Homework06-Solution

第6周homework 1答案Have you ever felt lumps under the skin on the sides of your neck when you were sick? Those might be lymph nodes. 1.They can get swollen and painful but their job is to fight infection. Lymph nodes are part of the body's defenses known as the lymphatic system.2.This complex system throughout the body makes and transports a protective fluid called lymph.3.Lymph is made of white blood cells, proteins and fats.In a patient with breast cancer, the cancer can spread to the large number of lymph nodes under the arm. 4. Doctors have traditionally removed many of these lymph nodes in the hope of removing all the cancer.But the latest research finds nothing to gain by removing so many lymph nodes. Doctors have two choices when breast cancer starts to spread. They can do what is called a sentinel node biopsy. They remove the main growth and one or 2 lymph nodes nearest to it.5.Or they can take more aggressive action and remove a lot of lymph notes.6. But that can lead to shoulder pain and permanent swelling o f the arm.第6周homework 2答案Now the Earth Policy Institute in Washington has issued a bleak warning of the risk of environmental and economic 1. chaos. Its founder Lester Brown says a push towards sustainability could help. In fact, he says, it's essential. In this week's Global Business, Peter Day hears why.Lester Brown started life as a farmer in New Jersey, the Garden State in the USA. He got some hefty degrees, worked at home and abroad for the US Department of Agriculture, and then in 1974, he founded the World Watch Institute. It became well-known for its 2. annual state of the world reports on the global environment. Years ago when I had one of our 3. periodic chats at the World Watch Institute in Washington D.C., I remember a room decked with satellite maps of the world's watershed areas. Water is still an 4.abiding theme for Lester Brown in his newer role as founder and head of the Earth Policy Institute. It's another Washington D.C. think tank designed to provide a road map for building a 5.sustainable economy.But even after so many years on the environmental beach, there's a new urgency in what Lester Brown is saying in the book World on the Edge. As an agriculturist by training, he 6.focuses on food and the new threat of food scarcity caused by natural disasters,such as the Russian drought last summer, and 7.consequential flooding elsewhere, and increasing demand for many developing countries as well as the rich world.Lester Brown thinks 8.the world has to mobilize to embrace sustainability in the waythat much of the western world mobilized to fight the Second World War.第6周homework 3答案National standards for US schools gain supportAmericans have never had national education standards. Goals for what public schools should teach are set by state and local school boards. Their members are often elected. But some Americans say the lack of national standards is wrong in a competitive global economy. Former president Bill Clinton said it was as if somehow school boards "could legislate differences in algebra or math or reading."President George W. Bush and Congress expanded federal intervention. His education law, still in effect, required states to show yearly progress in student learning as measured by the states' own tests.1.Now, the Obama administration supports what are known as the Common Core State Standards. These were developed in a year-long process led by state governors and chief state school officers. Texas and Alaska were the only states not to take part.2.The standards are in two subject areas, English-language arts and mathematics. They establish goals for each year from kindergarten through grade twelve. The aim is for students to finish high school fully prepared for college and careers.The developers considered standards in other countries, along with almost one hundred thousand public comments.3. One way the Education Department is trying to persuade states is with money. States are competing to share in almost three and a half billion dollars as part of a school reform competition. They will earn extra points in the race to the top if they approve the standards by August second.States are trying to recover from the recession. There are concerns that some could accept the standards and then lack the money to follow them.The final standards were released June second. A new report say about half the states have approved them already.4. The Thomas B. Fordham Institute is an education group in Washington. It says the standards are clearer and stronger than those used in three-fourths of the states.But the comparison also found that existing English standards are "clearly stronger" in California, Indiana and the District of Columbia.States that approve the new standards have a right to add up to fifteen percent of their own. In California, the State Board of Education plans to vote on August second to accept or reject a new set of standards. These are based largely on the common core, but also existing California standards.第3, 4周homework 1译文你生病时有没有感觉到脖子两侧的肿块？那或许就是淋巴结。

小学下册英语第6单元期中试卷英语试题一、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.What is 10 3?A. 6B. 7C. 8D. 9B 72.I look forward to the future with excitement. There are so many possibilities ahead. I hope to __________ and make a meaningful contribution to society.3.I make _____ (晚餐) for my family.4.What do we call a large-scale destruction caused by natural forces?A. DisasterB. CatastropheC. CrisisD. EmergencyB5.The flowers are ________ (盛开的).6. A puppy loves to ______ (跳跃) around.7.The parakeet has a playful _______ (个性).8.He is a _____ (博士) who teaches at a university.9.I like to ________ with my friends.10.What is the capital city of Nigeria?A. AbujaB. LagosC. KanoD. Port HarcourtA11.The frog jumps into the ______ (lake).12.How many legs does a spider have?A. SixB. EightC. FourD. TenB13.The first person to reach the North Pole was ______ (皮尔·阿蒙森).14.The bird is building a ______ (nest) in the tree.15.What is the name of the famous ancient monument in England?A. StonehengeB. Hadrian's WallC. AveburyD. SilburyHillA Stonehenge16.The invention of the printing press changed the way information was ________.17.What do we call a baby seal?A. PupB. CalfC. KidD. ChickA Pup18. A saturated solution contains the maximum amount of ______ dissolved.19.What do we call the place where books are kept?A. LibraryB. StoreC. SchoolD. Office20.The Earth's crust is essential for providing ______ resources.21.We have _____ (to/must) finish our work.22.What is the freezing point of water?A. 0 degrees CelsiusB. 100 degrees CelsiusC. 50 degrees CelsiusD. 25 degrees Celsius23.The _____ (花朵) attracts bees and butterflies.24.The signing of the Magna Carta took place in ________ (英格兰).25.The _______ (Space Race) was a competition between the US and USSR for space exploration.26.The __________ helps to regulate the earth's temperature.27.The element with the atomic number is ______.28.The bird has bright _______ (鸟有鲜艳的_______).29.The teacher is ___ the students. (helping)30. A _____ is an area characterized by specific vegetation.31.I have a _____ (毛绒玩具) that is soft.32. A __________ is a geological feature that can impact human settlements.33. A ____ is a tiny, buzzing creature that helps pollinate flowers.34.My __________ (玩具名) is my best __________ (名词).35. A ________ (植物景观设计师) creates stunning environments.36. A rabbit can hop very ______ (快).37.Trees are important for ______ (空气) quality.38.Covalent bonds are formed by the sharing of ______.39.My favorite sport is ________.40.The ______ (生命周期) of a plant is fascinating to study.41.An exothermic reaction releases _____ into the surroundings.42.What is the opposite of hot?A. WarmB. CoolC. ColdD. MildC43.The garden is alive with _______ and buzzing bees.44.The country known for its vibrant culture is ________ (巴西).45.The ________ (event) inspires change.46.The _____ (小猫) is chasing a butterfly in the garden.47.What do you call the round fruit that is red or green?A. OrangeB. AppleC. BananaD. GrapeB48. A _____ (鳄鱼) waits patiently for its meal.49.Which ocean is the largest?A. AtlanticB. IndianC. ArcticD. PacificD Pacific50.My friend enjoys ____ (playing) video games with me.51.The ancient Romans believed in many _______. (神灵)52.What is the term for the time between sunset and night?A. DawnB. DuskC. NoonD. Midnight答案:B53.The ________ grows in clusters.54.The _____ (pollen) is carried by the wind.55.What is the capital of Indonesia?A. ManilaB. JakartaC. HanoiD. Bangkok56.I like to ______ (参与) in cooking competitions.57.What is the main ingredient in chocolate?A. CocoaB. SugarC. MilkD. VanillaA58.Which part of the plant absorbs water and nutrients from the soil?A. LeafB. StemC. RootD. FlowerC59.My mom loves to garden and grow ____ (flowers).60.The teacher gives us _____ for homework. (assignments)61.The __________ (人类需求) must be met responsibly.62.What is the name of the famous author of "Harry Potter"?A. J.R.R. TolkienB. J.K. RowlingC. C.S. LewisD. Suzanne CollinsB63.I enjoy ________ (园艺) in my free time.64.The dog is _______ (running) after the ball.65.Goldfish swim in ______ water.66.The capital of Papua New Guinea is ________ (莫尔兹比港).67.My ________ (玩具名称) is colorful and bright.68.The continent where kangaroos live is ________ (澳大利亚).69.My friend loves __________ (参与社区服务).70. A hamster's cheek pouches allow it to store ________________ (食物).71.The ______ helps us understand mathematics.72.What is the longest river in the world?A. AmazonB. NileC. MississippiD. Yangtze73.The process of filtering is used to separate solids from _______.74.Which season comes after winter?A. SpringB. SummerC. AutumnD. Fall75.What is the main ingredient in lasagna?A. RiceB. PastaC. BreadD. PotatoesB76.Octopuses have _________ (触手).77.What is the main ingredient in potato chips?A. CornB. WheatC. PotatoesD. RiceC78.My brother likes to play ____ (basketball) with his friends.79.What do we call the process of changing from a caterpillar to a butterfly?A. TransformationB. EvolutionC. GrowthD. MetamorphosisD80.My friend is a ______. He loves to travel.81.The garden has many ______ (plants).82.What do you call the person who teaches in a school?A. PrincipalB. TeacherC. StudentD. ParentB83.The ________ (天气) can change quickly in the mountains.84.What do we call the process of a caterpillar turning into a butterfly?A. MetamorphosisB. EvolutionC. TransformationD. DevelopmentA85.I see a __ in the park. (dog)86.The dog is _____ with its toy. (playing)87.The __________ (潮汐) affects the ocean's levels.88.The ______ teaches us about literature.89.My mom loves to cook healthy ____.90.What do we call the study of plants?A. BotanyB. ZoologyC. EcologyD. AnthropologyA91.The ________ (house) is very big.92.The __________ (历史的文化表现) impact societal norms.93.The flowers smell ________.94.The ancient Egyptians preserved ________ to pass down history.95.I want to _____ (research) plants for my project.96.What do we call a person who studies the weather?A. ClimatologistB. MeteorologistC. EnvironmentalistD. Geologist97.How many sides does a pentagon have?A. 4B. 5C. 6D. 7B98.What do you call the leader of a country?A. PresidentB. TeacherC. DoctorD. Mayor99.We should _______ (保持)我们的城市干净.100.What do you call the light produced by the sun?A. Natural lightB. Artificial lightC. Reflective lightD. Incandescent lightA Natural light。

