A Multilayer Study of pCO2 in the Surface Waters of the Yellow and South China Seas in Spring an
基于群体平衡的汽轮机动叶表面盐析颗粒分布特性
2018年第37卷第2期 CHEMICAL INDUSTRY AND ENGINEERING PROGRESS·437·化 工 进展基于群体平衡的汽轮机动叶表面盐析颗粒分布特性胡鹏飞，李勇，曹丽华，吴雪菲（东北电力大学能源与动力工程学院，吉林 吉林 132012）摘要：为深入了解汽轮机动叶内盐析颗粒的微观行为，本文以某超临界汽轮机高压级动叶为研究对象，应用计算流体力学与群体平衡模型耦合方法，对汽轮机动叶内盐析颗粒在流场中的分布进行数值模拟研究，获得了盐析颗粒在动叶内的粒径分布及不同负荷时叶片尾缘处盐析颗粒数量密度分布规律。
模拟结果表明：在汽轮机动叶吸力面附近的盐析颗粒粒径较压力面附近盐析颗粒粒径小，且叶根处颗粒粒径小于叶顶处；动叶压力面的颗粒数量密度呈前缘点尾缘点处大、中间段小的分布规律，并且盐析颗粒在叶片上的数量密度分布最大值并不出现在组分数及粒径最大处，而是出现在平均粒径为110～150μm 的盐析颗粒沉积位置处；当汽轮机30%负荷运行时，粒径40μm 盐析颗粒的数量密度是其在汽轮机额定负荷运行时的1.5倍，而粒径140μm 盐析颗粒的数量密度仅为汽轮机额定负荷运行时的80%。
关键词：汽轮机动叶；盐析颗粒；群体平衡模型；两相流中图分类号：TK26 文献标志码：A 文章编号：1000–6613（2018）02–0437–07 DOI ：10.16085/j.issn.1000-6613.2017-1765Distribution characteristics of salting-out particles on the surface of steamrotor blade based on population balance model （PBM ）HU Pengfei ，LI Yong ，CAO Lihua ，WU Xuefei（School of Energy and Power Engineering ，Northeast Electric Power University ，Jilin 132012，Jilin ，China ）Abstract ：In order to get a better understanding of microscopic behavior of salting-out particles in a steam turbine ，a high-pressure grade rotor blade was employed in a supercritical steam turbine as a research object and the distribution of salting-out particles in the flow field from a steam turbine rotor blade was simulated using CFD-PBM method. The diameter distribution of salting-out particles in a rotor blade and the number density distribution of salting-out particles in the tailed-edge area of rotor blade with different load situations were obtained. The simulation results showed that the salting-out particle diameter near the suction side was smaller than that near the pressure side in a steam turbine rotor blade ，and the salting-out particle diameter at the blade bottom was smaller than that at the blade tip. The particle number density distribution law at the pressure side of rotor blade was presented that the particle number density was larger both at the leading edge and at the tailed-edge of rotor blade while the particle number density was smaller in the middle parts of rotor blade ，and the maximum value of salting-out particle number density distribution did not appear in the position having the maximum component number and particle diameter in the rotor blade ，but it appeared in the positionwhere salting-out particles with the average diameter 110—150μm deposit. When steam turbine was under 30% load operation ，the number density of salting-out particles with 40μm diameter was 1.5第一作者及通讯作者：胡鹏飞（1985—），男，博士研究生，讲师，主要研究方向为汽轮机节能技术与优化运行。
气孔导度增大,胞间co2浓度下降原因
英文回复：The reasons for the increase in the conductivity of the air hole are mainly related to environmental factors and plant physiological mechanisms。
Environmental factors are important for the impact of air—hole conductivity， including light intensity， temperature and humidity。
In conditions of greater and weaker light， and in order to increase CO2 absorption and photocosynthesis efficiency， plants are proactive in increasing air hole guidance。
Under high temperature or low humidity， plants may also increase atmospheric cavity in order to reduce overheating or hydroevaporation in the body。
Other plants have their own physiological mechanisms that also affect the air hole guidance。
When plants are exposed to oxygen deficiency or water coercion， gas exchange is promoted by increasing atmospheric cavity。
火山爆发英语作文
Volcanic eruptions are one of the most powerful and aweinspiring natural phenomena on Earth.They are the result of molten rock,known as magma,forcing its way to the surface from deep within the Earths crust.Heres a detailed composition on volcanic eruptions:Title:The Majestic Fury of Volcanic EruptionsIntroduction:The Earth,a living entity,breathes through its mountains and roars through its volcanoes. Volcanic eruptions are dramatic reminders of the immense forces at work beneath our feet.They can be both destructive and fascinating,shaping the landscape and the climate of our planet.The Process of Eruption:A volcanic eruption begins with seismic activity deep within the Earth.Pressure builds as magma rises through the crust,forcing its way through fissures and faults.When the pressure becomes too great,the volcano erupts,spewing lava,ash,and gases into the atmosphere.Types of Eruptions:1.Explosive Eruptions:These are the most violent,characterized by the release of large amounts of ash and pyroclastic materials.An example is the1980eruption of Mount St. Helens in the United States.2.Effusive Eruptions:These are less dramatic but can be equally destructive.They involve the slow outpouring of lava that spreads over large areas,creating new landforms. The2018eruption of Kilauea in Hawaii is an example.Effects on the Environment:Volcanic eruptions have significant environmental impacts.They can cause local devastation through lava flows and pyroclastic flows,which are fastmoving currents of hot gas and volcanic matter.The ash released can affect air quality and block sunlight, leading to a temporary cooling of the Earths surface,known as a volcanic winter.Impact on Human Life:Human settlements near volcanoes are at risk during eruptions.The destruction of homes, infrastructure,and agriculture can be extensive.However,people have also learned to live with volcanoes,using their fertile soils for agriculture and their geothermal energy for power.Volcano Monitoring and Prediction:Scientists use various methods to monitor volcanic activity,including seismic monitoring, gas emissions analysis,and satellite imagery.While predicting the exact timing of an eruption remains challenging,these tools help in assessing the risk and preparing for potential eruptions.Conclusion:Volcanic eruptions are a testament to the Earths dynamic nature.While they can bring destruction,they also contribute to the creation of new land and the recycling of the Earths crust.Understanding and respecting these forces is crucial for the safety and wellbeing of those living in volcanic regions.Reflection:As we marvel at the power of volcanic eruptions,we are reminded of our place in the natural world.It is a humbling experience that teaches us about the resilience of life and the importance of living in harmony with our planets forces.。
蚌埠2024年11版小学第3次英语第2单元自测题
蚌埠2024年11版小学英语第2单元自测题考试时间：90分钟（总分:120）A卷考试人：_________题号一二三四五总分得分一、综合题(共计100题)1、填空题：The __________ (历史的接受) varies across cultures.2、填空题：The ________ (天气) can change quickly in the mountains.3、听力题：A compound that can accept protons is called an ______.4、填空题：I love to watch the ______ (星空) at night.5、填空题：I can _______ (用英语说) simple sentences.6、听力题：The chemical formula for hydrogen peroxide is ________.7、听力题：The train is very ________.8、cultural landscape) reflects human interaction with nature. 填空题：The ____9、What do we call a person who studies stars?A. BiologistB. AstronomerC. GeologistD. Chemist10、听力题：A ____ has a long tongue and catches insects.11、填空题：The __________ was a significant event in the fight for civil rights in America.(华盛顿大游行)12、填空题：The _____ (花朵开放) signals the arrival of spring.13、填空题：My cousin is . (我的表兄弟/表姐妹是。
高三英语文章全球问题单选题50题
高三英语文章全球问题单选题50题1.Global warming is causing the sea level to rise. Which of the following is NOT a possible consequence?A.Loss of coastal landB.Increased frequency of hurricanesC.Decrease in air pollutionD.Disruption of marine ecosystems答案：C。
全球变暖导致海平面上升，会造成沿海土地流失、飓风频率增加以及海洋生态系统被破坏。
而海平面上升不会直接导致空气污染减少。
2.The depletion of the ozone layer is mainly caused by________.A.emission of carbon dioxideB.release of chlorofluorocarbonsC.burning of fossil fuelsD.cutting down of forests答案：B。
臭氧层的消耗主要是由释放氟氯烃引起的。
二氧化碳排放、燃烧化石燃料主要导致全球变暖；砍伐森林主要影响生态平衡等方面。
3.Which of the following is a measure to address climate change?A.Increasing the use of plastic bagsB.Building more coal-fired power plantsC.Planting more treesD.Dumping waste into the ocean答案：C。
种植更多的树可以吸收二氧化碳，有助于应对气候变化。
增加塑料袋使用、建设更多的燃煤发电厂、向海洋倾倒废物都会加剧环境问题。
