid the atoms are arranged in a random disordered fashion characteristic of a liquid. In the melting process the atoms in the raw materials are distributed from their normal positioning the molecular structure; before they can find their way back to crystalline arrangements the glass cools. Thisl ooseness in molecular structure gives the material what engineers call tremendous “formability” which allows technicians to tailor glass to whatever they need.45. ______________________________________Today scientists continue to experiment with new glass mixture and building designers test their imaginations with applications of special types of glass. A London architect Mike Davies sees even more dramatic buildings using molecular chemistry. “Glass is the great building material of the future the ‘dynamic skin’ ” he said. “Think of glass that has been treated to react to electric currents going through it glass that will change from clear to opaque at the push of a button that gives you instant curtains. Think of how the tall buildings in New York could perform a symphony of colors as the glass in them is made to change colors instantly.” Glass as instant curtains is available now but the cost is exorbitant. As for the glass changing colors instantly that may come true. Mike Davies’s vision may indeed be on the way to fulfillment.Section III Translation46. Directions: In this section there is a passage in English. Translate it into Chinese and write your version on Answer Sheet 2 (15 points)The media can impact current events. As a graduate student at Berkeley in the 1960s I remember experiencing the events related to the People’s Park that were occurring on campus. Some of these events were given national media coverage in the press and on TV. I found it interesting to compare my impressions of what was going on with perceptions obtained from the news media. I could begin to see events of that time feed on news coverage. This also provided me with some healthy insights into the distinction between these realities.Electronic media are having a greater i mpact on the people’s lives every day. People gather more and more of their impressions from representations. Television and telephone communications are lixxxxnking people to a global village or what one writer calls the electronic city. Consider the information that television brings into your home every day. Consider also the contact you have with others simply by using telephone. These media extend your consciousness and your contact for example the video coverage of the 1989 San Francisco earthquake fo cused on “live action” such as the fires or the rescue efforts. This gave the viewer the impression of total disaster. Television coverage of the Iraqi War also developed an immediacy. CNN reported events as they happened. This coverage was distributed worldwide. Although most people were far away from these events they developed some perception of these realities.Section IV WritingPart A47. Directions: Read the following Chinese and write an abstract of 80-100 words. You should write your abstract on Answer Sheet 2. (10 points)高崚、杨威被华中科技大学“劝退”，暴露出这样一个问题，一些运动员上学，只是名义上的，他们并没有真正走进课堂，也没有读一些应该读的书。
factory英语单词
factory英语单词英文回答：A factory is an industrial facility where goods are manufactured. It is typically equipped with machinery and tools for the production of specific products. Factories can vary in size, from small workshops to large, complex industrial complexes.Factories play a crucial role in the production of goods and services. They provide the infrastructure and resources necessary to convert raw materials into finished products. Factories can be found in a wide range of industries, including manufacturing, food processing, chemicals, and pharmaceuticals.The history of factories dates back to the Industrial Revolution in the 18th century. Prior to this, goods were primarily produced by hand in small workshops or in the home. The advent of new machinery and technologies, such asthe steam engine and the power loom, led to the development of factories as we know them today.Factories have a significant impact on the economy and society. They provide employment for millions of people and contribute to economic growth. Factories also play a role in technological innovation, as new products and processes are often developed within factory settings.However, factories have also been associated with negative social and environmental impacts. The concentration of workers in factories can lead to health and safety issues, and the emissions from factories can contribute to air and water pollution. In recent years, there has been a growing trend towards the globalization of manufacturing, with factories being built in developing countries to take advantage of lower labor costs. This has led to concerns about the exploitation of workers and the environmental impacts of global supply chains.Despite these challenges, factories remain an essential part of the modern economy. They continue to provide thegoods and services that we rely on, and they play a vital role in technological innovation.中文回答：工厂是一处工业化设施，用于制造商品。
关于led灯的英语作文1000字