小学下册英语第6单元暑期作业(含答案)考试时间：80分钟（总分:120）A卷一、综合题(共计100题共100分)1. 听力题：The ______ is known for its speed.2. 填空题：The _____ (violet) grows low to the ground.3. 填空题：A turtle retreats into its _______ when it feels scared.4. 填空题：I enjoy watching birds build their ______ (巢) in the spring.5. 填空题：My favorite dish is ______ (意大利菜).6. 选择题：What is the primary color of a strawberry?A. BlueB. RedC. YellowD. Green答案: B7. 选择题：What do we call a story that is not true?A. Non-fictionB. FantasyC. FictionD. Biography8. 选择题：Where do fish live?A. TreesB. WaterC. LandD. Sky9. 听力题：The Mediterranean Sea is located between Europe and _______.10. Listen and number.听录音，标号。

11. 填空题：The ______ (水文条件) affect plant distribution.12. 填空题：A ________ (野花) can be found in nature.13. 选择题：What do we call the place where we go to buy groceries?A. MallB. Grocery storeC. ParkD. Library14. 选择题：What do you call the clothes you wear on your feet?A. SocksB. ShoesC. BootsD. All of the above15. 听力题：Acids release hydrogen ions (H⁺) in a _____ (solution).16. 填空题：Horses are often used for _________ (骑).17. 选择题：Where do fish live?A. TreesB. MountainsC. WaterD. Deserts答案:C18. 填空题：The ancient Egyptians developed intricate ________ (艺术作品).19. 选择题：What do you call a story told by a narrator?A. PlayB. DramaC. NarrativeD. Poem20. 填空题：I have a toy _____ that can transform.21. 填空题：The __________ (大航海时代) changed global trade routes.22. 听力题：A _______ is a type of reaction that occurs spontaneously.23. 填空题：My uncle works as a __________. (工程师)24. 选择题：What is the freezing point of water?A. 0°CB. 32°CC. 100°CD. -32°C25. 选择题：Which animal is known for its ability to swim?A. OstrichB. LionC. FishD. Elephant26. 听力题：The chemical symbol for yttrium is ______.27. 填空题：古代的________ (rituals) 在宗教活动中非常重要。

Homework1：（(Important deadline: submit your homework on next Saturday, Oct. 17, 2009）Questions ( from Data Networks) list:3.6 A person enters a bank and finds all of the four clerks busy serving customers. There are no other customers in the bank, so the person will start service as soon as one of the customers in service leaves. Customers have independent, identical, exponential distribution of service time. (a) What is the probability that the person will be the last to leave the bank assuming that no other customers arrive?(b) If the average service time is 1 minute, what is the average time the person will spend in the bank?(c) Will the answer in part (a) change if there are some additional customers waiting in a common queue and customers begin service in the order of their arrival?Solution：(a) 当该人开始接受服务时，其他3人的服务尚未结束，所有人剩下的服务时间仍为相同的指数分布。