4.Deforestation can lead to________.A.increased biodiversityB.more fertile soilC.flooding and soil erosionD.cooler climate答案：C。
多层球形二次电子测量装置的栅网电子透过率仿真研究
第 41 卷第 2 期航 天 器 环 境 工 程Vol. 41, No. 2 2024 年 4 月SPACECRAFT ENVIRONMENT ENGINEERING219 https:// E-mail: ***************Tel: (010)68116407, 68116408, 68116544多层球形二次电子测量装置的栅网电子透过率仿真研究刘斯盛1，陈宝华1，齐 鑫1，彭卫平2,1，杜嘉余3，马彦昭1*，张 涛1*（1. 武汉大学 动力与机械学院，武汉 430072； 2. 武汉晴川学院 机电工程学院，武汉 430204；3. 北京卫星环境工程研究所，北京 100094）摘要：精确测量材料的二次电子发射系数（SEY）对研究航天器表面材料充放电具有重要意义。
在二次电子测量装置中，栅网电子透过率是影响材料SEY测量精度的重要参数。
文章通过仿真计算对一种多层球形SEY测量装置中影响栅网电子透过率的因素进行研究，并对栅网网格参数进行优化。
结果表明：栅网偏压对栅网电子透过率的影响较小；栅网网格参数是影响栅网电子透过率的主要因素，栅网线径为0.025 mm、格线间距为1 mm时栅网电子透过率达到最大。
研究可为优化SEY测量装置设计提供参考。
关键词：二次电子测量；二次电子发射系数；栅网电子透过率；仿真计算中图分类号：O461; P354.4文献标志码：A文章编号：1673-1379(2024)02-0219-06 DOI: 10.12126/see.2023145Simulation study on electron transmittance through grid for a multi-layer spherical secondary electron measurement deviceLIU Sisheng1, CHEN Baohua1, QI Xin1, PENG Weiping2,1, DU Jiayu3, MA Yanzhao1*, ZHANG Tao1*(1. School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China;2. School of Mechanical and Electrical Engineering, Wuhan Qingchuan University, Wuhan 430204, China;3. Beijing Institute of Spacecraft Environment Engineering, Beijing 100094, China)Abstract: To accurately measure the secondary electron yield (SEY) is of great significance for studying the charge and discharge of spacecraft surface materials. The electron transmittance through grid in the secondary electron measurement device is an important factor affecting the measurement accuracy of the SEY of materials. In this paper, the causes of influencing the electron transmittance through grid in a multi-layer spherical SEY measurement device was simulated by calculation, and the geometry parameters of grid were optimized. The results show that the grid bias exhibits little effect on the electron transmittance through grid, whereas the grid geometry parameters are the main influencing factor. When the grid wire is 0.025 mm in diameter and the grid spacing is 1 mm, the electron transmittance reaches the maximum. The proposed research may provide a reference for optimizing the design of SEY measurement device.Keywords: secondary electron measurement; secondary electron yield (SEY); electron transmittance through grid; simulation calculation收稿日期：2023-09-18；修回日期：2024-03-18基金项目：中国航天科技集团应用创新计划项目（编号：6230114001）；可靠性与环境工程技术重点实验室基金项目（编号：6142004210201）引用格式：刘斯盛, 陈宝华, 齐鑫, 等. 多层球形二次电子测量装置的栅网电子透过率仿真研究[J]. 航天器环境工程, 2024, 41(2): 219-224LIU S S, CHEN B H, QI X, et al. Simulation study on electron transmittance through grid for a multi-layer spherical secondary electron measurement device[J]. Spacecraft Environment Engineering, 2024, 41(2): 219-2240 引言航天器表面材料充放电可能导致设备内部电子系统中的控制、指令以及数据等分系统发生异常或故障，严重时会危及航天器的正常运行[1-4]。
The chemistry of surfactants and colloids
The chemistry of surfactants andcolloidsSurfactants and colloids are two terms that are commonly used in the field of chemistry. They are very important in many industrial applications and play a vital role in our everyday lives. Surfactants are compounds that can reduce the surface tension of a liquid and have many different functions, while colloids are small particles that are dispersed throughout a medium. This article will explore the chemistry of surfactants and colloids, their properties, and how they are used in various applications.What are Surfactants?Surfactants are compounds that are made up of both hydrophilic and hydrophobic regions. The hydrophilic region of the compound is attracted to water, while the hydrophobic region is attracted to oil. This unique structure gives surfactants their ability to reduce the surface tension of a liquid, which can be very important in many different applications.One of the most common types of surfactants is soap, which is used for cleaning. Soap molecules consist of a hydrophobic tail and a hydrophilic head. When soap is added to water, the hydrophobic tail is attracted to dirt and oil, while the hydrophilic head is attracted to water. This causes the dirt and oil to be lifted off the surface and suspended in the water, making it easy to clean away.Another important use of surfactants is in the formation of emulsions. Emulsions are mixtures of two liquids that would not normally mix, such as oil and water. Surfactants can be used to form stable emulsions by reducing the surface tension between the two liquids. This can be very important in many different industries, including food, pharmaceuticals, and cosmetics.Properties of ColloidsColloids are small particles that are dispersed throughout a medium. They are larger than molecules but smaller than particles that can be seen with the naked eye. Colloids can be formed by a variety of different processes, including precipitation and condensation.One of the unique properties of colloids is their ability to scatter light. This is known as the Tyndall effect. When light is shone through a colloid, it is scattered in many different directions. This makes colloids visible to the naked eye, even though their individual particles are too small to see.Another important property of colloids is their stability. Colloidal particles can be very small and have a large surface area compared to their volume. This can make them very reactive and prone to aggregating and clumping together. However, they are often stabilized by electrostatic or steric repulsion forces, which prevent them from coming together and forming larger particles.Uses of ColloidsColloids have many different applications in a variety of industries. One example is in the production of paints and coatings. Colloidal particles can be used to give paints and coatings their desired properties, such as opacity and glossiness. They can also be used to improve the adhesion of the paint to the surface being painted.Another important use of colloids is in the medical field. Colloids can be used as drug delivery systems, where the drug is dispersed throughout a colloidal medium. This can help to improve the solubility of the drug and make it easier to transport to the target site. Colloids can also be used as contrast agents for medical imaging, where their scattering properties can help to make certain tissues or structures more visible.ConclusionSurfactants and colloids are two important areas of chemistry that have many different applications in industry and everyday life. Surfactants are compounds that can reduce the surface tension of a liquid and have many different functions, while colloids are small particles that are dispersed throughout a medium. Colloids are used in a varietyof different industries, including paints and coatings, and the medical field. Understanding the chemistry of surfactants and colloids is important for developing new applications and improving existing ones.。
高三英语科学前沿动态引人关注解读单选题80题(答案解析)
高三英语科学前沿动态引人关注解读单选题80题(答案解析)1.Self-driving cars are considered as one of the most important inventions in the field of transportation. “Self-driving” means _____.A.driving by oneselfB.driving without a driverC.driving with a driverD.driving slowly答案：B。
“Self-driving”表示自动驾驶，即“driving without a driver”，A 选项“driving by oneself”是自己驾驶，需要人来操作；C 选项“driving with a driver”是有司机驾驶；D 选项“driving slowly”是缓慢驾驶。
本题考查对新科技名词“Self-driving”的理解。
2.Artificial intelligence is widely used in various fields. “Artificial intelligence” is abbreviated as _____.A.AIB.IAC.AED.EA答案：A。
“Artificial intelligence”的缩写是“AI”。
B 选项“IA”不是“Artificial intelligence”的缩写；C 选项“AE”一般指音频特效等；D 选项“EA”一般指游戏公司等。
本题考查对新科技名词“Artificial intelligence”缩写的掌握。
3.3D printing technology can create complex objects. “3D printing” is also known as _____.A.three-dimensional printingB.three-dimension printingC.third-dimensional printingD.third-dimension printing答案：A。
Fluid-Structure Interaction and Dynamics