关于led灯的英语作文1000字The Evolution and Impact of LED Lighting.In the rapidly advancing world of technology, LED (Light Emitting Diode) lighting has emerged as a revolutionary force, transforming the way we perceive and utilize lighting. Its journey from a mere electronic component to a global phenomenon illustrates the power of innovation and continuous research.LEDs, first discovered in the 1960s, were initially used as indicator lights in electronic devices due to their small size and low power consumption. However, it wasn't until the 21st century that LEDs truly began to shine, thanks to advancements in materials science and manufacturing techniques. This allowed for the creation of high-brightness LEDs that were not only more energy-efficient but also offered a wide range of colors and adjustable brightness levels.The shift from traditional incandescent and fluorescent lighting to LEDs has been nothing short of remarkable. LEDs offer several advantages that make them ideal for a wide range of applications. Firstly, they consume significantly less power, resulting in lower energy bills and reduced carbon emissions. Secondly, LEDs have a longer lifespan, lasting up to 50 times longer than incandescent bulbs, which means less frequent replacements and reduced waste. Lastly, LEDs provide excellent color rendering and can be dimmed without affecting their lifespan or color temperature, offering greater flexibility and control.The impact of LEDs on various industries cannot be overstated. In the architecture and design sector, LEDs have enabled the creation of stunning, energy-efficient lighting solutions that enhance the aesthetics of buildings and spaces. From the vibrant displays of neon signs to the subtle ambient lighting of modern homes, LEDs have provided designers with unprecedented creative freedom.In the automotive industry, LEDs have revolutionized exterior and interior lighting. They are now used inheadlights, taillights, and even as interior ambient lighting, adding a touch of luxury and style to vehicles. The bright, crisp light emitted by LEDs improves visibility and safety on the road.The agricultural industry has also benefited from the adoption of LEDs. Grow lights, powered by LEDs, have allowed farmers to extend the growing season, increase crop yields, and even cultivate crops in environments where natural sunlight is limited. LEDs emit specific wavelengths of light that promote photosynthesis, resulting inhealthier and more vigorous plants.Moreover, LEDs have found their way into our dailylives in the form of indicator lights, displays, and backlighting in electronic devices such as smartphones, televisions, and computers. They have become an integral part of our digital world, enhancing the user experience with their bright, crisp, and energy-efficient lighting.However, the rise of LEDs has not been without its challenges. The initial high cost of LEDs compared totraditional lighting solutions has been a barrier to widespread adoption in some sectors. Furthermore, the disposal of used LEDs can pose an environmental challenge if not handled properly.Nevertheless, as technology continues to advance, the cost of LEDs is expected to decrease further, making them more accessible to a wider range of applications. At the same time, efforts are being made to develop more sustainable manufacturing processes and recycling methods to minimize the environmental impact of LEDs.In conclusion, the journey of LEDs from a simple electronic component to a global phenomenon has been remarkable. Their transformative impact on various industries and our daily lives is a testament to the power of innovation and continuous research. As we move forward, LEDs will continue to revolutionize the way we perceive and utilize lighting, driving further advancements in energy efficiency, sustainability, and design.。
小学上册I卷英语第五单元测验卷
小学上册英语第五单元测验卷英语试题一、综合题(本题有100小题，每小题1分，共100分.每小题不选、错误，均不给分)1.The __________ is essential for human survival and agriculture.2.The _____ (山坡) is covered with beautiful wildflowers.3. A fish lives in ______ (水).4.What is the name of the famous clock tower in London?A. Big BenB. Eiffel TowerC. Leaning TowerD. Tower of PisaA5.What do we call the fourth planet from the sun?A. EarthB. VenusC. MarsD. JupiterC6.In science class, we learned about ________ (机器人). They can help with many________ (任务).7. A solution that has a pH of is considered _______.8.erranean Sea is located between ________ (欧洲) and Africa. The Miss9.The __________ is a major trade center in Asia. (香港)10. A ______ is a large, slow-moving river of ice.11. Depression started in ________ (1929). The Grea12.My __________ (玩具名) is the best __________ (名词) in the world!13.The chemical symbol for osmium is ______.14.The ________ was a key moment in the fight for human rights worldwide.15.What is the name of the famous mountain range in Asia?A. RockiesB. AlpsC. HimalayasD. Andes16.My _______ (猫) loves to snooze by the window.17.My _____ (外婆) has a beautiful garden.18.The Earth's crust is being constantly ______ by natural forces.19. A saturated solution does not change when more solute is ______.20.The _____ (pen/pencil) is on the desk.21.The puppy is ______ with a toy. (playing)22.The chemical symbol for boron is __________.23._____ was the famous queen of ancient Egypt.24.My brother is a member of the ____ (robotics) club.25.The __________ can reveal the history of the Earth's geological formations.26.I think friendship is one of the greatest gifts. Friends support each other through thick and thin. I’m grateful for my friend __________, who always knows how to cheer me up.27.The __________ is the capital city of Brazil. (巴西利亚)28.Which planet has the longest day?A. VenusB. JupiterC. MarsD. Mercury29.What do we call the process of making a cake?A. BakingB. CookingC. BoilingD. FryingA30.The ancient Egyptians built temples for their ________.31.I enjoy ______ (与朋友一起) having fun.32. A __________ is a piece of land surrounded by water on three sides. (半岛)33.We have a ______ (快乐的) gathering for special occasions.34.What is the name of the famous wizarding school in Harry Potter?A. DurmstrangB. BeauxbatonsC. HogwartsD. Ilvermorny35.What is the shape of a basketball?A. SquareB. RectangleC. TriangleD. CircleD36.The cat is _____ (hiding/playing) under the bed.37.How many months are in a year?A. TenB. TwelveC. ElevenD. ThirteenB38. A goat can climb steep ________________ (悬崖).39.What is the primary color of grass?A. RedB. YellowC. BlueD. GreenD40.What is the opposite of hot?A. WarmB. ColdC. CoolD. LukewarmB41. A _______ is a chemical reaction that produces light.42.Light can be ______ (absorbed) by dark surfaces.43.The book is ___ the table. (on)44.The capital of Vietnam is __________.45.The _______ (小牛) plays in the grassy field.46.What is the main source of light for the Earth?A. MoonB. StarsC. SunD. FireC47. A solid has a __________ shape.48.The _____ (大雁) is migrating south for the winter.49.Which animal can be found in the desert?A. PenguinB. CamelC. Polar bearD. DolphinB50.The ______ teaches us about philosophy.51.We celebrate our ______ (生日) with cake.52.Which instrument has keys but is not a piano?A. GuitarB. FluteC. AccordionD. ViolinC53.The main gas emitted by factories is __________.54.I enjoy studying ______ (科学) because it helps me understand how things work.55.We enjoy reading ___. (books)56.What do we call a person who cleans houses?A. GardenerB. CleanerC. ChefD. Mechanic57.What do we use to write on paper?A. PaintB. PencilC. BrushD. Glue58.The chemical formula for glycine is ______.59.My ________ (玩具) helps me learn about colors.60. A chemical reaction requires a change in ______.61.Many plants have adapted to survive in ______ climates. (许多植物已适应在极端气候中生存。
人工智能可能取代哪些工作英语作文
人工智能可能取代哪些工作英语作文With the rapid advancement of technology, artificial intelligence (AI) has become a popular topic of discussion in various industries and sectors. Many experts believe that AI has the potential to revolutionize the way we work and live, and it may even replace some jobs in the future. In this essay, we will explore the jobs that AI might replace in the near future and how this could impact society.One of the most obvious sectors that AI is expected to replace jobs is the manufacturing industry. The use of robots and other forms of automation has already led to a decrease in the number of human workers needed in factories. As AI technology becomes more sophisticated, it is likely that even more manufacturing jobs will be replaced by machines. This could have a significant impact on workers in the industry, as they may find themselves without jobs or with reduced job opportunities.Another sector that is at risk of being affected by AI is the transportation industry. With the development of self-driving cars and trucks, it is possible that many jobs in this sector, such as taxi drivers and truck drivers, could be replaced by automated vehicles. This could have a major impact on the livelihoods ofthousands of workers in the transportation industry, as they may no longer be needed to operate vehicles.Furthermore, the healthcare industry is also at risk of being impacted by AI. With the development of AI-powered diagnostic tools and software, it is possible that some jobs in the medical field, such as radiologists and pathologists, could be replaced by machines. While AI technology could potentially improve the accuracy and efficiency of medical diagnoses, it could also lead to job losses for healthcare workers.In addition to these sectors, AI is also expected to affect the retail industry. With the rise of e-commerce and automated checkout systems, it is possible that jobs in retail stores, such as cashiers and sales associates, could be replaced by AI technology. This could lead to a decrease in the number of job opportunities in the retail sector, as more tasks become automated.Overall, while AI technology has the potential to revolutionize the way we work and live, it is also likely to lead to the replacement of certain jobs in various sectors. It is important for society to prepare for these changes and to adapt to the evolving job market. This could involve retraining workers for new job opportunities in emerging industries or implementing policies to support workers affected by AI-related job losses. Byembracing the potential of AI technology while also safeguarding the well-being of workers, society can navigate the challenges and opportunities posed by AI in the future.。
Viscor LRTH LED 架构沉浸式型H LED灯说明书
