Homework 1
Homework 1 (Chapter 1)
1.Has the inflation rate in the United States increased or decreased in the past few years? What
about interest rates? And what are the performances of these two figures in China? Please find the data and answer this question by graphing them.
2.If history repeats itself and we see a decline in the rate of money growth, what might you
expect to happen to a. real output? b. the inflation rate? c. interest rate?
3.When was the most recent recession in US?
4.When interest rates fall, how might you change your economic behavior?
5.Can you think of any financial innovation in the past ten years that has affected you or your
family personally? Has it made you better off or worse off? Why?
4 I may increase my consumption and decrease the savings because when the interest rates fall it will cost less to finance and also I will earn less by saving.
5 Chinese Government's Consumer Electronics Subsidy Program
old-for-new service
so we can replace our old electronic products with a lower price.
It made us better .
2all fall
https://www.wendangku.net/doc/ac7983515.html,/releases/H15
上海建筑工程取费费率
附件1： 最高投标限价相关取费费率 一、企业管理费和利润 企业管理费和利润以分部分项工程、单项措施和专业暂估价的人工费为基数，乘以相应费率（见表1）。其中，专业暂估价中的人工费按专业暂估价的20%计算。 表1 各专业工程企业管理费和利润费率表 注：市政管网工程（给水、燃气管道工程）费率为37%。 二、措施项目中的总价措施费 （一）安全防护、文明施工费
房屋建筑与装饰、设备安装、市政、城市轨道交通、民防工程，按照原上海市城乡建设和交通委员会《关于印发〈上海市建设工程安全防护、文明施工措施费用管理暂行规定〉的通知》（沪建交[2006]445号）相关规定施行。市政管网工程参照排水管道工程；房屋修缮工程参照民用建筑（居住建筑多层）；园林绿化工程参照民防工程（15000m2以上）；仿古建筑工程参照民用建筑（居住建筑多层）。 （二）其他措施项目费 其他措施项目费以分部分项工程费为基数，乘以相应费率（见表2）。主要包括：夜间施工，非夜间施工照明，二次搬运，冬雨季施工，地上、地下设施、建筑物的临时保护设施（施工场地内）和已完工程及设备保护等内容。 表2 各专业工程其他措施项目费费率表
注：市政管网工程（给水、燃气管道工程）费率为3.5%。 三、规费 （一）社会保险费 社会保险费以分部分项工程、单项措施和专业暂估价的人工费为基数，乘以相应费率（见表3）。其中，专业暂估价中的人工费按专业暂估价的20%计算；社会保险费费率中管理人员部分为5.55%，其余为生产工人部分。 表3 社会保险费费率表
注：市政管网工程（给水、燃气管道工程）费率为31.03%。 （二）住房公积金 住房公积金以分部分项工程、单项措施和专业暂估价的人工费为基数，乘以相应费率（见表4）。其中，专业暂估价中的人工费按专业暂估价的20%计算。 表4 住房公积金费率表
homework1