Fluid-Structure Interaction and Dynamics Fluid-structure interaction (FSI) and dynamics is a complex and fascinating field that involves the study of the interaction between a fluid and a solid structure. This interaction can occur in a wide range of natural and engineered systems, from the flow of blood through arteries to the behavior of aircraft wings in flight. Understanding and predicting the behavior of these systems is crucialfor a wide range of applications, from designing more efficient and stable structures to improving the performance of medical devices. One of the key challenges in FSI and dynamics is the need to develop accurate and efficient numerical methods for simulating the behavior of these systems. This requires a deep understanding of both fluid mechanics and structural mechanics, as well asthe ability to develop and implement complex algorithms that can accuratelycapture the interactions between the fluid and the structure. Researchers in this field are constantly pushing the boundaries of computational methods, seeking to develop new techniques that can provide more accurate and reliable predictions of FSI behavior. In addition to the computational challenges, FSI and dynamics also present significant experimental and theoretical challenges. Experimental studies of FSI behavior often require the development of specialized test rigs and measurement techniques, as well as the ability to interpret complex and often non-linear data. Theoretical studies, on the other hand, require the development of new mathematical models and analytical techniques that can accurately capture the behavior of FSI systems. Both experimental and theoretical studies in this field require a deep understanding of the underlying physics and a creative approach to problem-solving. From a practical perspective, FSI and dynamics have a wide range of applications in engineering and science. For example, in the field of aerospace engineering, understanding the behavior of FSI systems is crucial for designing more efficient and stable aircraft and spacecraft. In the field of civil engineering, FSI studies are important for designing more resilient and durable structures, such as bridges and offshore platforms. In the field of biomedical engineering, FSI studies are crucial for developing more effective medical devices, such as artificial heart valves and drug delivery systems. The study of FSI and dynamics also has important implications for our understanding of the naturalworld. For example, understanding the behavior of FSI systems is crucial for understanding the behavior of natural systems such as the flow of blood through arteries and the behavior of marine organisms in water. By studying FSI and dynamics, researchers can gain new insights into the fundamental principles that govern the behavior of these systems, leading to new discoveries and innovations in a wide range of fields. In conclusion, the study of fluid-structureinteraction and dynamics is a complex and multifaceted field that presents a wide range of challenges and opportunities. From the development of new computational methods to the practical applications in engineering and science, FSI and dynamics play a crucial role in advancing our understanding of the natural world and developing new technologies that can improve our lives. As researchers continue to push the boundaries of this field, we can expect to see new discoveries and innovations that will have a profound impact on a wide range of fields.。
2024年高一英语气候科学研究进展单选题40题
2024年高一英语气候科学研究进展单选题40题1.Climate change is mainly caused by the increase in _____.A.greenhouse gasesB.ozone layerC.pollutantsD.water vapor答案：A。
温室气体的增加是气候变化的主要原因。
选项B 臭氧层主要起到阻挡紫外线的作用，与气候变化的主要原因关系不大。
选项 C 污染物的范围比较广，不是气候变化的主要原因。
选项 D 水汽也不是气候变化的主要原因。
2.The phenomenon of global warming is closely related to _____.A.carbon dioxide emissionsB.air pollutionC.water pollutionD.soil pollution答案：A。
全球变暖现象与二氧化碳排放密切相关。
选项B 空气污染不是全球变暖的直接主要原因。
选项C 水污染与全球变暖关系不大。
选项D 土壤污染也与全球变暖没有直接关系。
3.The term “El Niño” refers to _____.A.a weather patternB.a climate change phenomenonC.an ocean currentD.a type of storm答案：A。
“厄尔尼诺”是一种天气模式。
选项B 它不是气候变化现象本身。
选项C 它不是洋流。
选项D 它不是一种风暴。
4.The “greenhouse effect” is caused by _____.A.the absorption of heat by the atmosphereB.the reflection of sunlight by the EarthC.the emission of heat by the SunD.the cooling of the Earth答案：A。
小学下册E卷英语第6单元期末试卷
小学下册英语第6单元期末试卷英语试题一、综合题(本题有50小题，每小题1分，共100分.每小题不选、错误，均不给分)1 A ______ (生态区域) supports specific plants and animals.2 I feel _______ when I help others.3 My friend is a ______. He enjoys participating in sports.4 What is the name of the fairy tale character who had a sleeping curse?A. Snow WhiteB. Sleeping BeautyC. CinderellaD. Rapunzel答案:B5 A solution is a homogeneous ______ of two or more substances.6 My _____ (伯父) takes me fishing at the lake during summer. 我伯父在夏天带我去湖边钓鱼。
7 We strive for ________ (excellence) in our work.8 The chemical symbol for platinum is ____.9 What is the name of the famous tower in Paris?A. Leaning Tower of PisaB. Burj KhalifaC. Eiffel TowerD. Empire State Building答案: C10 The _____ (海星) can regenerate lost arms over time.11 The birds are ______ (singing) in the trees.12 The ancient civilizations of the Near East are recognized for their ________ achievements.13 Planting native ______ (植物) supports local wildlife.14 A reaction that produces a solid precipitate is called a ______ reaction.15 The capital city of India is __________.16 __________ help plants absorb water and nutrients from the soil.17 What celestial object is known for its bright tail?A. AsteroidB. CometC. StarD. Moon18 The __________ (历史的启示) guides decisions.19 A weak acid does not fully ______ in solution.20 The chemical symbol for phosphorus is _______.21 Which animal is known for its long tail?A. ElephantB. MonkeyC. DogD. Cat答案:B22 My favorite animal is a _______ (狮子).23 I like to go ___. (camping)24 I like to go camping in the ______ (森林) and explore nature. It’s a great way to relax and unwind.25 The sun is very _____ (bright/dim).26 We have a _____ (聚会) planned for summer.27 The baby is ________ in the crib.28 Planting flowers can improve local ______ (生态系统).29 I want to learn how to ________ (设计).30 The ______ (水果园) is full of apples.31 What do you call the process of changing from a caterpillar to a butterfly?A. TransformationB. MetamorphosisC. EvolutionD. Development32 I can stack my ________ (玩具名称) in different ways.33 A wave can change direction when it passes into a ______ medium.34 She is _____ (running) a race.35 What is the name of the chemical element with the symbol H?A. HeliumB. HydrogenC. GoldD. Silver答案:B36 My _____ (魔方) is difficult to solve.37 How many zeros are in one hundred?A. OneC. ThreeD. Four38 What is the opposite of "light"?A. BrightB. HeavyC. SoftD. Hard答案: B. Heavy39 What do we call the person who studies the weather?A. AstronomerB. BiologistC. MeteorologistD. Geologist答案:C40 A __________ is a reaction that involves oxidation and reduction.41 What is the term for the study of stars and planets?a. Biologyb. Chemistryc. Astronomyd. Geology答案:c42 The _______ (The American Civil War) was fought over the issues of slavery and states' rights.43 Which of these animals can fly?B. BirdC. DogD. Cat44 An exothermic reaction feels _____ to the touch.45 The ancient Romans built ________ for public entertainment.46 What do you call a baby cat?A. PupB. KittenC. CubD. Calf答案:B. Kitten47 A ______ (猴子) loves to eat fruit.48 How many planets are in our solar system?A. 8B. 9C. 10D. 11答案:A49 In winter, some trees lose their _____ (叶子).50 The outer layer of an atom is made up of ______.51 A reduction reaction involves the ______ of electrons.52 What is the capital of Belize?a. Belmopanb. Belize Cityc. San Ignaciod. Corozal答案:a53 A chemical reaction that requires heat is called ________.54 The bison roams in the ______.55 A _____ (植物访谈) can share knowledge among communities.56 What is the primary color of a fire truck?A. BlueB. RedC. YellowD. Green答案: B. Red57 I can ______ (骑) a horse.58 My brother is a passionate __________ (科技爱好者).59 My sister is very _____ (友善) to everyone.60 My _________ (玩具) is a special gift from my mom.61 My ________ (玩具名称) helps me create wonderful stories.62 The _____ (fruit/vegetable) is fresh.63 The ________ was a transformative moment in the history of civil rights.64 A ________ (湿地) is a low-lying area where water collects.65 The kids are _____ in the park. (running)66 What is the capital of Denmark?A. CopenhagenB. AarhusC. OdenseD. Aalborg67 A _______ grows best in sandy soil.68 When it rains, I like to jump in ______ (水坑) and splash around. It makes me feel ______ (开心).69 My brother loves to __________ (练习) soccer with friends.70 The ______ (小黄蜂) buzzes around the colorful ______ (花朵).71 A ______ (自然保护区) protects plant species.72 The _______ (猫头鹰) hoots at night.73 The first person to discover America was _______ Columbus.74 ____(Glaciers) can shape valleys over thousands of years.75 A compound that can donate hydroxide ions is called a ______.76 I enjoy _______ (在公园散步).77 What do we wear on our feet?A. HatB. GlovesC. ShoesD. Belt答案:C. Shoes78 A _____ (森林) is full of many different kinds of plants.79 The dog loves to chase ______ (balls).80 A ____(cliff) is a steep face of rock or earth.81 A solar flare is a sudden eruption of energy from the ______.82 The density of a substance is its mass per _____.83 The chemical formula for sodium chloride is ______.84 I enjoy _______ (打篮球) with my friends.85 The cat is ______ (sleeping) on my lap.86 What is the main purpose of a map?A. To tell timeB. To show directionsC. To cookD. To read答案: B87 I like to practice ______ (写作) stories. It helps me improve my language skills and creativity.88 The process of changing from a gas to a liquid is called ______.89 My cousin is a great __________ (活动家).90 The salad is very _______ (healthy).91 The seahorse is unique because the males carry the ________________ (幼崽).92 The __________ (地理知识) helps us understand our world.93 I enjoy playing with my ________ when it rains.94 Energy can be transformed from one form to ______.95 In autumn, the leaves turn ______ (黄色).96 I can experience joy every day with my ________ (玩具).97 The capital of Greece is __________.98 What do you call a liquid that can dissolve other substances?A. SolventB. SoluteC. MixtureD. Solution答案:A99 The chemical symbol for iron is __________. 100 My favorite _____ (fruit) is banana.。
小学上册P卷英语第五单元寒假试卷(有答案)
小学上册英语第五单元寒假试卷(有答案)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 beach is _______ (适合游泳)。
2.Have you ever touched a _____ (温顺的动物)?3.The concept of climate justice addresses the ethical dimensions of ______ change.4. A ________ (植物教育活动) fosters community engagement.5.What do we call the time it takes for the Earth to complete one orbit around the sun?A. DayB. MonthC. YearD. Season答案: C6.Mount Kilimanjaro is located in ________ (坦桑尼亚).7.Matter can exist in different states, including solid, liquid, and ________.8. A _______ (小斑马) has unique stripes.9.The ________ (situation) is challenging.10. A ______ (青蛙) can camouflage itself among leaves.11.We are going to the ________ today.12.What do we call the study of plants?A. ZoologyB. BotanyC. AnatomyD. Ecology答案:B13.My aunt is a great __________ (组织者) for family gatherings.14.The _____ (clock) is ticking.15.The _______ (The Harlem Renaissance) showcased African American culture and arts.16.What do we call a group of stars?A. GalaxyB. ClusterC. ConstellationD. Nebula答案: C17.What is the name of the sweet treat made with cream and sugar?A. PuddingB. FlanC. CustardD. Whipped Cream答案: C18. A squirrel collects _____ for winter.19.What do we call the process of breaking down food into smaller molecules?A. DigestionB. AbsorptionC. AssimilationD. Metabolism答案:A20.What do we call the outer layer of the Earth?A. CoreB. MantleC. CrustD. Atmosphere答案:C21.The chemical formula for ammonium phosphate is _______.22. A _____ is a region with specific geographic features.23.The _____ (植物产品) include many useful items.24.Water is made up of two hydrogen atoms and one ________ atom.25.The girl is very ________.26.What is the name of the famous British scientist who formulated the laws of motion?A. Isaac NewtonB. Albert EinsteinC. Galileo GalileiD. Stephen Hawking答案:A27.The _____ (藤蔓) climbs the fence beautifully.28.The kitten is _____ with a ball of yarn. (playing)29.The __________ is a large area of land used for agriculture.30.The capital of the Netherlands is __________.31.The sky is ___. (blue)32.Alexander the Great created one of the largest __________ in history. (帝国)33.I enjoy ________ (画画) in my free time.34.I want to ________ (share) my experiences.35.I enjoy _______ (阅读) books about history.36.The ancient Greeks participated in ________ to showcase their athletic skills.37.I love visiting toy museums to see rare and ________ (形容词) toys.38.riverbank) is the land along the edge of a river. The ____39.My friend is very __________ (好奇的) about science.40.The ancient Greeks used _____ to teach moral lessons.41.In a chemical equation, the products are shown on the _______.42.My ________ (玩具名称) is a fun way to explore different stories.43.The ________ (植物科普活动) promotes knowledge.44.ta Stone helped decode ________ (埃及象形文字). The Rose45.My sister is my best _______ who is always there to cheer me up.46.I enjoy playing games with my _______ (朋友). We have a lot of _______ (名词) together.47.What do you call a baby swan?A. CygnetB. DucklingC. GoslingD. Flapper答案: A48.I enjoy hiking in the mountains to see stunning ______ (风景).49.What do you call the process of producing energy from food?A. DigestionB. AbsorptionC. FermentationD. Respiration答案: A50.The toy is ________ and colorful.51.Catalysts are not consumed in a ______.52.The dog is ___ with its owner. (playing)53.The _____ (teacher/student) is helpful.54.Parrots like to eat ______ (坚果).55.The Sun's energy drives the Earth's ______.56.The __________ is a large desert in Australia. (大沙漠)57.I want to _______ (学习)如何游泳。
小学上册第六次英语第6单元自测题
小学上册英语第6单元自测题英语试题一、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.Which food is made from milk?A. BreadB. CheeseC. RiceD. Pasta2.She _____ (draws) very well.3. A _____ (小猫) pounces on a toy.4.desert) is a dry area with little rainfall. The ____5. A chemical reaction that releases heat is called an ________ reaction.6.He is wearing ______ shoes. (red)7.The _______ of light can be tested by passing it through different materials.8.What is the name of the famous statue in Rio de Janeiro?A. Christ the RedeemerB. Statue of LibertyC. DavidD. Venus de MiloA Christ the Redeemer9.The ________ is a small animal.10.How many months are there in a year?A. TenB. TwelveC. ElevenD. NineB11.What do we call the line that divides the Earth into the Northern and Southern Hemispheres?A. EquatorB. Prime MeridianC. Tropic of CancerD. Tropic of Capricorn12.My teacher is a ______. She encourages us to do our best.13.What is a baby dog called?A. KittenB. PuppyC. CubD. ChickB14.__________ (气体) can expand to fill any container.15. A circuit breaker stops the flow of ______.16.My pet ______ (猫) loves to sit in my lap.17.What do you call the person who teaches you in school?A. DoctorB. TeacherC. FarmerD. EngineerB18.The cat loves to chase a _________. (激光点)19.What do we call the act of giving someone a gift?A. PresentingB. BestowingC. OfferingD. All of the AboveD20.He is a pilot, ______ (他是一名飞行员), flying high in the sky.21.I enjoy cooking ________ (简单的菜) with my mom.22.ts can grow rapidly under the right ______. (某些植物在适当的条件下可以迅速生长。
小学下册D卷英语第四单元真题(含答案)