P95 Lens OptionTop ViewEnd ViewApplicationsOffice Areas, Hospitals, Retail Stores, Nursing Homes, Classrooms, Factories.Features• Shallow design• Extruded acrylic lens• Standard low voltage dimming (0-10v)• 80+ CRI• Available in 1x4, 2x2, and 2x4 configurations • Type IC suitable for use in insulated ceilings • Room side access for driver compartmentFeatured Options• Emergency lighting battery pack• Optional basket/lenses (see ordering key)Optical SystemRound linear ribbed frosted acrylic diffuser, offers high levels of efficiency and visual comfort. Indirect reflectors are precision formed and contoured to provide soft, lowglare, indirect illumination, while maintaining high-efficiency and a wide, uniform light distribution. Other lens options available (See ordering key on page 2).MountingThis luminaire has been specifically designed for T-Bar applications. Holes provided for chain-mounting support to building structure with integral earthquake clips.ConstructionDie-formed, code gauge steel housing. Precision-formed steel reflector.FinishWhite, polyester powder painted housing.ElectricalLong life LEDs coupled with high efficiency drivers provide quality illumination.Rated to deliver L80 performance > 50,000 hours.Warranty5 year limited warranty. For complete warranty, click here:Product DescriptionA BIOS-enabled commercial-grade, recessed, lay-in T-Bar troffer with modern styling and high visual comfort featuring a single shallow semi-round lens. This technology is targeted for circadian lighting for indoor applications where low-glare, high-quality and ease of installation are required. This IC-rated luminaire’s low-profile design makes it ideal for shallow or obstructed plenum applications.This fixture is equipped with BIOS SkyBlue® circadian LED technology, specifically for increased melanopic lux and circadian stimulus for daytime applications. This luminaire can be configured with either BIO S Static for applications where a constant level SkyBlue® content is desired, or BIOS Dynamic for applications requiring variable SkyBlue® content based on time of day. Provides minimum melanopic (M/P) ratio of >0.7 at 3000K, CRI 80+, R9>90; and cyanosis observation index (COI)less than or equal to 5.4.Approvals• Approved to CSA/UL standards. UL listed for insulated ceilings.• Tested in accordance to IESNA LM-79.• Suitable for damp locationsDesignLights Consortium ® Qualified, check /QPL for qualified configurations.Order KeyPerformance Date Ordering Key Example2x4020L - 2000032L - 3200040L - 4000Driver OptionsB39 Emergency Lighting Battery Pack - LEDLens OptionsRound Ribbed Frosted Acrylic StandardP90 Wide Round Linear Ribbed Frosted AcrylicP95 Frosted Polycarbonate Square Lens (Narrow) P95(W) Frosted Polycarbonate Square Lens (Wide)Other options may be available, consult factory.Specifications and data subject to change without notice.2x22x4EXAMPLE: LRTH2x4-LED840K040LUNV-V114(BI01)LRTH2x2-LED840K032LUNV-V114(BI02)• Static CCT (4000K) fixture, output dimmable to 1%• SkyBlue™ is always presentLRTH2x2-LED840K032LUNV-V114(BI03)• 2-Channel Tunable (4000K - 2700K) fixture dimmable to 1%• SkyBlue™ is always present from 4000k-3000kLRTH2x2-LED840K032LUNV-V114(BI01)• Single-Channel Bio-Dimming from 4000K with SkyBlue™ to >2700K• At 2700K, dim total output to 1%• At 2700K, SkyBlue™ no longer presentV114(BI02)BIOS StaticCircadian LEDV114(BI01)BIOS DynamicCircadianLED + Bio-DimmingV114(BI03)BIOS DynamicTunableCircadian LED(tunable to2700K)Lens OptionsBIOS Static Circadian LED Solution - V114 (BI02)BIOS SkyBlue® Spectrum lighting solutions support proper daytime circadian stimulus, communicating directly with human circadian biology through a non-visual photo receptor in the eye.Static Engine Spectral Power Distribution (3500K)BIOS Static Spectrum Light Engine delivers the industry’s best melanopic-to-photopic (M/P) ratio, with R9 greater than 90 at each color temperature. BIOS Static Spectrum Light Engine is the ideal replacement for static color light fixtures.PeakMelanopsinSensitivityNominal Performance¹ M/P is a ratio that describes the relative melanopic lux (M) versus the photopic lux (P)² COI - Cyanosis Observation IndexBIOS Dynamic Circadian LED Solution - V114 (BI01)BIOS SkyBlue® Dynamic Light Engine provides full daytime circadian stimulus and can be dynamically adjusted via the Bio-Dimming™ module. Using a standard single channel 0-10V dimmer reducing melanopic lux while keeping light and CCT constant3. When the SkyBlue® content has been removed (at 2700K), the light level can be adjusted. The Bio-Dimming™ module also detects the preferred light levels over time and will adjust the high end trim of the system to those preferences.Nominal Performance3 CCT may vary by up to 500K4Value as shown represents COI provided by daytime LED Spectrum.Dynamic Engine Spectral Power Distribution (3500K)80%B i o -a D i m m i n g SensitivityNighttime SPDDaytime SPDBIOS Dynamic Circadian LED + Bio-Dimming™BIOS Dynamic Circadian LED Solution - V114 (BI03)BIOS SkyBlue® Dynamic Light Engine provides full daytime circadian stimulus and can be dynamically adjusted via tunable circadian LED module. Using a standard two channel 0-10V dimmer reducing melanopic lux and adjusting the output light level while keep CCT constant3. The SkyBlue® below 3000K no longer present. The tunable module also detects the preferred light levels over time and will adjust the high end trim of the system to those preferences.Nominal Performance3 CCT may vary by up to 500K4Value as shown represents COI provided by daytime LED Spectrum.BIOS Dynamic Tunable Circadian LED (tunable to 2700K)Dynamic Engine Spectral Power Distribution (3500K)B i o -a D i m m i n g PeakMelanopsin SensitivityDaytime SPD。
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