第七次作业(1)

华东理工高等数学作业本第7次作业答案第2章（之6）第7次作业教学内容：§2.2.4极限的运算法则E §2.2.5无穷小的比较**1．试求下列极限：（1）xx x 10211lim ??? ??+→；（2）111)313(lim -→++x x x x ；（3）x x x sin 20)31(lim +→;（4）nnn x 2sin2lim ∞→（x 为不等于零的常数）.解：（1）xx x 10211lim ??? ??+→=22211])21[(lim 1ex x x =+→（2） 2132132)1(231111e lim 3221lim )313(lim ==??+-+=+++→+?-+→-→xx xx xx x x ex x xx .（3）xx x sin2)31(lim +→6e =.(4) 原式=xx nnn =?∞→22lim .**2．试求()x x f cos =的导数。

解：()()x x x x x f x ?-?+='→?cos cos lim 0x x x x x ????? ?+-=→?2sin2sin 2lim 022sin2sin lim 0x xx x x+-=→?22sinlim 2sin lim 00x xx x x x+-=→?→?x sin -=，()()x x x f sin cos -=' ='∴.**3。

的存在性研究极限)0(cos 22lim >-→a xaxx .解：x ax x 2sin2lim→=原式axax x ax x x ==++→→2sin2lim2sin 2limaxax x ax x x -=-=--→→2sin2lim2sin 2lim，所以原极限不存在由于左、右极限不相等.4．选择题**（1）时（），则当，设133)(11)(3→-=+-=x x x xx x βα.)()()(; )()()(; )()()(;)()()(高阶的无穷小是比高阶的无穷小是比是等价无穷小与等价无穷小是同阶无穷小，但不是与x x D x x C x x B x x A αββαβαβα答：A**(2)在点，则曲线为可导函数且满足设)(12)()(lim)(0x f y xx a f a f x f x =-=--→处的切线斜率为， 2)(1)(1)(2)()())((--D C B A a f a分析：1)(21)()(lim212)()(lim-='=---=--→→a f xa f x a f xx a f a f x x ，2)(-='∴a f .)(D 答**(3)设xx x f sin )2()(+=，则)(x f 在0=x 处 ( )（A ）2)0(='f （B ）0)0(='f （C ）1)0(='f （D ）不可导=+=-→→2)2(sin lim )0()(lim 00x x x x f x f x x)(A 答***5．适当选取A 、k 的值，使下式成立：kAx x x ~sin 1tan 1+-+（当0→x ）.解：x x xx x xx x x x x sin 1tan 1)cos cos 1(sin sin 1tan 1sin tan sin 1tan 1++ +-=+++-=+-+x x x x x cos )sin 1tan 1(2sin2sin 2+++?=，0→x时，x x ~sin ，∴ 上式等价于 411)2(232xx x =+??，3,41==∴k A .6．当0→x 时，试确定下列各无穷小对x 的阶数. *（1）2310000x x +； **（2）31)1(x x x +解：（1）1000010000lim2230=+→xxx x ，∴ 阶数为2。

实验报告（二）院（系）理学院课程名称：数学实验日期班级B1111 学号12 实验室文理楼209 专业数学教育姓名樊美林计算机号实验名称数学实验成绩评定所用软件Matlab 教师签名实验目的或要求1.实验步骤、心得体会1. 求下列函数的极小点：1) ()2123222118294xxxxxXf+-++=；、function f = fun1(x)f=x(1)^2+4*x(2)^2+9*x(3)^2-2*x(1)+18*x(2);x0=[1,1,2]x=fminunc('fun1',x0);y=fun1(x)y=-21.25002)()212122212223xxxxxxXf-+-+=；function f = fun1(x)f=x(1)^2+(3/2)*x(2)^2+2*x(1)*x(2)+x(1)-2*x(2);x0=[1,1]x=fminunc('fun1',x0)y=fun1(x)y =-4.75003)()()42121f X x x=-+.function f = fun2(x)f=(x(1)-1)^4+x(2)^2；x0=[0,1]x=fminunc('fun2',x0);y=fun2(x)y =4.0848e-010第1），2）题的初始点可任意选取，第3）题的初始点取为()TX1,00=.2. 梯子长度问题一楼房的后面是一个很大的花园. 在花园中紧靠着楼房有一个温室,温室伸入花园2m,高3m,温室正上方是楼房的窗台. 清洁工打扫窗台周围,他得用梯子越过温室,一头放在花园中,一头靠在楼房的墙上. 因为温室是不能承受梯子压力的,所以梯子太短是不行的.现清洁工只有一架7m 长的梯子,你认为它能达到要求吗? 能满足要求的梯子的最小长度为多少?问题分析：（对问题作出分析，如果问题过于简单，可以不作分析） 模型建立：（建立数学模型） 结果：（求解的结果）分析：（对求解结果进行分析）其他：（模型的缺点和优点以及改进方向，如果没有，可以不写）模型的求解：（求解所用的软件，求解该问题的源代码）3. 陈酒出售的最佳时机问题某酒厂有批新酿的好酒,如果现在就出售,可得总收入R 0=50万元(人民币),如果窖藏起来待来日(第n 年)按陈酒价格出售,第n 年末可得总收入60n eR R (万元),而银行利率为r=0.05,试分析这批好酒窖藏多少年后出售可使总收入的现值最大. (假设现有资金X 万元,将其存入银行,到第n 年时增值为R(n)万元,则称X 为R(n)的现值.)并填下表：第一种方案：将酒现在出售，所获50万元本金存入银行； 第二种方案：将酒窖藏起来，待第n 年出售。