2024年10版小学4年级下册英语第6单元暑期作业(含答案)考试时间：100分钟（总分:110）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：The _____ (猫) is a curious and independent animal.2. 填空题：I have a best friend named ________ (小明). We like to play video games and go to the ________ (图书馆) together.3. 选择题：What is the opposite of 'happy'?A. SadB. JoyfulC. ExcitedD. Angry4. 听力题：There are five ___ in the basket. (apples, cars, chairs)5. 填空题：The _____ (小道) in the garden is lined with flowers.6. 选择题：What do we call a sweet food made from cream and sugar?A. Whipped CreamB. MousseC. Chantilly CreamD. All of the above7. 填空题：My ___ (乌龟) takes a long time to walk.8. 听力题：The ______ is the main organ for breathing.9. 听力题：We are going to the ___. (fair)10. 听力题：Astronomers can determine a star's temperature by studying its _______.11. 选择题：What do we call a place where birds are kept?A. AviaryB. AquariumC. ZooD. Sanctuary答案: A12. 填空题：My sister has a pet ______ (鹦鹉) that says "hello."13. 听力题：A _____ is a celestial body that orbits the sun.14. 填空题：I love the sound of ______ (水滴) on the roof.15. 选择题：What is the smallest continent?A. AfricaB. EuropeC. AustraliaD. Asia16. 填空题：My cousin is my best _______ because we have fun.17. 听力题：The ________ (exhibit) shows historical artifacts.18. 填空题：My friend has a pet _____ (鹌鹑).19. 选择题：What is the capital city of Sudan?A. KhartoumB. JubaC. Port SudanD. Omdurman20. 填空题：In _____ (菲律宾), there are many beautiful beaches.21. 听力题：Heliocentrism is the model that places the sun at the ______ of the solar system.22. 听力题：An indicator changes color depending on the ______ of a solution.23. 选择题：What do we call the place where we watch movies?A. TheaterB. StoreC. RestaurantD. School答案:A24. 选择题：What is the chemical symbol for gold?A. AuB. AgC. FeD. Pb答案: A25. 听力题：A _______ can be a fun craft activity for kids.26. 听力题：The ______ is a large mammal that lives in the ocean.27. 听力题：A _______ can be a climbing plant.28. 选择题：What do you call a sweet, baked good made with flour?A. CookieB. BrownieC. CakeD. All of the above答案:D29. 听力填空题：My favorite school subject is __________ because I love __________.30. 听力题：Metalloids have properties of both metals and ______.31. 填空题：The raccoon is often seen at _________. (夜晚)32. 选择题：How many zeros are in one thousand?a. Oneb. Twoc. Threed. Four答案:C33. 填空题：The capital of the Marshall Islands is ________ (马朱罗).34. 填空题：Brazil is famous for its _____ during Carnival.35. 听力题：Chemical reactions can be affected by _____, concentration, and surface area.36. 填空题：A seahorse can change its color to blend in with ______ (环境).37. 听力题：The chemical formula for phosphoric acid is _____.38. 填空题：I enjoy _______ (听音乐) while walking.39. 听力题：The element with the symbol Te is __________.40. 听力题：Noble gases are found in group ______ of the periodic table.41. 选择题：What is the capital of Tanzania?A. DodomaB. Dar es SalaamC. ArushaD. Mwanza答案:A42. 听力题：The chemical symbol for barium is ______.43. 选择题：What is the main ingredient in mayonnaise?A. MustardB. VinegarC. Egg yolkD. Oil答案:C44. 听力题：They are playing ________ (games) in the park.45. 听力题：We have a _____ (照片) on the wall.46. 填空题：I enjoy playing ______ in the backyard.47. 填空题：A ________ (植物采集) can be educational.48. 听力题：A __________ is formed through the movement of tectonic plates.49. 选择题：What is the opposite of hot?A. ColdB. WarmC. CoolD. Spicy答案:A50. 选择题：What is the primary color of a stop sign?a. Blueb. Yellowc. Redd. Green答案:C51. 选择题：What do we call a group of stars?A. GalaxyB. ClusterC. ConstellationD. Nebula答案: C52. 选择题：What is the opposite of up?A. DownB. LeftC. RightD. Forward53. 填空题：The __________ (文艺复兴) brought about changes in art and science.54. 填空题：This student, ______ (这个学生), is preparing for a competition.55. 听力题：Heat makes molecules move ______.56. 填空题：I keep a journal to write about my ________ (梦想) and aspirations for the future.57. 听力题：The chemical reaction that produces heat is called an _______ reaction.58. 选择题：What do we call a sweet dessert made from custard?A. FlanB. Crème BrûléeC. PuddingD. All of the above59. 填空题：The ________ (季节变化) can affect blooming times.60. 听力题：An object at rest tends to stay at ______ (rest) unless acted on by an outside force.61. 选择题：What do we call the process of converting a solid directly into a gas?A. MeltingB. SublimationC. CondensationD. Freezing答案: B62. 听力题：The __________ is a region known for its tea plantations.63. 填空题：我最喜欢的老师是 _______ (名字). 她的教学风格很 _______ (形容词).64. 听力题：The chemical formula for ethanol is _______.65. 选择题：What do we call the process of changing from a liquid to a gas?A. CondensationB. EvaporationC. SublimationD. Freezing答案: B66. 听力题：The chemical symbol for potassium is ______.67. 听力题：A solution is a homogeneous mixture of two or more ______.68. 填空题：The _____ (蜜蜂) helps flowers grow by pollinating them.69. 填空题：I enjoy ______ (与朋友一起玩).70. 填空题：The ______ (小鱼) swims in schools with friends.71. 听力题：His favorite food is ________.72. 选择题：Which season comes after winter?A. FallB. SummerC. SpringD. Autumn73. 听力题：During a chemical reaction, bonds between atoms are _______.74. 选择题：What is the name of the famous artist known for his abstract art?A. PicassoB. Van GoghC. MonetD. Rembrandt75. 填空题：My sister's favorite _____ is a plush unicorn.76. 填空题：The __________ (历史的动机) can be examined critically.77. 填空题：A cockroach can survive without ______ (食物) for weeks.78. 听力题：Friction can slow down a ______.79. 填空题：The __________ (历史的传承) is vital for identity.80. 填空题：A _____ (果树) produces fruit each year.81. 听力题：Constellations change position throughout the _______.82. 听力题：The first human-made object to land on the moon was _______.83. 选择题：Which fruit is known for being very juicy and sweet, and is often eaten in summer?A. AppleB. WatermelonC. BananaD. Orange答案: B84. 填空题：My sister loves to __________ (唱歌) in the shower.85. 选择题：Which animal is known for its memory?A. FishB. ElephantC. DogD. Cat答案：B86. 填空题：The frog croaks by the _________. (水边)87. 填空题：Fossil fuels release _______ when burned. (二氧化碳)88. carbon neutrality) aims for zero net emissions. 填空题：The ____89. 填空题：A snail leaves a ______ (黏糊糊的) trail behind.90. 填空题：The _____ (遥控飞机) flies high in the sky.91. 选择题：What is the term for the study of ancient civilizations?A. ArchaeologyB. AnthropologyC. HistoryD. Sociology答案:A92. 听力题：Some _______ are used for making salads.93. 听力填空题：When it rains, I like to __________. It’s cozy to stay inside and __________ with my family. We sometimes watch movies or play __________ together.94. 填空题：A stork delivers ________________ (婴儿) in stories.95. 选择题：What do we call the person who cuts hair?A. DoctorB. BarberC. ChefD. Teacher答案：B96. 听力题：A satellite orbits around a ______.97. 听力题：The snowflakes are ______ (falling) from the sky.98. 选择题：How many seconds are in a minute?a. 30b. 60c. 90d. 120答案:B99. 听力题：Plants can be _______ or wild.100. 填空题：A lion is a brave _______ that roams the savanna.。

Attention: The answers of all the problems must be attached with the particular computing process. And the answers must be printed in paper. Each group will handle in one piece. Maybe someone in each group will be asked to show the answers to the class. All answers must be written in English.65 pointsProblem1: Consider a risky portfolio. The end-of-year cash flow derived from the portfolio will be either $70,000 or $200,000 with equal probabilities of .5. The alternative risk-free investment in T-bills pays 6% per year.a. If you require a risk premium of 8%, how much will you be willing to pay for the portfolio? 5 pointsb. Suppose that the portfolio can be purchased for the amount you found in (a). Whatwill be the expected rate of return on the portfolio? 5 pointsanswers:a. The expected cash flow is: (0.5 * $70,000) + (0.5 *200,000) = $135,000With a risk premium of 8% over the risk-free rate of 6%, the required rate of return is14%. Therefore, the present value of the portfolio is:$135,000/1.14 = $118,421b. If the portfolio is purchased for $118,421, and provides an expected cash inflow of$135,000, then the expected rate of return [E(r)] is derived as follows:$118,421*[1 + E(r)] = $135,000Therefore, E(r) =14%. The portfolio price is set to equate the expected rate orreturn with the required rate of return.Problem2: Consider a portfolio that offers an expected rate of return of 12% and a standard deviation of 18%. T-bills offer a risk-free 7% rate of return. What is the maximum level ofrisk aversion for which the risky portfolio is still preferred to bills?（Hint: use this utility function U =E(r) – 0.005Aσ 2）10 pointsanswers:When we specify utility by U =E(r) – 0.005Aσ 2, the utility level for T-bills is 7%. The utility level for the risky portfolio is: U = 12 – 0.005A ⨯ 182 = 12 – 1.62AIn order for the risky portfolio to be preferred to bills, the following inequality must hold:12 – 1.62A > 7 ⇒ A < 5/1.62 = 3.09A must be less than 3.09 for the risky portfolio to be preferred to bills.Problem3: Draw the indifference curve in the expected return–standard deviation plane corresponding to a utility level of 5% for an investor with a risk aversion coefficient of 3. (Hint: Choose several possible standard deviations, ranging from 5% to 25%, and find the expected rates of return providing a utility level of 5%. Then plot the expected return–standard deviation points so derived.15 pointsanswers: Points on the curve are derived by solving for E(r) in the following equation: U = 5 = E(r) – 0.005Aσ 2= E(r) – 0.015σ 2 -----E(r) =U+ 0.015σ 2 The values of E(r), given the values of σ 2, are therefore:σσ 2E(r)0% 0 5.000%5% 25 5.375%10% 100 6.500%15% 225 8.375%20% 400 11.000%25% 625 14.375%The bold line in the following graph (labeled Q3, for Question 3) depicts the indifference curve.Use the following data in answering next 3 questions: 3*3=9 points+1pointProblem4(*):Based on the utility formula above, which investment would you select if you were risk averse with A=4?a. 1.b. 2.c. 3.d. 4.answers: C D [Utility for each portfolio = E(r) – 0.005 ⨯ 4 ⨯σ 2We choose the portfolio with the highest utility value.]Problem5(*):Based on the utility formula above, which investment would you select if you were risk neutral?a. 1.b. 2.c. 3.d. 4.answers: d [When investors are risk neutral, then A = 0; the portfolio with the highest utility is the one with the highest expected return.]Problem6(*): The variable (A) in the utility formula represents the:a. investor’s return requirement.b. investor’s aversion to risk.c. certainty equivalent rate of the portfolio.d. preference for one unit of return per four units of risk.answers: bConsider historical data showing that the average annual rate of return on the S&P 500 portfolio over the past 70 years has averaged about 8.5% more than the Treasury bill return and that the S&P 500 standard deviation has been about 20% per year. Assume these values are representative of investors’ expectations for future performance and that the current T-bill rate is 5%. Use these values to solve problems 7 to 8.Problem7: Calculate the expected return and variance of portfolios invested in T-bills and the S&P500 index with weights as follows: 10 pointsanswers:The portfolio expected return and variance are computed as follows:(1) W Bills (2)r Bills(3)W Index(4)r Indexr Portfolio(1)⨯(2)+(3)⨯(4)σPortfolio(3) ⨯ 20%σ 2Portfolio0.0 5% 1.0 13.5% 13.5% 20% 4000.2 5% 0.8 13.5% 11.8% 16% 2560.4 5% 0.6 13.5% 10.1% 12% 1440.6 5% 0.4 13.5% 8.4% 8% 640.8 5% 0.2 13.5% 6.7% 4% 161.0 5% 0.0 13.5% 5.0% 0% 0Problem8: Calculate the utility levels of each portfolio for an investor with A=3 and A=5.What do you conclude? 10 pointsanswers:Computing utility from U = E(r) – 0.005 ⨯ Aσ 2 = E(r) – 0.015σ 2 , we arrive at the values in the column labeled U(A = 3) in the following table:W Bills W Index r PortfolioσPortfolioσ 2Portfolio U(A = 3) U(A = 5)0.0 1.0 13.5% 20% 400 7.50 3.500.2 0.8 11.8% 16% 256 7.96 5.400.4 0.6 10.1% 12% 144 7.94 6.500.6 0.4 8.4% 8% 64 7.44 6.800.8 0.2 6.7% 4% 16 6.46 6.301.0 0.0 5.0% 0% 0 5.00 5.00The column labeled U(A = 3) implies that investors with A = 3 prefer a portfolio that is invested 80% in the market index and 20% in T-bills to any of the other portfolios in the table.The column labeled U(A = 5) in the table above is computed from:U = E(r) – 0.005 Aσ 2 = E(r) – 0.025σ 2The more risk averse investors prefer the portfolio that is invested 40% in the market index, rather than the 80% market weight preferred by investors with A = 3.。