小学下册英语第四单元真题(含答案)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.My sister has a __________ (好心) nature.2.The tree is very ___. (tall)3.The __________ is formed from the remains of plants and animals.4.What is 9 + 1?A. 7B. 8C. 9D. 10答案:D5.What is the opposite of "fast"?A. QuickB. SlowC. SpeedyD. Rapid答案:B6.The flowers are blooming ___. (beautifully)7.What is the name of the famous mountain located in Africa?A. KilimanjaroB. DenaliC. EverestD. Elbrus8. A ______ is a cold-blooded animal that lays eggs.9.Which animal is considered a reptile?A. FrogB. LizardC. SalmonD. Sparrow10.The __________ is the part of a flower that produces seeds.11.The Earth's atmosphere is crucial for protecting ______ life.12.The __________ is a body of water that is part of the ocean.13.The chocolate is ___ (melted).14.My ________ (玩具) is a gateway to happiness.15.The process of ______ can lead to the creation of fossils.16. A chemical reaction can result in a temperature ______.17.What is the name of the famous bear who loves honey?A. Paddington BearB. Winnie the PoohC. Yogi BearD. Baloo答案:B18.What is the term for the study of human societies?A. SociologyB. PsychologyC. AnthropologyD. History答案:A19.How many legs does a spider have?A. SixB. EightC. TenD. Four答案:B20.I have a ________ in my pocket.21.What is the name of the famous volcano in Italy?A. Mount FujiB. Mount St. HelensC. Mount VesuviusD. Mount Kilimanjaro答案:C22.I built a race track for my toy ____. (玩具名称)23.Plants can be very _______ and grow quickly.24.What is the main gas used in balloons?A. OxygenB. HeliumC. NitrogenD. Hydrogen答案:B25.What is the name of the bird that cannot fly and is native to New Zealand?A. KiwiB. EmuC. OstrichD. Penguin26.What is the capital of Djibouti?A. DjiboutiB. Ali SabiehC. TadjouraD. Dikhil答案:A27.Which instrument has keys?A. GuitarB. DrumsC. PianoD. Flute答案:C28.My dad drives a ________ (汽车).29. A _______ is a type of chemical reaction that involves the transfer of electrons.30.We will visit the ___. (planetarium) next month.31.The atomic weight of an element is measured in ______.32.What is the capital of Japan?A. BeijingB. SeoulC. TokyoD. Bangkok答案:C33.The Earth's crust is constantly being reshaped through natural ______.34.n Wall divided __________ for many years. (东德和西德) The Berl35.My sister is _____ (older/younger) than me.36.What do we call a large tree that grows in the rainforest?A. BushB. ShrubC. PalmD. Canopy答案:D37.What do we call the study of computers?A. TechnologyB. Computer ScienceC. EngineeringD. Mathematics答案:B Computer Science38.The ______ is a symbol of peace.39.The Andromeda Galaxy is moving towards the ______.40.The stars are ___ (twinkling/shining).41. A _______ (小骆驼) can go long without water.42.The leaves change _______ in the fall, creating a beautiful scenery.43.The __________ is a large desert located in northern Africa. (撒哈拉沙漠)44.What is 20 5?A. 10B. 15C. 25D. 30答案:B45.What do you call a young owl?A. OwletB. ChickC. FledglingD. Nestling46.The _______ of light can create various effects in photography.47.We have a ______ in the garden. (pool)48.I often tell my friends, "You can call me ______ anytime!" (我经常告诉我的朋友：“你随时可以叫我！”)49. A molecule with two hydrogen atoms and one oxygen atom is called ______.50. A sloth is very ______ (慢) and sleeps a lot.51. A _______ change results in the formation of new substances.52.What shape is a basketball?A. SquareB. TriangleC. CircleD. Oval答案:C53.Where do penguins live?A. DesertB. ForestC. ArcticD. Antarctica答案:D54.What is the capital of Italy?A. VeniceB. FlorenceC. RomeD. Milan55.What is the capital of Hungary?A. BudapestB. DebrecenC. SzegedD. Miskolc答案:A56.The capital city of Hungary is __________.57.The ox is used for _________ (耕地).58.What do we call the place where we buy books?A. LibraryB. StoreC. SchoolD. Park59.She is a great ___. (singer)60.My sister is my best _______ because we laugh together.61.What do we call a scientist who studies the universe?A. AstronomerB. AstrophysicistC. CosmologistD. Geologist答案:A62.I wish to travel to _______ (地方) one day. I want to experience its _______ (文化).63.The lemur has large _________. (眼睛)64.The _______ (章鱼) has eight arms.65.The cupcakes are very ___. (sweet)66.We should _______ (关心) our elders.67.We have a ______ (精彩的) event planned for next month.68.I love to ________ (探索) new places.69.What is the name of the famous American author who wrote "The Great Gatsby"?A. F. Scott FitzgeraldB. Ernest HemingwayC. Mark TwainD. John Steinbeck答案:A70.What color is a polar bear?A. WhiteB. BrownC. BlackD. Gray71.The chemical formula for calcium carbonate is ______.72.s built their empire in _____. The Azte73.I enjoy playing ______ (团体运动) with my friends after school.74.We can _______ a kite in the wind.75.What do you call a picture taken with a camera?A. ImageB. DrawingC. PaintingD. Sketch答案:A76. A _____ (植物探索活动) can spark interest in botany.77.What is the term for a person who studies the ocean?A. Marine biologistB. OceanographerC. GeologistD. Biologist答案:B78.The _____ (cucumber) is crunchy.79. A _______ (鸟) sings sweet melodies.80.What do we call the time it takes for the Earth to complete one orbit around the sun?A. YearB. MonthC. DayD. Hour答案:A81.What is the main ingredient in a cake?A. SugarB. FlourC. ButterD. Egg82. A rabbit has big _____.83.The ferret explores every ______ (角落) of the house.84. A solution is _____ (homogeneous) because it has a uniform composition.85.What is the main ingredient in cereal?A. MilkB. GrainsC. SugarD. Fruit86.The ____ is a small creature that hides under leaves.87.We will go ______ for ice cream after dinner. (out)88.The _____ can also be seen during the day.89.Erosion can be caused by wind, water, and ______.90.The crow is known for being very _______ (聪明).91.What do we call the act of joining two things together?A. ConnectionB. AttachmentC. BondingD. Linking答案:D92.What is the main ingredient in a Caesar salad?A. LettuceB. ChickenC. CroutonsD. Dressing93.What is the capital of Namibia?A. WindhoekB. SwakopmundC. Walvis BayD. Oshakati答案:A94.What is 15 - 5?A. 10B. 11C. 12D. 13答案:A95.What do you call the place where animals are kept for public display?A. ZooB. FarmC. ParkD. Sanctuary96.The ________ (生态) of oceans is complex.97.His favorite food is ________.98.The balloons are ______ (floating) in the air.99.The cat curls up on a _____ soft blanket.100.My cousin is very __________ (有追求).。
高一英语地球科学单选题50题
高一英语地球科学单选题50题1. In a science research on the Earth, the part of the Earth that is closest to the surface and consists of solid rocks is called _.A. mantleB. crustC. coreD. magma答案：B。
解析：“crust”指的是地壳，是地球最接近表面且由坚硬岩石组成的部分。
“mantle”是地幔，位于地壳之下；“core”是地核，是地球的中心部分；“magma”是岩浆，并非最接近地球表面的部分，所以正确答案是B。
2. Scientists believe that the _ is mainly composed of iron and nickel.A. crustB. mantleC. outer coreD. lithosphere答案：C。
解析：外核（outer core）主要由铁和镍组成。
地壳（crust）主要是岩石组成；地幔（mantle）成分与外核不同；岩石圈（lithosphere）包含地壳和上地幔顶部，其成分不是主要为铁和镍，所以C正确。
3. During the popular science lecture, it was mentioned that the _ is a semi - fluid layer between the crust and the core.A. magmaC. inner coreD. asthenosphere答案：B。
解析：地幔（mantle）是位于地壳和地核之间的半流体层。
岩浆（magma）是存在于地幔上部等部分的熔融物质，不完全等同于地幔；内核对 inner core）不是地壳和地核之间的层；软流圈asthenosphere）是地幔中的一部分，不如地幔这个概念全面，所以答案是B。
阅读理解(科普环保)练习_英语考试_外语学习含解析
阅读理解(科普环保)练习_英语考试_外语学习含解析一、高中英语阅读理解科普环保类1．犇犇阅读下列短文，从每题所给的A、B、C和D四个选项中，选出最佳选项。
Supercomputers which can analyse blood samples and predict which patients are likely to become seriously ill could save tens of thousands of lives a year, it was revealed last night, according to The Daily Express.The artificial intelligence (AI) system, developed at University College London and set to be piloted in NHS hospitals later this year, will screen "at risk" patients so doctors can take early action to prevent death or serious illness. Prof Young, a consultant surgeon at Southend University Hospital, said: "I am so excited about this form of technology." Instead of people getting sick or dying because they are not picked up in time, this will allow us to step in earlier which will save lives and an enormous amount of money. "I think the potential of AI in healthcare like this is as big as the Industrial Revolution was—and signals a completely new example in the way we manage healthcare."The technology is the brainchild of Dr Vishal Nangalia, a consultant at the Royal Free Hospital in London. He used AI to analyse a billion stored blood samples from 20 different UK hospital trusts dating back up to 12 years. Computers assess blood test results by picking up subtle changes in red and white blood cells, suggesting a patient is going downhill.He found the technique forecast outcomes of patients with kidney problems with up to 95 per cent accuracy. Traditional methods highlighting serious patient concerns picked up as few as 16 percent of patients who went on to die. "This gives us the opportunity not only to save lives but to prevent serious illness, making the health service not only safer but more efficient." Prof Young said, "Instead of waiting for people to get worse, we will be able to treat them earlier."