《计算机系统基础》Homework HW1：数据的表示 实验目的：熟悉数值数据在计算机内部的表示方式，掌握相关的处理语句。 实验报告要求： 1.说明你做实验的过程（重要步骤用屏幕截图表示）。 2.提交源程序。 3.分析或回答问题。 完成下列实验，提交实验报告： 1.下述两个结构所占存储空间多大？结构中各分量所在位置相对于结构起始位置的偏移 量是什么？要求编写程序以验证你的答案。若使用#pragma pack(2)语句，则结果又如何？ struct test1 { char x2[3]; short x3[2]; int x1; long long x4; }; struct test2 { char x2[3]; short x3[2]; int x1; long long x4; }__attribute__((aligned(8))); 2.“-2 < 2”和“-2 < 2u”的结果一样吗？为什么？ 3.运行下图中的程序代码，并对程序输出结果进行分析。
4.运行下列代码，并对输出结果进行分析。 #include
新编大学英语 第二册 unit1 课文翻译
新编大学英语（第二版）第一册阅读文参考 译文 Unit One 课内阅读文参考译文 以生命相赠 1 炸弹落在了这个小村庄里。在可怕的越南战争期间，谁也不知道这些炸弹要轰炸什么目标，而他们却落在了一所有传教士们办的小孤儿院内。 2 传教士和一两个孩子已经丧生，还有几个孩子受了伤，其中有一个小女孩，8岁左右，她的双腿被炸伤。 3 几小时后，医疗救援小组到了。救援小组由一名年轻的美国海军医生和一名同样年轻的海军护士组成。他们很快发现有个小女孩伤势严重。如果不立即采取行动，显然她就会因失血过多和休克而死亡。 4 他们明白必须给小女孩输血，但是他们的医药用品很有限，没有血浆，因此需要相配血型的血。快速的血型测定显示两名美国人的血型都不合适，而几个没有受伤的孤儿却有相配的血型。 5 这位医生会讲一点越南语，忽视会讲一点法语，但只有中学的法语水平。孩子们不会说英语，只会说一点法语。医生和护士用少得可怜的一点共同语言，结合大量的手势，努力向这些受惊吓的孩子们解释说，除非他们能输一些血给自己的小伙伴，否则她将必死无疑。接着问他们是否有人愿意献血来救小女孩。 6 对医生和护士的请求，孩子们（只是）瞪大眼睛，一声不吭。此时小病人生命垂危。然而，只有这些受惊吓的孩子中有人自愿献血，他们才能够得到血。过了好一会儿，一只小手慢慢地举了起来，然后垂了下去，一会儿又举了起来。 7 “噢，谢谢，”护士用法语说。“你叫什么名字？” 8 “兴，”小男孩回答道。 9 兴很快被抱到一张床上，手臂用酒精消毒后，针就扎了进去。在整个过程中，兴僵直地躺着，没有出声。 10 过了一会儿，他发出了一声长长的抽泣，但立即用那只可以活动的手捂住了自己的脸。 11 “兴，疼吗？”医生问。 12 兴默默地摇了摇头，但一会儿忍不住又抽泣起来，并又一次试图掩饰自己的哭声。医生又问是不是插在手臂上的针弄疼了他，兴又摇了摇头。 13 但现在，偶尔的抽泣变成了持续无声的哭泣。他紧紧地闭着眼睛，用拳头堵住嘴想竭力忍住哭泣。 14 现在医疗小组非常担忧，因为针不该使他们的小输血者一直感到疼痛。显然出了问题。恰好这时，一名越南护士前来帮忙。看到小男孩在哭，她用越南话很快地和他说话。听了小男孩的回答后，又立即回答他。护士一边说，一边俯身轻轻拍着小男孩的头，她的声音亲切柔和。 15 一会儿，小男孩不再哭了，他睁开眼睛，用询问的目光看着越南护士。护士点了点头，小男孩的脸上马上露出了宽慰的神色。
市政工程取费费率
市政工程取费费率 一、市政工程施工技术措施费 市政工程施工技术措施费按市政工程计价规范和市政工程消耗量定额规定执行。二、 四、
五、
二、工程类别划分说明 (一)土石方工程 附属于一个单位工程内挖或填方量不超过5000m2的土石方工程，按土石方工程类别执行；单独编制工程量清单计价的或一个单位工程内挖方或填方分别超过5000m2的土石方T程执行专业土石方工程。 (二)道路工程 道路工程按道路交通功能分类：