小学上册英语第1单元暑期作业英语试题一、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 is a _____ (学生) who enjoys literature.2.I enjoy cooking ______ (美味) meals to share with my family.3.I enjoy sharing stories with my friends during ______ (聚会).4. c region is known for its ________ (极昼和极夜). The Azte5.The __________ (自然环境) is full of wonders waiting to be explored.6.ts are _____ (medicinal) and help us stay healthy. Some pla7.His favorite sport is ______ (basketball).8.The train travels ________ the city.9.We like to ________ together.10._____ (果树种植) requires specific knowledge.11.When you mix vinegar and baking soda, you get __________.12.I enjoy playing with my ________ (玩具车) during playtime.13.The process of decomposition breaks down compounds into _______ substances.14.What is the term for a baby meerkat?A. PupB. KitC. CalfD. ChickA15.What part of the plant absorbs water?A. LeafB. StemC. RootD. FlowerC16.The flowers in the garden are _______ and fragrant.17.The raccoon is often seen at _________. (夜晚)18.What do we call the largest type of shark?A. HammerheadB. Great whiteC. Whale sharkD. Tiger sharkC Whale shark19.Gardening is a wonderful way to connect with ______ (自然).20.The fish swims in _______ (优雅).21.I have a great relationship with my ____.22.I like to try new _______ (食物) from different countries. It’s _______ (形容词) to taste new flavors.23. A ______ is a type of bond where electrons are transferred.24.What do we call the large body of salt water that covers most of the Earth?A. OceanB. SeaC. LakeD. RiverA Ocean25.The _______ (The Great Depression) prompted major changes in government policy.26.The ________ loves to explore new places.27.The squirrel hides its ______.28.The ________ is a small animal.29.Which of these is a marine animal?A. EagleB. SharkC. LionD. Elephant30.What color is the sky?A. GreenB. BlueC. RedD. Yellow31.I always brush my ______ in the morning.32. A reaction that occurs spontaneously is called a ______ reaction.33.The kangaroo hops across the _________. (平原)34.What is the opposite of "up"?A. DownB. LeftC. RightD. ForwardA35.What do we call the science of living organisms?A. ChemistryB. BiologyC. GeologyD. Ecology36.I think teamwork is essential. In group projects, I like to __________.37. A ______ is a visual aid used to explain concepts.38.What is the name of the famous scientist known for his laws of motion?A. Isaac NewtonB. Albert EinsteinC. Nikola TeslaD. Stephen Hawking39.My favorite activity is ______ (骑行).40.What do we call a young dolphin?A. CalfB. PupC. KidD. Foal41.We have a big ___. (garden)42.The butterfly rests on a ____.43.What is the capital of the Netherlands?A. AmsterdamB. HagueC. RotterdamD. UtrechtA44.What is the capital of Finland?A. HelsinkiB. OsloC. StockholmD. ReykjavikA45.The ice cream is _____ (melting/frozen).46.What is the capital city of the Netherlands?A. AmsterdamB. RotterdamC. UtrechtD. The HagueA47.The __________ point is the temperature at which a substance changes from solid to liquid.48.Do you have a pet _____ (鸟)?49.The stars are _____ (twinkling/sleeping).50.My birthday is in ___. (April)51. A flamingo gets its pink color from its ______.52.What is the capital of Jamaica?A. KingstonB. Montego BayC. Ocho RiosD. NegrilA53.The candy is ______ (sweet) and tasty.54.The ______ of plants can vary greatly depending on the species. (植物的高度根据种类可能有很大差异。

东师《课程与教学概论（高起专）》2015春第七次在线作业一、单选题（共6 道试题，共15 分。

）V 1. （）的课程设计注重儿童自身的兴趣需要。

A. 社会改造主义B. 人本主义C. 进步主义D. 结构主义满分：2.5 分2. （）提出课程内容的选择要遵循9个原则A. 泰勒B. 巴恩斯C. 窦尔D. 塔巴满分：2.5 分3. （）于学科课程相对。

A. 显性课程B. 隐性课程C. 选修课程D. 活动课程满分：2.5 分4. 90年代以前，我国中小学教材是由A. 各学校自己开、发编写B. 北京教育出版社统一编写C. 人民教育出版社统一编写D. 教育科学出版社统一编写满分：2.5 分5. （）认为，任何学科都可以用某种形式教给任何年龄阶段的任何人。