小学上册英语第1单元真题试卷英语试题一、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 famous for its geothermal activity.2. A _______ (小蜻蜓) hovers over the water.3.Turtles can live for a ______ (很长的时间).4.I see a rainbow after the ___. (storm)5.My _____ (妈妈) is a great cook.6.What do you call a story that is made up?A. TrueB. FictionC. Non-fictionD. HistoryB7.My cousin is a fabulous ____ (singer).8.My cat will _______ (抓住) a toy mouse.9.World War II ended in ______ (1945年).10.The capital city of Ireland is __________.11.The _____ (beach) is sandy.12.I watch ______ on Saturday nights.13. A ____ is known for its strength and ability to lift heavy objects.14.My brother's favorite animal is a ______ (老虎).15.Planting trees is a great way to combat ______ (全球变暖).16.The flower petals are ______.17.The boy has a cool ________.18.The classroom is very ________.19. A __________ can occur when water mixes with soil and causes it to flow.20.Certain flowers are associated with ______, like roses for love. (某些花与情感相关，如玫瑰象征爱。

小学下册英语第6单元暑期作业(含答案)考试时间：100分钟（总分:120）A卷一、综合题(共计100题共100分)1. 填空题：Bees help _________ (授粉) flowers.2. 听力题：The Earth's axis is tilted at an angle of ______ degrees.3. 选择题：What is the capital of Seychelles?A. VictoriaB. MahéC. PraslinD. La Digue答案: A4. 选择题：What is 10 4?A. 6B. 5C. 4D. 7答案: A5. 选择题：What is the name of the famous explorer who discovered America?A. Marco PoloB. Christopher ColumbusC. Ferdinand MagellanD. Vasco da Gama答案:B6. 听力题：The process of dissolving sugar in water creates a _______.7. 听力题：My sister is a ______. She loves to explore museums.8. 听力题：Lunar and solar eclipses occur in ______.9. 听力题：The ice cream is _____ on a hot day. (refreshing)10. 听力题：The ____ has a bright blue color and is often found near water.11. 听力题：A ______ is a type of fish that can be found in rivers.12. 选择题：What is the name of the famous musician known for "Thriller"?A. Elvis PresleyB. Michael JacksonC. PrinceD. Madonna13. 听力题：I see a _____ (snake) in the grass.14. 填空题：The teacher is always __________ (耐心的) with us.15. 听力题：The symbol for hydrogen is _______.16. 选择题：What is the term for the amount of matter in an object?A. WeightB. VolumeC. DensityD. Mass答案:D17. 听力题：The ________ (tornado) is very dangerous.18. 听力题：The capital city of Comoros is __________.19. ers are cultivated for their ability to reduce ______ and promote healing. (某些花因其减压和促进愈合的能力而被种植。