（1）What does the underlined phrase "screen" in Paragraph2 mean?A. comfortB. treatC. spotD. nurse（2）How do supercomputers help save lives?A. By storing blood samples.B. By analyzing patients' cases.C. By observing changes in blood cells.D. By assisting doctors with their operations.（3）Why did Professor Young mention the Industrial Revolution?A. To show the influence of AI.B. To stress the importance of health care.C. To introduce the topic of supercomputers.D. To present the achievement he has accomplished.（4）What do we know about the new technology?A. It helps patients recover earlier.B. It has helped save thousands of lives.C. It will promote the health service greatly.D. It is intended for patients with kidney diseases.【答案】（1）C（2）C（3）A（4）C【解析】【分析】本文是一篇说明文，介绍超级计算机能够分析血样并预测哪些病人可能会患上重病，每年可以挽救数万人的生命。
金华“PEP”2024年10版小学五年级下册D卷英语第4单元期末试卷
金华“PEP”2024年10版小学五年级下册英语第4单元期末试卷考试时间：90分钟（总分:120）A卷考试人：_________题号一二三四五总分得分一、综合题(共计100题共100分)1. 填空题：I can ______ (自我提升) through feedback.2. 填空题：My friend loves __________ (帮助别人).3. 选择题：What is the capital city of Russia?A. MoscowB. St. PetersburgC. NovosibirskD. Kazan答案: A4. 选择题：What is the capital of Norway?a. Oslob. Stockholmc. Helsinkid. Copenhagen答案:a5. 听力题：A chemical reaction involves the breaking and forming of ______.6. 选择题：What do we call the outermost layer of the Earth?A. MantleB. CrustC. CoreD. LithosphereThe _______ has a unique pattern on its leaves.8. War in the United States was fought over ________ (奴隶制). 填空题：The Code9. 听力题：A ______ can be very protective of its territory.10. 选择题：What do we call a baby goat?A. KidB. CalfC. CubD. Lamb答案:A11. 填空题：The __________ (历史的传说) captivates audiences.12. 听力题：The chemical formula for ethanol is _______.13. 选择题：What do we call a person who studies stars?A. BiologistB. AstronomerC. GeologistD. Chemist14. 选择题：What is the capital of Portugal?A. LisbonB. MadridC. BarcelonaD. Porto答案: A15. 听力题：Chemical symbols are used to represent ______.16. 填空题：The ______ (海豚) is known for its intelligence.17. 听力题：The book is _____ (interesting/boring).My sister loves __________ (唱歌).19. 填空题：The rabbit loves to dig _______ (洞) in the soil.20. 听力题：The _____ (相框) holds a picture.21. 听力题：A _______ can be used to measure the intensity of sound in a room.22. 听力题：A solar system can have many _____, but usually has one star.23. 填空题：The zebra is known for its _______ (条纹).24. 听力题：She is a great ________.25. 填空题：He is a nice _____ (邻居).26. 选择题：What is the opposite of "day"?A. MorningB. AfternoonC. NightD. Evening答案: C27. 听力题：He _____ (is/are) my best friend.28. 听力题：The teacher is _____ (kind/strict) to us.29. 填空题：I love to ______ (观察) the stars at night.30. 听力题：A physical property of water is that it is ______.The _______ can provide a safe place for small animals.32. 听力题：The process of ionization produces charged ______.33. 填空题：The __________ (历史的引发) stimulates discussion.34. 选择题：What is the name of the game played with a round ball and goals?A. TennisB. BasketballC. SoccerD. Baseball35. 选择题：What do we call the act of gathering information?A. ResearchingB. InvestigatingC. LearningD. Studying36. 听力题：She is drawing a _____ (cat/dog) in her notebook.37. 听录音，选出你所听到的图片。
2024年02版小学六年级上册T卷英语第四单元测验试卷
2024年02版小学六年级上册英语第四单元测验试卷考试时间：80分钟（总分:120）A卷考试人：_________题号一二三四五总分得分一、综合题(共计100题)1、What is the term for a young kangaroo?A. CubB. CalfC. JoeyD. Kit答案:C. Joey2、听力题：The __________ is a region known for its dense forests.3、What is the capital of Thailand?A. BangkokB. PhuketC. Chiang MaiD. Pattaya4、听力题：The main gas emitted during combustion is __________.5、What do we call the layer of gases surrounding the Earth?A. HydrosphereB. AtmosphereC. LithosphereD. Biosphere答案:B6、听力题：She can ________ fast.7、填空题：A _____ is a steep cliff or slope.8、听力题：A __________ is a place where fresh water meets salt water.9、What is the term for a group of lions?A. PackB. PrideC. FlockD. Gaggle答案: B. Pride10、听力题：The process of distillation separates liquids based on differences in _______ points.11、填空题：A skunk sprays a strong ______ (气味) when threatened.12、What is the name of the fairy tale character who lost her glass slipper?A. Snow WhiteB. CinderellaC. Sleeping BeautyD. Little Red Riding Hood答案:B13、Which animal lives in a den?A. LionB. FishC. BirdD. Frog答案: A14、What is the capital city of Mexico?A. CancunB. GuadalajaraC. Mexico CityD. Tijuana答案：C15、填空题：My brother is a great __________ (运动员) in basketball.16、填空题：Cats can climb ________ very well.17、填空题：I enjoy _______ (参加) cultural festivals.18、What is 8 + 4?A. 10B. 11C. 12D. 1319、听力题：I can see a ___. (cloud) in the sky.20、听力题：A chemical reaction can be reversible or ______.21、填空题：My _______ (猫) enjoys chasing mice.22、填空题：The ancient Greeks held ________ every four years in honor of Zeus.23、What do we call the food we eat during lunch?A. BreakfastB. DinnerC. SnackD. Lunch24、填空题：The _____ (猫) is a curious and independent animal.25、What is the color of a typical carrot?A. OrangeB. GreenC. YellowD. Red答案:A26、听力题：Solubility can be affected by temperature and _____ of the solvent.27、听力题：The Ring of Fire is known for its ______ activity.28、填空题：I like to pretend my ________ (玩具名) can talk and tell me stories.29、What do we call the study of fossils?A. PaleontologyB. ArchaeologyD. Anthropology答案: A30、听力题：An electromagnet is created by passing electricity through a ______ (coil).31、听力题：Acids can turn blue litmus paper _____.32、听力题：My sister is a good ________.33、填空题：My favorite type of music is _______ (流行音乐).34、听力题：The first successful flight of a hot air balloon was in _______.35、听力题：We will have ______ for dinner tonight. (chicken)36、How many zeros are in one thousand?A. OneB. TwoC. ThreeD. Four37、What do we call the practice of planting trees to improve the environment?A. ReforestationB. DeforestationC. AfforestationD. Urbanization答案:A38、听力题：A __________ is a famous site for outdoor festivals.39、What is the capital of Egypt?A. CairoB. AlexandriaC. LuxorD. Giza40、What do you call a group of musicians?A. BandC. OrchestraD. All of the above答案:D41、听力题：The chemical symbol for oxygen is _______.42、What do you call a young rabbit?A. KidB. BunnyC. PupD. Kit答案:D43、Which festival is known as the Festival of Lights?A. ChristmasB. DiwaliC. HalloweenD. Easter答案:B44、填空题：The gazelle can jump very _______ (高).45、听力题：The chemical formula for sodium sulfate is __________.46、What tool do you use to write?A. BrushB. HammerC. PencilD. Scissors答案: C. Pencil47、听力题：Some _______ like to grow in water.48、选择题：Which of these is a primary color?A. GreenB. PurpleC. RedD. OrangeThe _____ (兔子) has long ears and a short tail.50、What do we call the study of ancient cultures?A. AnthropologyB. SociologyC. ArchaeologyD. History51、听力题：My sister is ______ to a concert tonight. (going)52、填空题：The __________ (历史的记忆) shapes identity.53、填空题：The _____ (叶子) change color in autumn.54、Which fruit is yellow and sour?A. AppleB. LemonC. OrangeD. Cherry55、填空题：My family enjoys having ________ (晚餐) together.56、What is the capital of Spain?A. BarcelonaB. MadridC. SevilleD. Valencia答案:B57、听力题：Combustion is a chemical reaction that produces ________ and water.58、Which of these is a winter sport?A. SurfingB. SkiingC. RunningD. Cycling答案:BThe shark is a _______ (强大的) predator in the sea.60、填空题：The _____ (cantaloupe) is a sweet melon.61、填空题：The __________ (历史的交织) illustrates interconnectedness.62、填空题：The sky is ________ (晴朗) today, let's go outside!63、听力题：Chalk is made of calcium ______.64、听力题：My favorite game is ______ (hide-and-seek).65、填空题：A ________ (植物研究中心) promotes innovation.66、选择题：What is the name of the famous Italian dish made with pasta?A. PizzaB. RisottoC. LasagnaD. Fettuccine67、听力题：The water is ________ in the lake.68、What do we call a person who sings?A. DancerB. ActorC. SingerD. Painter69、听力题：The chemical formula for sodium phosphate is ______.70、What is the main ingredient in a fruit salad?A. VegetablesB. FruitC. GrainD. Meat答案:B71、Which of these is a type of pasta?A. SushiB. LasagnaC. TacosD. Curry答案:B72、听力题：The ____ is a small creature that loves to eat carrots.73、填空题：The ancient Greeks used _______ in their architecture. (柱子)74、听力填空题：I like to collect __________ because they are __________.75、What is the opposite of "hot"?A. ColdB. WarmC. CoolD. Spicy76、听力题：If you drop a feather and a rock, the rock will fall _______.77、选择题：What is the process by which plants get energy from sunlight called?A. RespirationB. PhotosynthesisC. DigestionD. Germination78、听力题：I have a ________ (new) bicycle.79、填空题：I enjoy listening to ________ (音乐) while studying.80、填空题：My ________ (玩具名称) is a special gift from my parents.81、听力题：The __________ of a substance is determined by its temperature and pressure.82、听力题：In a chemical equation, products are on the ______ side.83、What do you call a place with lots of trees?A. DesertB. OceanC. ForestD. City84、听力题：My ______ enjoys learning about different cultures.85、填空题：The bumblebee collects _______ (花蜜) from flowers.86、填空题：Planting can foster a sense of ______ (社区精神).87、填空题：My dad is very __________ (可靠的).88、What do you call a person who collects stamps?A. PhilatelistB. NumismatistC. CollectorD. Dealer答案: A89、What is the name of the force that pulls objects toward the Earth?A. MagnetismB. FrictionC. GravityD. Kinetic答案:C. Gravity90、填空题：A ________ (植物观察记录) is essential for research.91、选择题：What do you call the act of taking care of pets?A. VeterinaryB. Animal CareC. Pet SittingD. Animal Husbandry92、What do we call a shape with four equal sides?A. RectangleB. SquareC. TriangleD. Circle答案:B93、填空题：The ant colony is very _________. (组织)94、填空题：My cousin is very __________ (聪明).95、What is the main ingredient in salad?A. RiceB. LettuceC. PastaD. Bread答案:B96、What is the name of the famous scientist who discovered penicillin?A. Marie CurieB. Alexander FlemingC. Louis PasteurD. Edward Jenner答案: B97、What do we call the chemical element with the symbol H?A. HydrogenB. HeliumC. LithiumD. Oxygen答案: A. Hydrogen98、填空题：The park is _______ (适合家庭)。
九江“PEP”2024年小学三年级Y卷英语第三单元期末试卷[含答案]
![九江“PEP”2024年小学三年级Y卷英语第三单元期末试卷[含答案]](https://img.taocdn.com/s3/m/0793e1c9d0f34693daef5ef7ba0d4a7302766cb1.png)
九江“PEP”2024年小学三年级英语第三单元期末试卷[含答案]考试时间：90分钟（总分:140）A卷考试人：_________题号一二三四五总分得分一、综合题(共计100题)1、填空题：I love to ______ (跳舞) at parties.2、Which of these is a fruit?A. CarrotB. PotatoC. AppleD. Broccoli答案: C3、填空题：I love the colors of ______ (秋天) when the leaves change. It’s a beautiful sight to see.4、填空题：The flowers in the garden are _______ and vibrant.5、听力题：The chemical formula for calcium sulfate is _______.6、听力题：My ______ is an expert in technology.7、选择题：What is the name of the famous river in Russia?A. VolgaB. DanubeC. AmazonD. Nile8、听力题：The weather is _____ (warm/cold) in spring.Metalloids have properties of both metals and ______.10、填空题：The _______ (小蝙蝠) uses echolocation to find food.11、听力题：The ______ is known for her community service.12、填空题：The ________ was a significant leader in the fight against poverty.13、听力题：The chemical symbol for potassium is _____.14、填空题：My teacher is very __________ (聪慧的).15、填空题：We have a ______ (愉快的) gathering for school events.16、听力题：The freezing point of water is _______ degrees Fahrenheit.17、听力题：The _____ (tree) has many leaves.18、选择题：What is the main ingredient in salad?A. PastaB. LettuceC. RiceD. Bread19、Which animal is black and white and eats bamboo?A. PandaB. ZebraC. SkunkD. Penguin答案:A20、n the summer are very ______ (美丽). 填空题：Taking cMy family has a pet _______ (动物). Its name is _______ (名字). It loves to _______ (动词) around the house.22、听力题：The flowers smell ______. (wonderful)23、填空题：This ________ (玩具) is my favorite companion during adventures.24、How many months are in a year?A. TenB. ElevenC. TwelveD. Thirteen25、What is the name of the famous waterfall in Venezuela?A. Iguazu FallsB. Angel FallsC. Victoria FallsD. Niagara Falls答案: B26、听力题：The candy is very _______ (sticky).27、听力题：An orbit is the path a planet takes around a ______.28、听力题：A __________ is a type of chemical bond formed by sharing electrons.29、填空题：At school, we learn many subjects like ________ (数学), ________ (英语), and________ (科学). I especially like ________ (英语) class.30、填空题：A ______ (公鸡) crows in the morning.31、填空题：The _____ (牛) provides milk.32、What do you call the time when the sun goes down?A. MorningB. NoonC. EveningD. Night33、听力题：The _____ (鱼缸) is clean.34、填空题：My cat loves to scratch its ______ (抓板).35、填空题：I often help my __________ with cooking. (妈妈)36、What do we call the process of converting a liquid into a solid?A. FreezingB. MeltingC. EvaporationD. Condensation37、听力题：The movie was very _______ (interesting).38、What do we call the process of removing excess water from soil?A. DrainageB. IrrigationC. FloodingD. Drought答案:A39、What do we call the study of the universe?A. AstronomyB. AstrologyC. CosmologyD. Astrophysics答案: A40、填空题：The __________ is the capital city of Canada. (渥太华)41、What is the main ingredient in potato chips?A. CornB. WheatC. PotatoesD. Rice答案: CA baby cat is called a ______.43、填空题：I call my brother's friend __________. (他朋友的名字)44、填空题：My mom enjoys __________ (做饭) for special occasions.45、What do we call the study of animals?a. Anthropologyb. Biologyc. Zoologyd. Ecology答案:c46、填空题：A ________ (草本植物) has soft stems.47、选择题：What do we call the act of telling someone what to do?A. AdvisingB. DirectingC. InstructingD. Commanding48、听力题：Nitrogen makes up most of the ______.49、听力题：My brother is a ______. He enjoys drawing.50、填空题：In summer, the days are ______ (更长).51、听力题：A colloid is a mixture where tiny particles are _____ throughout a liquid.52、填空题：I enjoy exploring new ______ (地方), especially historical sites.53、听力题：A thermometer measures how hot or cold something is in ______.54、听力题：The soup is ___. (warm)The kitten loves to play with a ______ (小球). It has so much ______ (乐趣).56、What is the name of the famous novel written by George Orwell?A. Brave New WorldB. 1984C. Animal FarmD. Fahrenheit 451答案: B. 198457、What do you call a person who teaches others?A. EducatorB. InstructorC. MentorD. All of the above答案:D58、What is a common way to show gratitude?A. FrowningB. SmilingC. IgnoringD. Complaining答案: B. Smiling59、填空题：The ancient Romans are known for their ________ and contributions to law.60、Which fruit is yellow?哪种水果是黄色的？A. AppleB. BananaC. CherryD. Grape答案: B61、What do you call the sweet food made from milk and sugar that is frozen?A. SorbetB. Ice CreamC. GelatoD. Sherbet答案: B62、填空题：My ________ (玩具名称) helps me learn new words.63、What is the name of the famous race in France?A. Tour de FranceB. Boston MarathonC. New York City MarathonD. London Marathon答案: A64、What is the capital of Zimbabwe?A. HarareB. LusakaC. MaputoD. Gaborone答案: A65、填空题：I can _______ very fast.66、填空题：We visit the ______ (动物园) to learn about different species.67、填空题：The crab scuttles across the _______ (沙子).68、填空题：A _____ is an area of land defined by specific boundaries.69、填空题：The ________ was a significant battle in World War II.70、填空题：A ________ (种子) can stay dormant for years.71、What is the largest organ in the body?A. BrainB. LiverC. SkinD. Heart72、听力题：I want to learn how to ______ (ride) a unicycle.73、听力题：A geologist studies the Earth’s ______.74、填空题：My mom loves __________ (拼图).My _____ (小狗) loves to fetch sticks.76、听力题：The ________ (collaboration) leads to success.77、填空题：In the jungle, plants grow very __________ (茂密).78、What is the name of the bright star that marks the North Star?A. SiriusB. PolarisC. VegaD. Betelgeuse79、Which instrument has keys and is played by pressing them?A. GuitarB. DrumsC. PianoD. Flute答案:C80、What