A. 布鲁姆B. 布鲁纳C. 杜威D. 赫尔巴特满分：2.5 分6. ()是现代学习方式的核心特征A. 独立性B. 主动性C. 合作性D. 探究性满分：2.5 分二、多选题（共4 道试题，共10 分。

）V 1. 表现性评价的任务主要有（）类型A. 结构性表现任务B. 口头表达C. 创作作品D. 书面表达满分：2.5 分2. 《基础教育课程改革纲要（试行）》中提出的具体的目标有：A. 强调学生主动学习。

B. 开设学科课程的同时强调课程的整合，设置综合课程。

C. 加强课程内容与学生生活以及现代社会和科技发展的联系。

D. 注重学习的动手能力和创新意识。

E. 发挥评价促进学生发展、教师提高和改进教学实践的功能。

F. 实行国家、地方、学校三级课程管理。

满分：2.5 分3. 博比特认为课程开发的具体过程包括A. 课程目标的选择B. 具体活动或具体工作的分析C. 人类经验的分析D. 课程目标获得E. 教育计划的制定满分：2.5 分4. 传统教学论中较有影响的人物有A. 夸美纽斯B. 赞科夫C. 赫尔巴特D. 凯洛夫满分：2.5 分三、判断题（共30 道试题，共75 分。

）V 1. “给予每个人做领导人的机会” 不是开启教师间的正向互动的方式。

数学试卷（七）班级 姓名 分数一．选择题（每题3分）1.下列图形中不一定是平面图形的是（）A 三角形B 平行四边形C 梯形D 四条线段首尾相连形成的四边形2 .三条平行直线最多能确定平面（）A 一个B 两个C 三个D 四个3. 异面直线指的是( )A 不同在一个平面内的两条直线B 分别在某两个平面内的两条直线C 既不平行又不相交的两条直线D 平面内的一条直线和平面外的一条直线4. 一条直线与另一条直线平行，它与经过另一条直线的平面的位置关系是( )A 平行B 相交C 平行或在平面内D 在平面内5. 平行同一个平面的两条直线的位置关系是（ ）A. 平行B. 相交C. 异面D. 以上都有可能6.在正方体中，棱AD 与CC 1所在直线所成的角是（ ）A. 30°B. 45°C. 60°D. 90°7.下列图形中不一定是平面图形的是（ ）A. 三角形 B ．四边形 C ．梯形 D ．圆8.在正方体1111ABCD A B C D -中，棱11A D 与1CC 所在直线所成的角是（ ）A. 30°B. 45°C. 60°D. 90°9.对于平面α和共面的直线m 、n ，下列命题中真命题是（ ）①若m ∥a ，m ∥n ，则n ∥a ②若m ∥α，n ∥α，则m ∥n③若m ⊂α，n ∥α，则m ∥n ④若m 、n 与α所成的角相等，则m ∥n10.下列条件中，不能判断两个平面平行的是 （填序号）.A 一个平面内的一条直线平行于另一个平面B 一个平面内的两条直线平行于另一个平面C 一个平面内有无数条直线平行于另一个平面D 一个平面内任何一条直线都平行于另一个平面二．填空题（每题3分）11.正方体中，直线AD 与B 1C 是 直线，直线AD 与B 1C 所成的角为 ；12. 正方体中 直线B 1B 与D 1D 是 直线 ，直线B 1B 与D 1D 所成的角为 ；13.点A 到平面α的垂线段2AB cm =，斜线段4AC cm =，那么斜线AC 与平面α的夹角为14.两条异面直线所成角的范围15.下列四个命题:①三点确定一个平面;①一条直线和一个点确定一个平面;①若四点不共面,则每三点一定不共线;①三条平行直线确定三个平面.其中正确的有16.列说法正确的是______①①一个平面的面积是2cm 2；①平面内的一条线段把这个平面分成两部分；①平面α和平面β可能有且只有一个公共点；①四边形一定是平面图形；①同一平面内不重合的两条直线最多有一个交点；①如果一条直线a 在平面α外，那么直线a 与平面α没有公共点．17．空间不共线的四点，可能确定___________个平面．18.下列命题中，正确命题的是 .①若直线l 上有无数个点不在平面α内，则l ∥α;②若直线l 与平面α平行，则l 与平面α内的任意一条直线都平行；③如果两条平行直线中的一条直线与一个平面平行，那么另一条直线也与这个平面平行；④若直线l 与平面α平行，则l 与平面α内的任意一条直线都没有公共点.三．解答题19.在棱长为1的正方体1111ABCD A B C D -中，求：1D B 与面AC 所成角的余弦值（8分）20. 在棱长为1的正方体1111ABCD A B C D -中，求：异面直线1AD 与1A B 的夹角（8分）21. 在长方体ABCD −A 1B 1C 1D 1中，AB =6,BC =8,BB 1=10,求对角线DB 1与平面ABCD 所成的角。