Exercise 3Question 2. Virtual MemoryIn this section, you will use a program demonstrating how virtual memory is used.a. How does virtual memory work using a page table?First, the operation system uses many data structures to help itself finishing the task to manage the system of computer. The page table is one of them.When the system needs virtual memory, the page table must be initialized. Then, whenever we need access data, we should check the page table, to find whether the page which data include d in it in the RAMor whether have free blocks in RAM. If there is free block or the data has already in RAM, no page faultwill occupy. If not, there must a swap in and out; the page table must be refreshed.On the other hand, the system accomplishes transferring between real memory space and user space (logical memory space) by using page table.b. What is the primary purpose of virtual memory?The primary purpose of virtual memory is enlarging the memory logically. Through virtual memory, the program which need larger memory space than real memory space can be ran, and less address location needed. At the same time, every program runs in its own private address space. The programmer not pay close attention to the physical address of memory yet, all of the address transferred between logical and physical are completed by the mechanism of virtual memory.c. List three advantages of using virtual memory when executing a program.The program does not need to be loaded contiguously into RAM.The program does not need to be loaded completely into RAM.The program does not need to start at a specific physical address.Execute the Page Replacement Simulation program.Click on Paging.exe to run the application. Refer to Appendix A. Running a Visual Basic File if Paging.exe does not run.Notice the top of the program window indicates the number of request and total page faults. The table on the left represents RAM and the one on the right represents the hard disk. The order of requests is set at default. You can also enter your own order of requests. To change the speed of the simulation, you can use the speed adjuster at the bottom-left of the program window. Each time you click on Stop or Pause, the simulation ends after one complete memory access.Start the program using the default queue of requests.d. Describe what is happening for the first seven requests step-by-step for the default order of requests.e. When does a page fault occur, and how does the kernel handle a page fault? Without enough real memory, a page fault must be occurred when a program requests data.The interrupt triggers the operating system to fetch the data from a virtual memory and load it into RAM.The page fault handler then determines what must be done to resolve this page fault. It can:(1)Find where the desired page resides on disk and read it in (this is normally the case if there is free block in the RAM). The example is request 1.(2)Determine that the desired page is already in RAM (but not allocated to the current process) and reconfigure the MMU to point to it. The example is request 7.(3)If the RAM is full and the page fault handler finds the desired page resides on harddisk, a swap willbe occurred. The example is request 5.In case of (1) and (3), the page table must be refreshed.f. Enter a sequence of eight requests in place of the default order of requests in the program that would cause four page faults.g. In what case is it undesirable(不可取) to use virtual memory? If having only one hard disk device and the capacity is poor, or the program containing long task dependingon frequently I/O operation, using virtual memory will let the system very slowly. In the other case, the program need access the hard disk frequently, in the other word, the task let the disk very busy, and thiscase is also undesirable.h. Given a total paging file size of 267MB, and a RAM of size 256MB. Your applications are currently taking up 500MB of memory. How would you run an application that consumes 100 MB of memory? W e can run the application directly,because there is enough real memory. Even if we need virtual memory, this function has been encapsulated by the OS. That is to say, it’s none of our business, whether do need virtual memory or not.Question 3. TroubleshootingBelow are various problem scenarios. Select the most likely cause(s) for the problem from the Causes list.CausesA. Component not plugged inB. Application software errorC. Operating system errorD. Low RAME. Slow processorF. CMOS battery failureG. Motherboard failureH. Hard disk failureI. BIOS ROM failureJ. Appropriate component driver not installed properlyProblemsa. Program not respondingCauses: B. Application software error，D. Low RAMb. Screen froze after successfully bootingCauses: C. Operating system errorc. Programs running slowlyCauses: E. Slow processor ，D. Low RAMd. Peripheral device not working (mouse, keyboard, printer)Causes: A. Component not plugged in，J. Appropriate component driver not installed properlye. All necessary computer system components are plugged in, but the system does not bootCauses: G. Motherboard failure，I. BIOS ROM failuref. The computer is being booted, and an error message indicates that the hard drive cannot be found.Causes: H. Hard disk failureg. If low memory is a cause of the system running slowly, what can you do as a user to speed up the system? We can use the hard drive for virtual memory，or to expand our real RAM bye adding SDRAM storage .Question 4. File DirectoriesIn this question, you are given a zip file, which contains some folders and files. You will unzip the given file, manipulate the files and folders, zip the resulting file structure and submit it, along with answers to the questions in this exercise.First, download and save SSD2 File System.zip onto your Desktop. Then unzip the file.a. What is the absolute path of the file named test.txt in SSD2 File System folder? C:\Documents and Settings\Administrator\桌面\SSD2 File System\Temp3\test.txtb. How many parent directories does test.txt have? It has 6 parent directories.c. Create a shortcut of test.txt and place it in the same directory. Rename the shortcut “MyTest”. Copy and paste a screenshot showing the fileproperty of MyTest.d. Examine the file property of test.txt. Explain why the values for Size and Size on disk are different. What is the term for the difference between the two sizes? From the file property of test.txt we can get the values for size is 4 bytes but this file occupies 8KB. Because in modern computer systems, cluster is the smallest amount of space any file can occupy on a disk. In this computer, a cluster is 8kB, that is to say, the file occupies the space at least8KB, even its size is less than 8 KB in fact.e. Opening MyTest or test.txt both result in the display of the file. Explain the difference between MyTest and test.txt. MyTest is a shortcut, while test.txt is the target file.A shortcut only refers to its target, but not a copy of the target. It is just a pointer to the target. When we move the target file to other place, the shortcut will not work correctly.f. What are the different file extensions in folder Temp1? They are four types of file, and their extensions are: .gif , .html, .htm and .xml.g. List the most recently modified item in SSD2 File System folder.The most recently modified item is the shortcut named MyTest which was built just now.Unit 3 and Unit 4 Review Materials14. Virtual Memorya.What three advantages does the course mention, regarding virtualmemory?The program does not need to be loaded contiguously into RAM.The program does not need to be loaded completely into RAM.The program does not need to start at a specific physical address.b.What is one disadvantage of virtual memory?Virtual memory can slow access to data because it is stored on the hard drive which issignificantly slower than physical RAM.c.What data is contained in a swap file and where does the swap filereside?A swap file contains data about all virtual memory pages that is stored in "RAM". Itis a system file stored on the hard drive.d.How does virtual memory work using a page table?The page table maintains the list of mappings for virtual addresses to real addresses,and real addresses to virtual ones.e.Given pages 2, 3, and 5 are already in main memory (the memory isnot yet full). What happens when a request for page 6 is made? What role does the kernel play in processing this request?A page fault occurs which leads the processor to stop execution and give control tothe kernel. The kernel loads in the page being used into RAM and updates the pagetable. Then the process resumes executing the instructions.。

作业中和作业后的英语### 作业中和作业后的英语在作业中1. Vocabulary Building: When working on homework, it's essential to expand your vocabulary. Use a dictionary or an online resource to look up words you don't understand.2. Grammar Practice: Focus on the grammar rules that are new or challenging to you. Practice them with exercises and try to apply them in your writing.3. Reading Comprehension: Read the assigned texts carefully. Take notes on the main ideas and supporting details. Thiswill help you answer questions about the text.4. Writing Assignments: For essay assignments, plan your essay before you start writing. Create an outline that includes an introduction, body paragraphs, and a conclusion.5. Listening Exercises: If your homework includes listening to English, try to listen to the recording multiple times. Focus on understanding the main points and taking notes.6. Speaking Practice: Practice speaking English with a friend or family member. If you don't have someone to practice with, try speaking aloud to yourself or recording your voice.在作业后1. Review: After completing your homework, review the material to reinforce what you've learned. This can help with retention.2. Self-Assessment: Evaluate your own work. Look for areas where you struggled and think about how you can improve.3. Ask for Feedback: If possible, ask your teacher or classmates for feedback on your work. This can provide valuable insights into your strengths and weaknesses.4. Engage in Additional Practice: If you feel you need more practice, find additional exercises or resources online. There are many free resources available to help you improve.5. Reflect on Your Learning: Take some time to think about what you've learned and how you can apply it to other areas of your life.6. Prepare for the Next Assignment: Look ahead to the next assignment and start preparing early. This can help reduce stress and ensure you have enough time to complete the work to the best of your ability.7. Relax and Enjoy: Remember to take breaks and enjoy your free time. Balancing work and relaxation is important for maintaining a healthy study routine.。

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100小题，每小题1分，共100分.每小题不选、错误，均不给分)1.How many wheels does a bicycle have?A. OneB. TwoC. ThreeD. Four2.What is the name of the process of making something less clean?A. PollutingB. ContaminatingC. DirtyingD. SoilingA3.ic Ocean is the ________ (最大的) ocean. The Paci4. A chemical reaction can involve the release of ______.5.The ______ is a layer of solid rock beneath the Earth's surface.6.The __________ (历史的多样性诠释) enrich understanding.7. A physical property can be observed without changing the ______.8.What is the main ingredient in pizza?A. BreadB. RiceC. PastaD. ChickenA9.The chemical symbol for hydrogen is ______.10.We can _______ a road trip together.11.What do you call a baby tiger?A. CubB. KitC. PupD. Calf12.The ______ is the main organ for breathing.13.The ______ is a skilled dancer.14.My mom is cooking ________ for dinner.15.What do we call a person who catches fish?A. FishermanB. AnglerC. MarinerD. All of the above16. A sunny day is great for ______ (骑自行车).17. A ________ (袋鼠) can jump very high and carries its baby in a pouch.18.The _______ (小狩猎者) stalks its prey quietly.19.The library has many ______ (books).20. A ____(estuary) is where freshwater meets saltwater.21.The ________ (lantern) lights up the night.22.The invention of the computer transformed modern _____.23.The __________ (历史的复杂关系) enhance understanding.24.The walrus has large tusks used for ______ (保护).25.My teacher is very __________ (和蔼可亲).26. A _______ is a device that can measure electrical resistance.27.How many days are in a leap year?A. 365B. 366C. 364D. 36028.The ancient Greeks participated in ________ to foster community spirit.29.I love to watch the ____ fly.30.She is _____ (happy/sad) about her birthday.31.Elements are arranged in the periodic table by their ________ number.32.What is the color of an orange?A. RedB. OrangeC. YellowD. Green33.The rabbit is ________ in the garden.34.We can ___ a picnic in the park. (have)35.The ________ (solution) solves the problem.36.My favorite game is ________.37.What is the name of the sport played with a round ball and a net?A. BasketballB. SoccerC. VolleyballD. HandballA38.My ______ likes to cook delicious food.39.The _______ (小鳄鱼) sunbathes on the riverbank.40.The ________ was a significant event in the history of the United States.41.What is the name of the famous American singer known for "Respect"?A. Aretha FranklinB. Billie HolidayC. Ella FitzgeraldD. Nina SimoneA42.The peacock spreads its _______ (羽毛) to attract mates.43.We will go ______ for ice cream later. (out)44.Which of these is a mode of transportation?A. BicycleB. DeskC. ChairD. Bed45.The _____ (星星) guide sailors.46.I take _____ (照片) of my friends.47.My ______ is very kind and helpful.48.What is the main language spoken in the United States?A. SpanishB. FrenchC. GermanD. EnglishD49.The parakeet flies _______ (自由) in the room.50.Elements in the same group of the periodic table have similar ______.51.The chemical formula for lead(II) oxide is ______.52.I can ________ my homework alone.53.The ______ (小鸟) finds a safe spot to rest in the tree.54.The chemical process of breaking down substances is called _______.55.The _____ (温室) allows for year-round gardening.56.What do you call the person who studies the stars?A. BiologistB. AstronomerC. ChemistD. GeologistB57.Did you hear the _____ (小狗) barking at the mailman?58.The elephant is the largest _______ (动物).59.An object in free fall experiences only the force of ______.60. A _______ is a chemical reaction where energy is absorbed.61._____ (weeds) can compete with other plants.62. A dolphin has a special organ called a ________________ (喷气孔).63.Which bird is known for its ability to mimic sounds?A. SparrowB. ParrotC. EagleD. PenguinB64.What do you call the person who teaches students?A. DoctorB. TeacherC. ChefD. ArtistB65.ts can improve water ______ and soil quality. (某些植物可以改善土壤质量和水分保持能力。