do plants need to grow?A. WaterB. CandyC. ToysD. Music答案:A. Water81、What is the name of the famous mountain range in Europe?A. AndesB. HimalayasC. AlpsD. Rockies答案：C82、填空题：My favorite _____ is a bright blue kite.83、填空题：My favorite fruit is ________ (橙子).84、填空题：I enjoy _______ (与朋友聚会).Many _______ have medicinal uses.86、填空题：A dolphin is a playful _______ that loves to swim and splash around.87、What do you call a sweet, baked dessert with layers?A. PieB. TartC. CakeD. Brownie答案:C88、What is the name of the famous American holiday celebrated on the first Monday of September?A. Labor DayB. Memorial DayC. Independence DayD. Thanksgiving答案:A89、填空题：The ________ is a joyful little friend to have.90、听力题：A ______ is a type of fish that can change color.91、填空题：A ________ (种植者) takes care of the plants.92、听力题：A mixture that appears different throughout is called a _______ mixture.93、填空题：We have ______ (很多) fun at the beach.94、听力填空题：I love traveling to experience different lifestyles and __________.95、填空题：I like to race my toy ________ (玩具名称) with friends.96、填空题：The teacher, ______ (老师), motivates us to learn.97、What do you call the frozen form of water?A. LiquidB. VaporC. IceD. Steam98、Which of these is a type of flower?A. TulipB. OakC. PineD. Maple答案:A99、What is the capital of Belize?A. BelmopanB. Belize CityC. San IgnacioD. Orange Walk答案: A100、听力题：I can ______ my homework. (finish)。
包头24年小学3年级第十四次英语第二单元测验卷(有答案)
包头24年小学3年级英语第二单元测验卷(有答案)考试时间：100分钟（总分:110）B卷考试人：_________题号一二三四五总分得分一、综合题(共计100题共100分)1. 听力题：The _____ (图画) is on the wall.2. 填空题：__________ (浓缩) increases the concentration of a solution.3. 听力题：The bird is _____ (singing/sleeping) in the tree.4. 选择题：What do you call a group of stars?A. GalaxyB. UniverseC. ConstellationD. Nebula5. 听力题：The process of splitting water molecules into hydrogen and oxygen is called ______.6. 选择题：Who is famous for saying "I have a dream"?A. Albert EinsteinB. Martin Luther King Jr.C. Abraham LincolnD. Nelson Mandela答案: B7. 听力题：She is ________ to music.The chemical formula for potassium nitrate is ______.9. 填空题：She is a historian, ______ (她是一名历史学家), studying the past.10. 选择题：What is the name of the first human to travel into space?A. Neil ArmstrongB. Yuri GagarinC. John GlennD. Buzz Aldrin11. 听力题：A solution with more solute than it can hold is called ______.12. 听力题：The coffee is too ___. (strong)13. 选择题：What do we call the hot season of the year?A. WinterB. SpringC. SummerD. Autumn14. 填空题：A parrot can mimic human ______ (语言).15. 听力题：I found a ___ in my pocket. (coin)16. 选择题：What do you call the story of someone's life?A. BiographyB. NovelC. PoemD. Play17. 听力题：The study of matter and its changes is called _______.18. 填空题：A rabbit can have several ______ (幼崽) at once.The _____ (纸飞机) can fly far.20. 听力题：I can _____ my bicycle very fast. (ride)21. 听力题：The _____ (leaf) is green.22. 填空题：I like to play with my ________ (拼图) every rainy day.23. 选择题：What do you call a person who studies animals?A. ZoologistB. BiologistC. EcologistD. Anthropologist答案:A24. 听力题：The chemical symbol for tantalum is _______.25. 选择题：What do we use to protect our eyes from the sun?A. GlassesB. HatC. SunscreenD. Scarf26. 填空题：A ____(transportation network) connects various modes of transport.27. 选择题：What shape has three sides?哪种形状有三条边？A. SquareB. TriangleC. CircleD. Rectangle答案: B28. 听力题：The __________ is a famous area known for its cultural heritage.29. 填空题：We visit the ______ (博物馆) for field trips.I enjoy learning new ______ (单词) in English. It helps me communicate better with others.31. 填空题：A ________ (小鸟) makes a nest in the tree every spring.32. 选择题：What do you call the process of converting sunlight into energy?A. PhotosynthesisB. RespirationC. FermentationD. Digestion答案:A33. 听力题：His favorite food is ________.34. 听力题：A chemical reaction that produces light and heat is called a ______ reaction.35. 听力题：The capital of Finland is __________.36. 填空题：My mom loves to grow ________.37. 听力题：We are learning about ________.38. 听力题：The _____ (flower/tree) is blooming.39. 填空题：A _______ (小骆驼) can go long without water.40. 填空题：The ancient Greeks held _____ to honor their gods.41. 听力题：A _______ is a mixture that appears uniform throughout.42. 选择题：Which instrument is typically played with a bow?A. FluteB. TrumpetC. ViolinD. Guitar答案: C. Violin43. 填空题：My favorite type of ________ (小吃) is chips and salsa.44. 听力题：A ______ can help restore habitats.45. 听力题：The __________ is known for its tropical climate.46. n Rainforest is often called the ________ (地球之肺). 填空题：The Amaz47. 听力题：The _______ plays a vital role in the environment.48. 听力题：The chemical symbol for lanthanum is ______.49. 填空题：I have a special ________ that keeps secrets.50. 听力题：We see many birds in the ___. (sky)51. 选择题：What is the fastest land animal?A. CheetahB. HorseC. LionD. Kangaroo52. 填空题：I saw a ________ swimming in the ocean.53. 听力题：A _______ is a reaction that occurs in the presence of oxygen.54. 听力题：I want to ___ a superhero. (become)55. 填空题：I have a toy _______ that can make me smile.What do you call a sweet, cold treat made from ice?A. SlushB. Snow coneC. Ice creamD. All of the above答案:D57. 填空题：A rabbit can have many ______ (小兔子) in a year.58. 填空题：A __________ (植物的生命周期) includes several stages.59. 听力题：The element with the atomic number is ______.60. 选择题：What do we wear on our head for protection?A. ShoesB. HatC. ScarfD. Gloves61. 选择题：What do you call a baby walrus?A. CalfB. PupC. KitD. Cub答案: A62. 选择题：What do you call the person who studies insects?A. EntomologistB. BiologistC. ZoologistD. Botanist63. 选择题：What is the main gas that plants use for photosynthesis?A. OxygenB. Carbon dioxideC. NitrogenD. Helium答案:B. Carbon dioxideWhat is the term for a baby cow?a. Calfb. Kidc. Foald. Lamb答案:a65. 填空题：The _____ (狐狸) has a keen sense of smell.66. 听力题：I love eating ___. (fruit)67. 填空题：Plants need proper ______ (间距) to grow well.68. 听力题：The ice cream is _____ (cold/hot) and delicious.69. 填空题：My sister loves to sing ____.70. 听力题：A neutral solution has a pH of _____.71. 填空题：A tortoise carries its ______ (壳) everywhere.72. ts can grow from __________ (插枝). 填空题：Some pla73. 选择题：What do you call a person who writes stories?A. ArtistB. AuthorC. TeacherD. Chef答案: B74. 填空题：The __________ (生态系统) includes many types of flora and fauna.75. 填空题：I love to _____ (harvest) fresh herbs from my garden.The ancient Egyptians built ________ to honor their pharaohs.77. 听力题：The __________ is the process by which plants convert sunlight into energy.78. 听力题：Plants release oxygen during the process of ________.79. 听力题：The __________ is a large expanse of open water.80. 填空题：The _____ (小狗) loves to play fetch.81. 选择题：What is the capital of China?A. BeijingB. ShanghaiC. Hong KongD. Taipei答案:A82. 填空题：The eagle is a _______ (伟大的) hunter.83. 填空题：My friend is a _____ (艺术家) who collaborates with others.84. 填空题：My brother is very __________ (合作的) during group projects.85. 听力题：The boy is a good ________.86. 听力题：A __________ is known for its strong sense of smell.87. 听力题：The __________ is an area where the land is very wet.88. 听力题：A ____ is a curious animal that enjoys jumping over obstacles.89. 选择题：What do we call the invisible force that pulls objects towards each other?A. MagnetismB. GravityC. FrictionD. Pressure答案:B90. 听力题：A ______ is a large area of low-lying land.91. 填空题：We should plant more ______ (树木).92. 填空题：The owl hoots at _________. (夜晚)93. 选择题：What is the main purpose of a seed?A. To grow into a plantB. To produce fruitC. To attract animalsD. To store water答案: A94. 选择题：What do you call the largest planet in our solar system?A. EarthB. MarsC. JupiterD. Neptune答案:C95. 选择题：Which of these is an insect?A. SpiderB. AntC. WormD. Crab答案:B96. 听力题：The Orion Nebula is one of the brightest nebulae visible from _______.97. 填空题：My puppy loves to bark at ______ (邮递员).98. 填空题：I enjoy __________ with my friends. (交谈)99. 听力题：I see a _____ butterfly in the garden. (beautiful)100. 选择题：What is the opposite of "up"?A. DownB. LeftC. RightD. Across。