惠州“PEP”2024年11版小学四年级英语第五单元暑期作业考试时间:90分钟（总分:100）考试人：_________题号一二三总分得分评级介绍：本次试卷涵盖了PEP四年级第五单元的核心内容，难度适中，重点关注词汇运用和句型结构，旨在巩固学生的英语基础知识和语言表达能力。

一、(选择题)总分:45分(2分/题)1、读短文，选词填空。

2、What do we call the last day of the year?A, New Year's EveB, ChristmasC, ThanksgivingD, Halloween3、What is the English translation of "山"?A, HillB, ValleyC, MountainD, Forest4、What is the main language spoken in the United States?A, SpanishB, EnglishC, French5、What is the English meaning of "空调"?A, FanB, HeaterC, Air conditionerD, Refrigerator6、What do you call a book that tells a story?A, NovelB, DictionaryC, EncyclopediaD, Atlas7、The cat is sleeping on the sofa. What is the cat doing?A, EatingB, SleepingC, PlayingD, Running8、What is the opposite of "soft"?A, HardB, SmoothC, RoughD, Tender9、What is the main ingredient in a smoothie?中文解释：奶昔的主要成分是什么？A, FruitB, IceC, Milk10、What is the smallest unit of life?A, AtomB, CellC, MoleculeD, Organ11、What do you call the time when you eat in the evening?A, BreakfastB, LunchC, DinnerD, Snack12、This person is a successful businessman. 这个人是一位成功的商人。

小学上册英语第1单元暑期作业(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.My dad likes to go cycling in the ____ (park).2.The chemical formula for cadmium sulfide is _______.3. Empire was known as the Golden Age of ________ (印度). The Hait4.My favorite dessert is ______ (冰淇淋) topped with fresh ______ (水果).5.I want to _______ (学习) about history.6.My aunt loves __________ (摄影).7.The law of conservation of mass states that mass is neither created nor ______.8. A solar eclipse happens when the ______ passes between the Earth and the sun.9.My ________ (玩具名称) can spin around quickly.10.The owl is a _______ (夜间) hunter.11.The _____ (music/dance) is fun.12.Many plants are ______ (药用) and can help cure illnesses.13.I can ________ my homework alone.14.My favorite color is _____ (green/yellow).15. A group of fish swimming together is called a ______.16.My mom is ______ (cooking) dinner.17.The dog is ______ (playing) with its owner.18.__________ (高分子) are made up of many repeating units.19.What is the capital of Malta?A. VallettaB. MdinaC. GozoD. Rabat答案:A20.We have ______ (很多) plants at home.21.The ancient Mesopotamians created one of the first written _______.22. A butterfly goes through four stages: egg, larva, pupa, and __________.23.The _______ (Lousiana Purchase) doubled the size of the United States in 1803.24.My action _______ can fly high in the sky.25.Some _______ can be very hardy and resilient.26.My brother is a _____ (学生) exploring different subjects.27.What part of the plant absorbs water?A. LeafB. StemC. RootD. Flower答案: C28.The picture is on the ___. (wall)29.The chemical formula for potassium chloride is ______.30.What is the name of the process that causes rocks to break down?A. ErosionB. WeatheringC. SedimentationD. Compaction答案:B31.The puppy is ______ (非常可爱) and fluffy.32. A _______ can be a source of joy and relaxation.33.My favorite subject is _____ (math/science).34.Many celestial events can be predicted using _______ mathematics.35.The city of Bangkok is known for its ________ (寺庙).36.The __________ is a large area known for its volcanoes.37.The _______ (The Space Race) was a competition for supremacy in space exploration.38.The __________ (历史的思维模式) inspires innovation.39.urban agriculture) utilizes city spaces for farming. The ____40.The _____ (土壤类型) can affect plant growth.41.Many animals hibernate during the ______.42.The __________ (生态治理) ensures resource management.43.The process of filtration separates solids from liquids using a ______.44.The ______ helps with the development of bones.45.The sweater is _______ (too) big for me.46. A ____ is often kept as a pet and enjoys being around people.47.The first modern Olympic Games were held in ______ (雅典).48.training session) builds capacity. The ____49.What do we call a series of events that happen in a story?A. PlotB. ThemeC. SettingD. Character答案:A50. A ________ (植物分布) varies by region.51.__________ eat both plants and meat.52. A tarantula can live for several ________________ (年).53.The flamingo is often seen in _________ (湿地).54.The _______ (Mughal Empire) was known for its cultural achievements in India.55.I enjoy learning about history. Discovering how people lived in the past is fascinating. One historical event I found interesting was __________ because__________.56.The __________ (气候) affects how we live.57. A catapult uses tension to launch a ______.58. A process that involves a change in state is called a ______.59.The pizza is _______ (hot) and cheesy.60.The process of fermentation can produce __________ and carbon dioxide.61.The teacher is ______ us a story. (reading)62.The weather is very ________ in summer.63.The boy likes to play ________.64.The __________ is the habitat for polar bears. (北极)65.The _______ (青蛙) is often found near water.66.He is learning to ___. (write)67.What do we call a scientist who studies rocks?A. BiologistB. GeologistC. ChemistD. Physicist答案: B68. A __________ is a substance that increases the concentration of hydrogen ions in solution.69.She is _______ (listening) to music.70.An electric circuit can be open or ______.71.The chemical symbol for radon is _______.72.The park has a _____ (playground/garden).73. A ____(cartogram) represents data through geographic maps.74. A ____ is a playful animal that enjoys chasing after its friends.75.During summer, I like to play with my _________ (水枪) in the pool.76.What do we use to measure time?A. RulerB. ClockC. ScaleD. Tape答案: B77.我的朋友喜欢 _______ (活动). 她觉得这很 _______ (形容词)78.My aunt is very __________ (友好的) and welcoming to everyone.79. A ____ is known for hopping and quick movements.80.My dad is a great __________ (支持者) of my goals.81.The __________ was a significant event in American history for women's rights. (妇女选举权运动)82.Mom calls me her little _______ when I help her cook.83.The dog is ___ (barking/growling).84.The chemical formula for table salt is ______.85.The chemical formula for lithium fluoride is _______.86.The chemical formula for mendelevium chloride is ______.87.My favorite fruit is a ______ (香蕉). It is healthy and very ______ (好吃).88. A __________ is a substance made up of only one type of atom.89.She is _____ (learning/teaching) new words.90.I enjoy taking ______ (旅行) to different countries to learn about their ______ (文化).91. A mineral’s ______ refers to its shiny or dull appearance.92.We visit the _____ (博物馆).93.What do you call a scientist who studies rocks?A. BiologistB. GeologistC. ChemistD. Physicist答案: B94.They are ________ soccer now.95.My brother is a great __________ (运动员).96.I enjoy watching the __________ fall during winter. (雪)97.The chemical formula for silver acetate is _____.98.I like to _____ in the swimming pool. (swim)99.The __________ are a group of islands in the Caribbean. (加勒比群岛)100.The _____ (采摘) of fruits is a fun summer activity.。