武汉2024年06版小学英语第六单元暑期作业考试时间:90分钟（总分:110）考试人：_________题号一二三总分得分评级介绍：武汉2024年06版小学D卷英语第六单元暑期作业侧重基础词汇和句型，难度适中，旨在巩固学生的听说读写能力，帮助他们轻松过渡到新学期。

一、(选择题)总分:20分(2分/题)1、What is the English word for "收割"?A, HarvestingB, PlantingC, WeedingD, Sowing2、What do we call the tiny hair-like structures on roots?我们称根部上的细毛状结构为？A, Root hairsB, FibersC, StalksD, Tendrils3、Which day comes after Monday?A, SundayB, TuesdayC, WednesdayD, Thursday4、What is the English word for "蚂蚁"?A, BeeB, AntC, FlyD, Spider5、What is the main ingredient in a smoothie?A, IceB, JuiceC, FruitD, Milk6、What type of animal is a dolphin?A, FishB, MammalC, ReptileD, Amphibian7、Which part of the plant is responsible for nutrient transport?中文解释：植物的哪个部分负责养分运输？A, RootsB, StemC, Leaves8、What is the name of the famous clock tower in London? A, Big BenB, Eiffel TowerC, Leaning TowerD, Colosseum9、What is the English translation of "鳄鱼"?A, CrocodileB, AlligatorC, LizardD, Salamander10、What is the main ingredient in pancakes?A, FlourB, SugarC, MilkD, Eggs11、What is the English word for "运动服"?A, Casual WearB, SportswearC, Formal WearD, Outdoor Gear12、He enjoys watching movies. 他喜欢看电影。

2024年09版小学六年级下册英语第6单元暑期作业(含答案)考试时间：100分钟（总分:100）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 find ________ (天文学) very fascinating.2、听力题：The chemical symbol for californium is ______.3、Which instrument is used to measure temperature?A. BarometerB. ThermometerC. AltimeterD. Speedometer4、How do you say "thank you" in French?A. GraciasB. MerciC. DankeD. Arigato5、填空题：A gazelle can leap over ______ (障碍物).6、填空题：I can ______ my homework quickly.7、填空题：We can play dress-up with our ________ (玩具).8、What is the capital of Denmark?A. OsloB. StockholmC. Copenhagen答案:C9、What is 100 divided by 10?A. 5B. 10C. 15D. 20答案:B10、What do we call the hot season of the year?A. WinterB. SpringC. SummerD. Autumn11、填空题：The __________ is a natural wonder located in the United States. (黄石公园)12、填空题：The wild boar is known for its _________ (野性).13、填空题：The dolphin is a ______ (社交的) animal.14、听力题：The bird is singing in the __________.15、听力题：A ______ is a large area of flat land at a high elevation.16、填空题：The _____ (greenhouse) helps plants grow year-round.17、What shape is a basketball?A. SquareB. TriangleC. CircleD. Oval答案:C18、Which vegetable is known for making people cry?A. CarrotB. OnionC. Potato答案: B. Onion19、听力题：Mercury has a very thin ______.20、What is 20 5?A. 10B. 15C. 20D. 25答案: B21、听力题：The rabbit is hiding in the ___ (bush).22、填空题：My brother loves playing __________ (电子游戏).23、填空题：The __________ is often very pleasant in spring. (气候)24、填空题：My friend is a skilled _______ (职业). 她能 _______ (动词)很多事情.25、Which bird is known for its colorful feathers and can talk?A. SparrowB. ParrotC. PigeonD. Eagle答案:B26、听力题：The __________ helps to keep the body warm.27、How many colors are there in a rainbow?A. 5B. 6C. 7D. 8答案:C28、What type of animal is a frog?A. ReptileB. MammalC. AmphibianD. Fish29、What is the name of the famous painting by Leonardo da Vinci?A. The ScreamB. Starry NightC. Mona LisaD. The Last Supper答案:C30、听力题：A rabbit's teeth keep growing, so it needs to ______.31、What is the capital of New Zealand?A. WellingtonB. AucklandC. ChristchurchD. Dunedin答案: A32、填空题：The _______ (狐狸) is very sly.33、填空题：I have a collection of _______ (书籍) at home.34、听力题：The __________ is known for its artistic community.35、填空题：A __________ (植物园) showcases many types of plants.36、填空题：We can _____ (preserve) rare plant species.37、听力题：The capital of Spain is __________.38、What is the capital of Russia?A. KyivB. MinskC. MoscowD. St. Petersburg39、填空题：My toy dinosaur is very _______ (我的玩具恐龙非常_______).My __________ (玩具名) has many __________ (形容词) colors.41、听力题：The main product of anaerobic respiration is ______.42、填空题：The _______ (小青蛙) jumps high when it’s scared.43、What is the largest planet in our solar system?A. EarthB. MarsC. JupiterD. Venus44、听力题：The stars are ___ (shining) in the dark.45、听力题：The flowers are ______ in the garden. (blooming)46、听力题：I have a ________ (dream) of traveling.47、What is the primary color of a cantaloupe?A. OrangeB. YellowC. GreenD. Red48、听力题：My favorite subject is ________ (science).49、填空题：The penguin waddles across the ______ (冰).50、填空题：My friend is very __________ (勤奋的).51、选择题：What is the name of the famous explorer who discovered America?A. Marco PoloB. Christopher ColumbusC. Ferdinand MagellanD. Vasco da Gama_____ (蜜蜂) help pollinate many crops.53、填空题：My pet hamster is very ______ (活泼).54、听力题：I want to learn how to ______ (cook) dishes from different countries.55、听力题：The _____ (花) smells sweet.56、听力题：The fish is swimming in the ___. (tank)57、听力题：I can ___ (tie) my shoelaces.58、填空题：A wildcat is a small ________________ (猫).59、填空题：A __________ (化学比赛) fosters interest and knowledge among students.60、填空题：In the garden, I planted _____ (多种) vegetables like carrots and tomatoes.61、听力题：A polar solvent is one that can dissolve ______ molecules.62、选择题：What is the color of a typical pumpkin?A. OrangeB. YellowC. GreenD. Red63、填空题：The ________ (生态教育活动) raises awareness.64、What are the primary colors?A. Red, Blue, YellowB. Green, Orange, PurpleC. Black, White, GrayD. Pink, Brown, Teal答案:A65、听力填空题：I enjoy celebrating my birthday. Each year, I invite my friends to __________. We have fun playing games and enjoying cake together.66、听力题：The man has a funny ________.67、What is the term for a baby pig?A. CalfB. PigletC. FoalD. Kit答案:B68、填空题：The first man on the moon was _______. (尼尔·阿姆斯特朗)69、How do you greet someone in the morning?A. Good nightB. Good afternoonC. Good morningD. Good evening答案:C70、听力题：The Earth's surface is composed of various geological ______ types.71、填空题：The __________ (历史重演) can occur in different forms.72、听力题：The chemical formula represents the _____ of atoms in a molecule.73、填空题：I get inspired by seeing other kids play with their ________ (玩具名).74、What is the capital of Vietnam?a. Ho Chi Minh Cityb. Hanoic. Da Nangd. Hue答案:b75、听力题：I like to _____ (dance) at parties.76、听力题：The chemical symbol for rubidium is _______.77、What is the main source of energy for the Earth?A. MoonB. StarsC. SunD. Wind答案: C78、填空题：I dream of becoming a ______ (医生) one day. I want to help people and make them feel ______ (健康).79、听力题：The _____ (相机) captures memories.80、填空题：The __________ (田野) are green in the spring.81、What is the capital of Lesotho?a. Maserub. Teyateyanengc. Maputsoed. Mohale's Hoek答案:a82、听力题：The kitten is ______ (playing) with a feather.83、What is the opposite of "up"?A. DownB. LeftC. RightD. Forward84、填空题：My best friend is very __________. (体贴)85、选择题：What do we call a group of fish swimming together?A. SchoolB. PodC. FlockD. Pack86、填空题：The invention of the compass allowed for safer _____.87、听力题：The Earth's rotation takes about ______ hours.88、填空题：We sing _______ (歌曲) in music class.89、What is the longest river in the world?A. AmazonB. NileC. MississippiD. Yangtze答案:B90、填空题：My favorite snack is ______.91、听力题：The chemical formula for ammonium phosphate is ______.92、ocean floor) features ridges and valleys. 填空题：The ____93、填空题：I always try to be ______ (乐观) and see the good side of things. Positivity can make a big difference.94、填空题：I saw a ________ swimming in the ocean.95、填空题：The invention of ________ has significantly altered communication.96、听力题：The Andromeda Galaxy is on a collision course with the _______.97、听力题：I enjoy _____ to music in my free time. (listening)98、What is the name of the planet we live on?A. MarsB. EarthC. JupiterD. Saturn99、填空题：I like to take care of my ________ every day.100、填空题：I am proud of my _______ (成就). It took a lot of hard work and _______ (努力).。