1．高速干道：城市道路设有中央分隔带，具有四条以上车道，全部或部分采用立体交叉与控制出入，供车辆高速行驶的道路。 2．主干道：在城市道路网中起骨架作用的道路。 3．次干道：在城市道路网中的区域性干路，与主干路相连接，构成完整的城市干路系统。 4．支路：在城市道路网中的干路以外联系次干路或供区域内部使用的道路。 5．街道：在城市范围全部或大部分地段两侧建有各式建筑物，设有人行道和各种市政公用设施的道路。 6．居民(厂)区道路：以住宅(厂房)建筑为主体的区域内道路。 (三)桥涵工程 1．单独桥涵工程按桥涵分类，附属于道路工程的桥涵，按道路工程分类。 2．单独立交桥工程按立交桥层数进行分类；与高架路相连的立交桥，执行立交桥类别。 (四)隧道工程 隧道工程按隧道类型及隧道截面宽度进行分类。 隧道截面宽度指隧道内截面的净宽度。 (五)河道防洪及护岸工程 河道防洪及护岸工程按单独排洪工程、单独护岸、护坡及土堤工程分类。 1．单独防洪工程包括明渠、暗渠及截洪沟。 2．单独护岸护坡包括抛石、石笼、砌护底、护脚、台阶以及附属于本类别的土方附属工程等。 (六)给排水工程 给排水工程按管径大小分类。 1．顶管工程包括挤压顶进。 2．在一个给水或排水工程中有两种及其以上不同管径时，按最大管径取定类别。 3．给、排水管道包括附属于本类别的挖土和管道附属构筑物及设备安装。 (七)燃气、供热工程 燃气工程按管径大小分类。 供热工程按供热管径大小分类。 1．一个燃气或供热管道工程中，有两种及其以上不同管外径管道时，按最大管外径取定类别。 2．燃气、供热管道包括管道挖土和管道附属构筑物。 (八)其他有关说明 1．某专业工程有多种情况的，符合其中一种情况，即为该类工程。 2．除另有说明者外，多个专业工程一同发包时，按专业工程类别最高者作为该工程的类别。 3．在同一单位工程中，有两种以上不同外径的管道时，其工程类别应按工作量最大的管道外径取定。 4．道路或桥涵工程附属的人行道、挡土墙、护坡、围墙等工程按道路或桥涵工程分类。 5．单独附属工程按相应主体工程的三类取费标准计取。 6．与其他专业工程一同发包的路灯或交通设施工程要单独划分工程类别。 7．交通设施工程包括交通标志、标线、信号灯、交通监控工程等，一律按二类取费标准计取。
Homework-1
Homework #1 Due date 2008/10/17 Homework should be written on A4 paper. 1.Why is there no base-centered cubic lattice in the fourteen crystal (Bravais) lattices? 2.Show the direction of the plane intersection. (a)(110) and (111) planes in cubic structure. (b)(110) and (101) planes in cubic structure. (c)(001) and (123) planes in cubic structure. (d)(0001) and (10-11) planes in HCP structure (e)(10-10) and (11-20) planes in HCP structure 3.Aluminum has the FCC structure. The lattice parameter for aluminum is 0.404 nm. The atomic weight of aluminum is 26.98. Calculate the density of aluminum. 4.For three BCC metals, tungsten, molybdenum, and iron, compute the elastic moduli in the <100> and <111> directions. Compare the anisotropy in these three metals. 5.For polycrystalline copper, E = 130 GPa, G = 48 GPa, υ = 0.34. A copper specimen is subjected to elastic stresses represented by the matrix Calculate the corresponding strains. 6. A material is subjected to the following state of stress: σ11 = 350 MPa, σ12 = 70 MPa, σ22 = 210 MPa. Using the Mohr circle construction, calculate (a) the principal stresses, and (b) the maximum shear stress, as well as their orientation.