第一周第一次作业班级姓名1、有一块金属，质量为11.7kg，体积为1.5dm3，则这块的密度是kg/m3，由此可判断这金属是。

若将这块金属分成四等份，则每一块的密度是kg/m3。

2、有一铝块的重是132.3N,它的体积为5×10-3m3，则这块铝块的质量是kg，密度是kg/m3。

3、有一根质量均匀的金属棒，其长度为4m，横截面积为2cm2,质量为6.24kg，这种金属的密度是kg/m3；如果将这金属棒从中间截断后，每段金属棒的密度是kg/m3。

4、由同种物质制成的两个实心小球，则下列说法错的是（）A、质量大的，体积也大B、质量小的，体积也小C、质量小的，体积大D、质量相等的，体积也相等5、有A、B两物体，A的质量为10kg，B的质量为5kg，那么（）A、A的密度大B、B的密度大C、A、B的密度同样大D、不能判断6、甲、乙两金属，密度之比为2∶5，质量之比为1∶2，那么，甲的体积是乙的体积的（）A、1.25倍B、5倍C、0.8倍D、0.2倍7、质量54kg的铝球，体积为30cm3,那么它空心部分的体积是（）A、10dm3B、10cm3C、5dm3D、5cm38、甲、乙两种液体的质量之比为1∶2，密度之比为5∶4，则体积之比为（）A、5∶2B、2∶5C、1∶2D、2∶1第一周第二次作业班级姓名1、如果测定一个形状不规则的密度，应该用测量它的体积，用测量它的质量，计算物体的密度的公式是。

2、一只铜盆的质量是540g，一只铜壶的质量是370g，一只铜勺的质量是30g，则它们的质量之比是；它们的体积之比是；它们的密度之比是。

3、一种油的体积是1.2dm3，质量是0.96kg，则它的密度是，2m3这种油的质量是kg.4、两个不同材料制成的体积相同的实心球A和B，在天平右盘中放两个A球，在左盘中放三个B球，天平刚好平衡，则（）A、A球和B球质量之比为1∶1B、A球和B球质量之比为2∶3C、A球和B球密度之比为3∶2D、A球和B球密度之比不能确定5、一只瓶子能装1kg水，这个瓶子一定能装下1kg的（）A、酒精B、汽油C、硫酸D、以上液体都装不下6、一个质量为0.3kg的水壶，装满水后总质量为0.8kg，装满另一种液体时总质量为0.7kg，则这种液体的密度是（）A、1.4×103kg/m3B、0.875×103kg/m3C、0.8 kg/m3D、0.8×103kg/m37、实验室有下列四种量筒，分别标有最大量度范围和最小刻度，要一次较准确地量出100g密度为0.8×103kg/m3的酒精，则应选用的量筒是（）A、500ml,10mlB、100ml,2mlC、250ml,5mlD、50ml,2ml8．小明同学在课外活动课中，想测出一个油罐内油的质量，已经知道这个油罐的容积是50 m3，他取出一些样品，测出20 cm3这种油的质量是16 g，请你帮他计算出这罐油的质量第二周第三次作业班级姓名1、在“测定物质的密度”实验中，用天平测某金属的质量，天平平衡时，右盘砝码为100g、50g、5g、1g各一个，原来量筒的水面位置如下图甲所示，将金属块全部浸入水中后，水面位置如图乙所示，（量筒刻度单位是cm3）。