小学下册英语第六单元暑期作业(含答案)考试时间：80分钟（总分:140）A卷一、综合题(共计100题共100分)1. 听力题：The study of how rocks and minerals interact is called ______ geology.2. ts are adapted to _____ (极端) environments. 填空题：Some pla3. 选择题：What is the strongest muscle in the human body?A. HeartB. TongueC. ArmD. Leg答案：B4. 填空题：I can ______ (做到) my best in everything I try.5. 填空题：The __________ (历史的教育) shapes our understanding.6. 听力题：A force can change an object’s ______.7. 选择题：What is the name of the tiny particles that make up matter?A. AtomsB. MoleculesC. IonsD. Electrons8. 听力题：A ______ is a natural opening in the Earth’s crust through which gases and lava escape.The capital of Brazil is ________ (巴西的首都是________).10. 选择题：What do we call the main character in a story?A. ProtagonistB. AntagonistC. HeroD. Villain11. 听力题：The _______ of a wave is how far it travels in one cycle.12. 填空题：My _____ (爷爷) tells great stories.13. 选择题：Which instrument has black and white keys?A. GuitarB. DrumsC. PianoD. Violin答案:C14. 填空题：My favorite color is _______ (紫色).15. 选择题：How many wheels does a bicycle have?A. 1B. 2C. 3D. 4答案:B16. 选择题：What do we call a person who studies the universe?A. AstronomerB. AstrophysicistC. CosmonautD. Cosmologist答案：A17. 听力题：Astronauts train for missions in _______ environments.What is the name of the superhero with a shield?A. BatmanB. Captain AmericaC. ThorD. Iron Man答案:B19. 听力题：A sound's timbre is related to its ______.20. 选择题：What do you call the act of moving quickly on foot?A. WalkingB. RunningC. JumpingD. Dancing答案: B21. 选择题：What do you call the season when leaves fall from trees?A. SpringB. SummerC. FallD. Winter答案:C22. 填空题：Planting diverse species can enhance the resilience of your ______. (种植多样物种可以增强系统的韧性。

2024年06版小学4年级英语第六单元暑期作业考试时间:60分钟（总分:110）考试人：_________题号一二三总分得分评级介绍：2024年06版小学4年级O卷英语第六单元暑期作业，难度适中，重点在于词汇运用和简单句型理解，旨在巩固学生的英语基础知识，提高语言表达能力。

一、选择题(共计20题，共40分)1、What is the English word for "蛇"?A, LizardB, TurtleC, SnakeD, Frog2、Which of the following means "书包" in English?A, BagB, BackpackC, SuitcaseD, Pouch3、How many months are there in a year?A, 10B, 11C, 12D, 134、How many colors are in a rainbow?A, 5B, 6C, 7D, 85、What do we call a plant that grows in shallow water?我们称生长在浅水中的植物为？A, Marsh plantB, Aquatic plantC, Terrestrial plantD, All of the above6、What is the English translation of "大猩猩"?A, ChimpanzeeB, GorillaC, OrangutanD, Baboon7、What is the English translation of "松鼠"?A, ChipmunkB, RatC, SquirrelD, Mouse8、What does "园艺" mean in English?A, GardeningB, FarmingC, PlantingD, Harvesting9、What do we call the person who sells goods in a store? A, CustomerB, CashierC, ShopkeeperD, Manager10、What is the English word for "土狼"?A, HyenaB, African wild dogC, CoyoteD, Wolf11、Which plant is famous for its soothing properties?中文解释：哪种植物以其舒缓特性而闻名？A, LavenderB, CactusC, Pine12、What is the English word for "豌豆"?A, PeaB, BeanC, LentilD, Chickpea13、What is the past tense of "go"?A, GoedB, WentC, GoesD, Going14、What do you call a baby dog?A, KittenB, PuppyC, Cub15、What is the English word for "市场"?A, MallB, MarketC, StoreD, Shop16、What do we call the process of a plant growing from a seed?我们称植物从种子生长的过程为？A, GerminationB, PollinationC, FertilizationD, Photosynthesis17、What is the English translation of "编程"?A, ProgrammingB, CodingC, SoftwareD, Hardware18、What is the opposite of "sweet"?中文解释："甜"的反义词是什么？A, BitterB, SaltyC, Sour19、Which one is NOT a primary color?A, RedB, BlueC, YellowD, Green20、Which of these is a planet?A,SunB,MoonC,EarthD,Star二、听力题(共计20题，共40分)1、What do you call the weather when it rains a lot?A, SunnyB, CloudyC, StormyD, Windy2、What do cows produce?A, MilkB, EggsC, HoneyD, Meat3、How many continents are there?A, FiveB, SixC, SevenD, Eight4、What do you call a small, round fruit that is often red or green?A, OrangeB, GrapeC, AppleD, Banana5、What is the name of the red fruit that is often mistaken for a vegetable? A, TomatoB, PotatoC, CarrotD, Onion6、How many hours are in a day?A, TwentyB, EighteenC, Twenty-fourD, Twelve7、What do you call the art of making pictures with paint?A, DrawingB, SculptingC, PaintingD, Photography8、What is the name of the famous structure in Egypt?A, The ColosseumB, The Eiffel TowerC, The Great PyramidD, The Taj Mahal9、听力填空题：A ______ is a person who studies plants.10、听力填空题：They ___ (not/go) camping this summer.11、听力填空题：She ___ (write) a letter to her friend.12、听力填空题：I ___ (wake) up at six every day.13、听力填空题：She ___ (plant) flowers in her garden.14、听力填空题：We ___ (go) to the beach every summer.15、What do we call the act of planting seeds in the ground? A, HarvestingB, SowingC, WateringD, Growing16、What is the opposite of light?A, BrightB, DarkC, ClearD, White17、What is the name of the device used to take pictures? A, CameraB, PhoneC, ProjectorD, Monitor18、听录音，按你所听到的顺序为下列句子排序。