(完整word版)初一(1)homework趣味英语
让更多的孩子得到更好的教育 Homework A. Fill in the blanks with the correct form. Work, close, look, have, teacher, pen, eat, China, play, climb 1.This is our ___________ desk. Ours are over there. 2.Bill has three _____________. One is new and the other two are old. 3.His uncle _____________ very young but he is over forty. 4.Let's ______________ basketball after class. 5.Look! The cats are _______________ up the trees. 6.The shop isn't open. It's ______________. 7.My brother _______________ some new picture books. 8.In our classroom there is a large map of _______________. 9.Mum, please give me something to ______________. I'm very hungry. 10.Does Mr Green like _______________ in this Chinese school? B. Complete the following sentences. 11.I live with my family in a ________ (wood) house. 12.Look! The bus ________ (come). 13.Let's________(try) the Chinese restaurant in Star Shopping Mall. 14.John sometimes goes ________ (swim) in summer. 15.Three men in police uniform ran out of the ________ (build). You’ve got points in total 2013.07.05 让更多的孩子得到更好的教育
新视野大学英语第一册Unit 1课文翻译
新视野大学英语第一册Unit 1课文翻译 学习外语是我一生中最艰苦也是最有意义的经历之一。 虽然时常遭遇挫折，但却非常有价值。 我学外语的经历始于初中的第一堂英语课。 老师很慈祥耐心，时常表扬学生。 由于这种积极的教学方法，我踊跃回答各种问题，从不怕答错。 两年中，我的成绩一直名列前茅。 到了高中后，我渴望继续学习英语。然而，高中时的经历与以前大不相同。 以前，老师对所有的学生都很耐心，而新老师则总是惩罚答错的学生。 每当有谁回答错了，她就会用长教鞭指着我们，上下挥舞大喊：“错！错！错！” 没有多久，我便不再渴望回答问题了。 我不仅失去了回答问题的乐趣，而且根本就不想再用英语说半个字。 好在这种情况没持续多久。 到了大学，我了解到所有学生必须上英语课。 与高中老师不同，大学英语老师非常耐心和蔼，而且从来不带教鞭！ 不过情况却远不尽如人意。 由于班大，每堂课能轮到我回答的问题寥寥无几。 上了几周课后，我还发现许多同学的英语说得比我要好得多。 我开始产生一种畏惧感。 虽然原因与高中时不同，但我却又一次不敢开口了。 看来我的英语水平要永远停步不前了。 直到几年后我有机会参加远程英语课程，情况才有所改善。 这种课程的媒介是一台电脑、一条电话线和一个调制解调器。 我很快配齐了必要的设备并跟一个朋友学会了电脑操作技术，于是我每周用5到7天在网上的虚拟课堂里学习英语。 网上学习并不比普通的课堂学习容易。 它需要花许多的时间，需要学习者专心自律，以跟上课程进度。 我尽力达到课程的最低要求，并按时完成作业。 我随时随地都在学习。 不管去哪里，我都随身携带一本袖珍字典和笔记本，笔记本上记着我遇到的生词。 我学习中出过许多错，有时是令人尴尬的错误。 有时我会因挫折而哭泣，有时甚至想放弃。 但我从未因别的同学英语说得比我快而感到畏惧，因为在电脑屏幕上作出回答之前，我可以根据自己的需要花时间去琢磨自己的想法。 突然有一天我发现自己什么都懂了，更重要的是，我说起英语来灵活自如。 尽管我还是常常出错，还有很多东西要学，但我已尝到了刻苦学习的甜头。 学习外语对我来说是非常艰辛的经历，但它又无比珍贵。 它不仅使我懂得了艰苦努力的意义，而且让我了解了不同的文化，让我以一种全新的思维去看待事物。 学习一门外语最令人兴奋的收获是我能与更多的人交流。 与人交谈是我最喜欢的一项活动，新的语言使我能与陌生人交往，参与他们的谈话，并建立新的难以忘怀的友谊。 由于我已能说英语，别人讲英语时我不再茫然不解了。 我能够参与其中，并结交朋友。
homework1
Homework for Solid’s Magnetism 1, Pauli spin susceptibility. The spin susceptibility of a conduction electron gas at absolute zero temperature (T~0) may be discussed by another method. Let n +=n (1+η)/2; n -=n (1-η)/2 be the concentration of spin-up and spin-down electrons. (1) show that in a external magetic field B 0, the total energy of the spin-up band in a free electron gas is ),1(2 1-)(105/30ημηε++=+B n E B Where F n εε10 30=, in terms of Fermi energy F ε in zero magnetic field (B 0=0). Also find a similar expression for E ?. (2) Minimize -++=E E E total with respect to η and solve the equilibrium value of η in the approximation 1<<η. Go on to show the magnetization is F B B n M εμ3/302=. 2，Diamagnetic susceptibility of atom hydrogen. The wave function of the hydrogen atom in its ground state (1s) is 0/2/130)(a r e a --=πψ, where cm 10529.0/8220-?==me a . The charge density is 2 ),,(ψρe z y x -=. According to the statistical interpretation of the wave function, show that for this state 2023a r >=<, and calculate the molar diamagnetic susceptibility of atom hydrogen. 