《中医妇科学B》第七次B型题1. 女患者，经前、经期小腹冷痛拒按，得热痛减，经血量少，色黯有块，畏寒肢冷，面色青白，舌黯，苔白，脉沉紧。

治疗应首选：B.少腹逐瘀汤 [1分]2. 女患者，经后小腹隐隐作痛，喜按，月经量少，色淡质稀，头晕耳鸣，腰膝痠软，小便清长，面色晦暗，舌淡苔白，脉沉细。

治疗应首选：D.调肝汤 [1分]3. 妊娠12周内，胚胎自然殒堕者，称为：A.堕胎 [1分]4. 妊娠期间，出现以小腹疼痛为主证者，称为：E.胞阻 [1分]5. 终生不来月经而能受孕者称：C.暗经 [1分]6. 身体无病月经一年一行者称： E.避年[1分]7. 肾阳虚型带下过多的治法是：B.温肾培元，固涩止带 [1分]8. 脾肾阳虚经行浮肿的治法是：D.温肾化气，健脾利水 [1分]9. 问诊应注意问带下的：A.量、色、质、味 [1分]10. 问诊应注意问月经的： C.期、量、色、质[1分]11. 与热邪有关的病证是：A.崩漏 [1分]12. 与湿热有关的病证是：C.带下病 [1分]13. 治疗脾虚子满的首选方是：D.鲤鱼汤 [1分]14. 治疗脾虚子肿的首选方是：A.白术散 [1分]15. 经行小腹绞痛，得热痛减者，多属于：D.实寒证 [1分]16. 经行小腹隐痛，喜暖喜按者，多属于：C.虚寒证 [1分]17. 治疗肾气虚型闭经首选方是：C.加减苁蓉菟丝子丸 [1分]18. 治疗肾气虚型痛经首选方是：B.调肝汤 [1分]19. 妊娠早期，呕吐清涎，头晕体倦，不思饮食。

治宜：A.健脾和胃，降逆止呕 [1分]20. 妊娠早期，呕吐酸苦水，胸胁满闷，口苦咽干。

治宜： B.清肝和胃，降逆止呕 [1分]21. 带下量多，色淡黄，质稀薄，无臭气。

多属：A.脾阳虚证 [1分]22. 带下量多，色白清冷，质稀如水，无臭气。

多属： B.肾阳虚证 [1分]23. 二仙汤适用于经断前后诸证哪个证型？C.肾阴阳两虚证 [1分]24. 左归丸适用于经断前后诸证哪个证型？ B.肾阴虚证 [1分]25. 恶阻气阴两虚证的辨证要点是： E.呕吐带血样物 [1分]26. 恶阻脾胃虚弱证的辨证要点是：C.呕吐酸苦水 [1分]27. 女患者，每于经前、经期肢体肿胀，按之随手而起，胸闷胁胀，月经量少，色黯红，有血块，舌黯，苔薄白，脉弦，其治疗应首选: D.八物汤[1分]28. 女患者，每于经前出现乳房胀痛，拒按，伴烦躁易怒，经行不畅，色暗红有血块，舌红,苔薄白，脉弦。

博士课程专题论文易经与领导力专题论文作者姓名：曹义胜指导教师：王伟教授学科/专业：工商管理（DBA）所在学院：马克思主义学院提交日期： 2015年1月6日12月4日一天：《易经与领导力》，由华北电力大学人文与社会科学学院副院长王伟副教授主讲；第七次作业（公共管理专业、工商管理专业)：易经与领导力专题论文根据易经与领导力研究理论，联系实际写一篇3000字以上的专题论文，题目自拟。

请于下次上课前提交。

凡专题论文作业均将以百分制成绩记入学员的学习成绩档案。

王伟教授的课件：/UpLoadFiles/wangwei_kejian001.rar易经与财务领导学研究曹义胜摘要：通过学习研究《易经与流领导力》相关理论，结合企业财务管理工作实践，分别从外汇风险及管理的基本涵义、分类、外汇风险规避常用手段、企业外汇规避方法分析与控制等方面，探研外贸进出口中小企业外汇风险管控，希望在自己学习研究外贸进出口企业外汇风险管控的同时，此文能对广大外贸进出口中小企业经营者有所参考与帮助。