Continuation writing (the first lesson)导学案Learning Aim:B y the end of the class, we will be able to:➢have a clear map of the story and obtain a good understanding of the text;➢learn how to analyze, infer, develop and create a logical and reasonable ending of the story by mind-mapping;➢organize information, ideas and language logically and reasonably;➢learn to develop creative thinking.Brainstorming: watch and answer1.What will the man (Chris) do?2.How can you predict the following story?Main task: to continue to write a story logically and reasonably.2020年7月新高考全国卷1 山东第二节（满分25分）阅读下面材料, 根据其内容和所给段落开头语续写两段, 使之构成一篇完整的短文。

The Meredith family lived in a small community, As the economy was in decline, some people in the town had lost their jobs. Many of their families were struggling to make ends meet. People were trying to help each other meet the challenges.Mrs. Meredith was a most kind and thoughtful woman. She spent a great deal of time visiting the poor. She knew they had problems, and they needed all kinds of help. When she had time, she would bring food and medicine to them.One morning she told her children about a family she had visited the day before. There was a man sick in bed, his wife, who took care of him and could not go out to work, and their little boy. The little boy -his name was Bernard-had interested her very much.“I wish you could see him,” she said to her own children, John, Harry, and Clara. “He is such a help to his mother. He wants very much to earn some money, but I don't see what he can do.”After their mother left the room, the children sat thinking about Bernard. “I wish we could help him to earn money.” said Clara. “His family is suffering so much.”“So do 1,” said Harry. “We really should do something to assist them.”For some moments, John said nothing, but, suddenly, he sprang to his feet and cried, “I have a great idea! I have a solution that we can all help accomplish（完成）.”The other children also jumped up all attention. When John had an idea, it was sure to be a good one. “I tell you what we can do,” said John. “You know that big box of corn Uncle John sent us? Well, we can make popcorn（爆米花）, and put it into paper bags, and Bernard can take it around to the houses and sell it.”注意：1. 续写词数应为150左右：2. 请按如下格式在答题卡的相应位置作答。

homework参考答案Homework 参考答案Section 1: Math ProblemsProblem 1:Simplify the following quadratic equation:x^2 + 5x + 6 = 0.Solution:To simplify the quadratic equation, we need to factorize it.(x + 2)(x + 3) = 0.Therefore, the roots of the equation are x = -2 and x = -3.Problem 2:Calculate the area of a circular garden with a radius of 6 meters, using the formula xx^2.Solution:Using the given formula, we can substitute the value of the radius to calculate the area.Area = x× 6^2 ≈ 113.1 square meters.Section 2: History QuestionsQuestion 1:What were the main causes of World War II?Answer:The main causes of World War II can be attributed to several factors, including:1. Treaty of Versailles: The harsh conditions imposed on Germany after World War I led to bitterness and resentment, creating a fertile ground for the rise of Adolf Hitler and the Nazi Party.2. Failure of Appeasement: The policy of appeasement pursued by Britain and France towards Nazi Germany allowed Hitler to annex territories without facing any significant consequences. This emboldened him to pursue further expansion.3. Rise of Fascism: The rise of fascist dictators, such as Hitler in Germany, Mussolini in Italy, and Tojo in Japan, fueled aggression and territorial ambitions, leading to conflicts that eventually escalated into a global war.4. Economic Depression: The Great Depression of the 1930s crippled economies worldwide, causing social unrest and political instability, which created conditions conducive to the outbreak of war.Question 2:What were the major consequences of the Cold War?Answer:The major consequences of the Cold War can be summarized as follows:1. Arms Race: The Cold War between the United States and the Soviet Union led to a nuclear arms race, with both nations stockpiling weapons of mass destruction. This arms race increased tensions and the danger of a nuclear conflict.2. Proxy Wars: The Cold War played out through proxy wars in different regions, such as the Korean War and the Vietnam War. These conflicts caused immense human suffering and geopolitical instability.3. Space Race: The competition for technological supremacy between the United States and the Soviet Union resulted in the Space Race. This led to significant advancements in space exploration and technology.4. Division of the World: The Cold War resulted in a division of the world into two ideological blocs – the Western bloc led by the United States and the Eastern bloc led by the Soviet Union. This division impacted global politics for decades.Section 3: Literature AnalysisIn the novel "To Kill a Mockingbird" by Harper Lee, the theme of racial prejudice and injustice is explored through the events surrounding the trial of Tom Robinson, a black man falsely accused of rape.The author skillfully portrays the deeply ingrained racism prevalent in the society of Maycomb, Alabama, during the 1930s. Through Scout's innocent perspective, we witness the irrational fears and prejudices that govern the townspeople's reactions to Tom's trial.Atticus Finch, Scout's father and a lawyer who defends Tom, emerges as a moral compass, demonstrating unwavering integrity and courage amidst asociety plagued by racial discrimination. The trial serves as a catalyst for Atticus to expose the injustices and hypocrisy of a system that fails to uphold justice and equality.Through the character of Boo Radley, Lee also explores the theme of prejudice against those who are different or misunderstood. Boo, initially seen as a mysterious and potentially dangerous figure, ultimately proves to be a benevolent and compassionate person. This challenges the reader's prejudices and highlights the damaging effects of snap judgments based on appearances.In conclusion, "To Kill a Mockingbird" tackles the themes of racial prejudice and injustice, shedding light on the destructive consequences of discrimination and the importance of standing up for what is right. Lee's masterful storytelling and compelling characters make this novel a timeless exploration of societal issues that are still relevant today.Note: The above article is a sample response to the given title and is not an actual homework answer.。

英语作文《作业帮》Homework Help。

Homework is an essential part of the learning process. It helps students to reinforce the knowledge they have gained in class and to develop important skills such as time management and critical thinking. However, sometimes students may struggle with their homework due to various reasons such as lack of understanding of the topic, time constraints, or simply feeling overwhelmed by the workload. In such cases, seeking homework help can be a great solution.There are various resources available for students to seek homework help. One of the most popular options is online tutoring services. These services provide students with access to qualified tutors who can help them withtheir homework in a wide range of subjects. Online tutoring is convenient as it allows students to get help from the comfort of their own home and at a time that suits them.Additionally, online tutoring services often offer avariety of resources such as practice exercises and study materials to help students further understand the topic.Another option for homework help is peer tutoring. Many schools and colleges have peer tutoring programs where students can receive help from their classmates who have a strong understanding of the subject. Peer tutoring can be beneficial as it allows students to learn from their peers in a relaxed and informal setting. It also helps to foster a sense of community and collaboration among students.In addition to online tutoring and peer tutoring, students can also seek help from their teachers. Teachers are a valuable resource for students as they have a deep understanding of the subject matter and can provide personalized assistance to help students overcome their difficulties with homework. Students should not hesitate to ask their teachers for help when they are struggling with their homework.Furthermore, there are numerous educational websitesand apps that offer homework help in the form of video tutorials, interactive exercises, and study guides. These resources can be a great supplement to traditional homework help methods and can provide students with additional support and guidance.It is important for students to take advantage of the various homework help resources available to them. Seeking help with homework not only helps students to improve their academic performance but also fosters a positive attitude towards learning. By seeking help when needed, students can develop a deeper understanding of the subject matter and build important skills that will benefit them in the long run.In conclusion, homework help is a valuable resource for students who are struggling with their homework. Whether it is through online tutoring, peer tutoring, teacher assistance, or educational websites and apps, there are numerous options available for students to get the help they need. By taking advantage of these resources, studentscan overcome their difficulties with homework and achieve academic success.。