本文分两大部分，第一部分外汇风险基础理论学习与研究；第二部分中小企业外汇风险分析与管控应用研究。

关键词：外汇风险，分析，管控引言我国人民币汇率实行以市场供求为基础的、有管理的浮动汇率制度。

人民币汇率形成机制改革之后,人民币汇率的波动幅度逐步加大,我国涉及对外贸易的企业面临巨大的外汇风险,加强外汇风险管控显得尤为紧迫和重要,而企业在过去的固定汇率制度下对外汇风险的认识不足,特别是在外汇风险的度量和对外汇风险规避策略和方法选择上,国内企业主要停留在通过一些传统的方法来减小外汇风险暴露的层面上,如改变企业经营模式、调整价格、收付改期、货币选择等方法,对汇率市场的波动认识不够,缺乏利用金融衍生工具进行外汇风险规避的经验。

针对这一情况,本文通过学习研究汇率风险相关理论，结合工作实践，对中小企业外汇风险管控进行了系统的分析与研究。

希望对我国目前一些外贸进出口中小企业进行有效外汇风险控制具有一定的参考意义。

第一、二章作业(1)1、原子间的金属键的特点如何？2、 晶体具有什么特征，其与非晶体的的区别？3、空间点阵、晶胞、晶体结构有何区别？4、分别作图表示立方晶系中的晶面和晶向：(123)（012）、（421）、[121]、[120]、[231]；第二章作业（2）1、为什么密排六方结构不能称为一种空间点阵？2、请标出六方晶系的晶面、晶向的密勒指数 、（3）。

3、常温下的铝、铁的晶体结构分别是什么？分别说出：一个晶胞包含多少个原子？致密度是多少？原子半径与点阵常数的关系是什么？配位数是多少？最密排面与最密排方向？铝的最密排面的原子的堆垛方式为什么？4、立方晶体中（110）和（211）面同属于什么晶带？5、已知纯钛有两种同素异构体：低温稳定的密排六方结构α-Ti 和高温稳定的体心立方结构β-Ti ，其同素异构转变温度为882.5℃。

计算纯钛在室温（20℃）和900℃时晶体中（112）和（001）的晶面间距（已知nm a 2951.020=℃α，nm 4679.0c 20=℃α，nm a 3307.0900=℃β。

第二章作业（3）1、什么是间隙固溶体?形成间隙固溶体有何条件?2、 为什么碳在γ-Fe 中的溶解度大于在α-Fe 中的溶解度？3、分析比较间隙相和间隙化合物在形成条件、晶体结构方面的差别?4、固溶体有何性质？5、常见的金属化合物有哪几类？它们各有何特点？Mg2Si 、Fe3C 、VC 、等是哪种类型的化合物？第三、四章作业（4）1、位错反应的条件是什么？（4分）判断下列位错反应能否进行？（6分） （ 1 ）（ 2 ）2.位错运动有几种机制，分别简述其过程。

（10分）3.请阐述位错增殖理论。

（10分）4、按结构特点分类，相界面有哪几种类型？简述各个类型的特征。

（10分）5、试从晶界的结构特征和能量特征分析晶界的特点。

（15分）6、为什么点缺陷在热力学上是稳定的，而位错则是不平衡的晶体缺陷？（10分）7、什么是扭折与割阶？什么是大角度结晶、小角度晶界？小角度晶界有哪几种类型？（10分）8、写出菲克第一定律与菲克第二定律的表示式，并说明其中各个量的含义。

小学上册英语第3单元暑期作业(含答案)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 My mom loves __________ (参与当地事务).2 The _____ is the force that attracts objects toward one another.3 I want to _____ (play/learn) soccer.4 The _____ (蘑菇) is a type of fungus, not a plant.5 She is ___ her homework. (doing)6 The chemical formula for ammonium thiocyanate is _______.7 A solution that can conduct electricity is called a _______ electrolyte.8 The chemical symbol for titanium is ______.9 The ant works together in a _______ (群体).10 What is the term for a baby deer?A. CalfB. FawnC. KidD. Cub答案:B11 How many legs does a spider have?A. SixB. EightC. TenD. Four答案:B12 The chameleon can change its _______ (颜色).13 What is the color of a ripe banana?A. GreenB. YellowC. BrownD. Red14 I like to play with my toy ________ (玩具名称) at the library.15 The movie was very ________.16 Maria is a ______. She enjoys helping others.17 A chemical reaction can result in a temperature ______.18 The __________ is a famous city known for its music. (维也纳)19 I have a ________ (拼图玩具) that features my favorite cartoon character.20 What do you call a place where you can see many animals?A. ZooB. FarmC. ParkD. Garden答案:A21 We are making ________ (沙拉) for lunch.22 The _______ (猫) pounces on its toy.23 My friend’s name is ____ and he/she is ____.24 My favorite musician is _______ (名字). 她的音乐风格很 _______ (形容词).25 A solute is the substance that is _____ in a solution.26 I like to _______ (拍摄视频) of my adventures.27 What is a common pet that barks?A. CatB. DogC. HamsterD. Fish答案: B28 In a battery, chemical energy is converted into ________ energy.29 My cat likes to sit in the _______ (阳光).30 Which of these is a type of bird?A. SalmonB. SparrowC. FrogD. Lizard答案: B31 What is the name of the famous bridge in San Francisco?A. Brooklyn BridgeB. Golden Gate BridgeC. Tower BridgeD. Sydney Harbour Bridge答案:B32 When I help others, I feel ______ (满足). It’s important to be kind and ______ (乐于助人).33 My dad encourages me to follow my __________ (兴趣).34 Which of these is a primary color?A. PurpleB. GreenC. RedD. Orange35 The first telephone was invented by ________ Bell.36 The ______ teaches us about philosophy.37 What is 2 + 2?A. 3B. 4C. 5D. 6答案: B38 My aunt has a wonderful __________ (个性).39 The _____ (狮子) is a powerful predator.40 Carta was signed in __________ (1215). The Magn41 A reaction that produces a solid is called a ______ reaction.42 I bring a towel to dry off after swimming in the ______ (河).43 I enjoy drawing ______ during art class.44 How many planets are in the Milky Way galaxy?A. 8B. Over 100 billionC. 10D. 1245 What is the term for a plant that lives for more than two years?A. AnnualB. BiennialC. PerennialD. Seasonal答案:C46 How many months are there in a year?A. 10B. 12C. 11D. 9答案:B47 The famous singer I like is _______ (名字). 她的歌很 _______ (形容词).48 The colorful part of a flower that attracts bees is called a ______.49 What is the capital city of Canada?A. TorontoB. OttawaC. VancouverD. Montreal答案:B50 The ______ (石头) pathway leads to the garden.51 I have a ________ that changes colors.52 What do we call the time it takes for the Earth to make one complete revolution around the sun?A. YearC. DayD. Hour答案: A53 The _______ (The Cold War) was a prolonged geopolitical conflict.54 A ______ (植物的适应性) is crucial for ecosystem balance.55 We had ______ (fun) at the museum.56 Which of these is a type of cloud?A. CumulusB. MountainC. ValleyD. Desert答案:A57 A chemical reaction can result in the formation of new ______.58 What do we call a series of events that occur in a story?A. PlotB. ThemeC. CharacterD. Setting答案: A59 I have a _______ (subscription) to the magazine.60 When I go to the movies, I like to bring my favorite ________ (玩偶) along.61 What is the term for a baby horse?A. CalfB. FoalD. Cub答案:B62 A __________ (电离) occurs when a substance breaks into ions in solution.63 What do we call the main character in a story?A. ProtagonistB. AntagonistC. HeroD. Villain答案:A64 The __________ (历史的教育角色) cultivate understanding.65 I enjoy playing with my _________ (飞行器玩具) during the summer.66 The tree is very ___. (tall)67 The ancient Egyptians had a rich tradition of ________ (文化).68 What do you call the act of putting something away in a safe place?A. StoringB. HidingC. KeepingD. Securing答案: A69 The puppy is _______ (调皮) and loves to chew on shoes.70 The __________ is a region known for its community services.71 The _____ (气候适应) is crucial for plant survival.72 The __________ (历史的深远影响) shapes our lives.73 What do we call the area of land surrounded by water?A. IslandB. PeninsulaC. LakeD. River74 What is the main ingredient in guacamole?A. AvocadoB. TomatoC. PepperD. Onion75 The __________ is a small island nation in the Indian Ocean. (马尔代夫)76 The _____ (piano) is out of tune.77 The ______ is a type of reptile.78 My brother is always ready to __________ (帮助他人).79 My dog loves to dig in the ______ (沙子).80 A mixture of two or more metals is called _______.81 A parakeet can learn to _______ (说话).82 (93) is known for its cultural diversity. The ____83 The ______ teaches us about history.84 What is the color of grass?A. BlueB. YellowC. GreenD. Red答案：C85 The _______ of a balloon can be affected by altitude.86 What is the capital of the United States?A. New YorkB. Los AngelesC. Washington,D.C.D. Chicago答案: C. Washington, D.C.87 The owl is a nocturnal ______ (动物).88 Lizards can change their ______ (颜色).89 The concept of clean energy emphasizes the importance of sustainable energy ______.90 The puppy is _______ (sleeping) on my lap.91 What is 15 + 5?A. 20B. 25C. 30D. 3592 An octopus has ______ tentacles.93 Geothermal energy is produced from the heat of the ______.94 What do you call a collection of plants grown for display?A. GardenB. NurseryC. GreenhouseD. Arboretum答案: D95 The road is _______ (bumpy).96 The __________ (南美洲) is home to the Amazon Rainforest.97 I want to learn how to ________ (表演) on stage.98 _____ (草本植物) are used in many recipes.99 The park is ______ (close) to my house.100 The ________ is a special plant that blooms brightly.。