3，Heat capacity of magnons. Use the approximation magnon dispersion relation 2ak =ωto the leading term in the heat capacity of a three-dimensional ferromagnet at low temperature. (k is the wavevector). (Integral: 772.1)333.1(4343)!23(11 2/512/501/2/32/3==?==-∑∑?∑∞=-∞=-∞ ∞=-ππn n n x n x n n dx e x e dx x ) 4，给定三个外观相同的物体：（1）永久磁体；（2）顺磁材料；（3）未磁化的铁磁材料。不用任何外加磁场，可以鉴别它们吗？若可能，请描述方法；若不行，请给出理由。 5，（1）什么是Heisenberg 哈密顿量？（2）它表征铁磁体的什么相互作用？（3）为什么平均场理论不能适用于铁磁体的低温态？ 6，碱金属Na ，贵金属Cu ，过渡金属Cr 、Fe 和V ，各属哪类磁性物质？并说明相应类磁性的主要特点。
(完整word版)必修五unit1课文及译文
JOHN SNOW DEFEATS “KING CHOLERA John Snow was a famous doctor in London—so expert, indeed, that he attended Queen Victoria as her personal physician. But he became inspired when he thought about helping ordinary people exposed to cholera. This was the deadly disease of its day. Neither its cause nor its cure was understood. So many thousands of terrified people died every time there was an outbreak. John Snow wanted to face the challenge and solve this problem. He knew that cholera would never be controlled until its cause was found. 约翰·斯洛是伦敦一位著名的医生——他的确医术精湛，因而成为照料维多利亚女王的私人医生。但他一想到要帮助那些得了霍乱的普通百姓时，他就感到很振奋。霍乱在当时是最致命的疾病，人们既不知道它的病源，也不了解它的治疗方法。每次霍乱暴发时，就有大批惊恐的老百姓死去。约翰·斯洛想面对这个挑战，解决这个问题。他知道，在找到病源之前，霍乱疫情是无法控制的。 He became interested in two theories that possibly explained how cholera killed people. The first suggested that cholera multiplied in the air. A cloud of dangerous gas floated around until it found its victims. The second suggested that people absorbed this disease into their bodies with their meals. From the stomach the disease quickly attacked the body and soon the affected person died. 斯洛对霍乱致人死地的两种推测都很感兴趣。一种看法是霍乱病毒在空气中繁殖着，像一股危险的气体到处漂浮，直到找到病毒的受害者为止。第二种看法是人们在吃饭的时候把这种病毒引入体内的。病从胃里发作而迅速殃及全身，患者就会很快地死去。 John Snow suspected that the second theory was correct but he needed evidence. So when another outbreak hit London in 1845, he was ready to begin his enquiry. As the disease spread quickly through poor neighborhoods, he began to gather information. In two particular streets, the cholera outbreak was so severe that more than 500 people died in ten days. He was determined to find out why. 斯洛推测第二种说法是正确的，但他需要证据。因此，在1854 年伦敦再次暴发霍乱的时候，约翰·斯洛着手准备对此进行调研。当霍乱在贫民区迅速蔓延的时候，约翰·斯洛就开始收集资料。他发现特别在两条街道上霍乱流行的很严重，在10 天之内就死去了500 多人。他决心要查明原因。 First he marked on a map the exact places where all the dead people had lived. This gave him a valuable clue about the cause of the disease. Many of the deaths were near the water pump in Broad Street (especially numbers 16,37, 38 and 40) . He also noticed that some houses (such as 20 and 21 Broad Street and 8 and 9 Cambridge Street) had had no deaths. He had not foreseen this, so he made further investigations. He discovered that these people worked in the pub at 7 Cambridge Street. They had been given free beer and so had not drunk the water from the pump. It seemed that the water was to blame. 首先，他在一张地图上标明了所有死者住过的地方。这提供了一条说明霍乱起因的很有价值的线索。许多死者是住在宽街的水泵附近（特别是这条街上16、37、38、40 号）。他发现有些住宅（如宽街上20 号和21 号以及剑桥街上的8 号和9 号）却无人死亡。他以前没预料到这种情况，所有他决定深入调查。他发现，这些人都在剑桥街7 号的酒馆里打工，而酒馆为他们免费提供啤酒喝，因此他们没有喝从宽街水泵抽上来的水。看来水是罪魁祸首。Next, John Snow looked into the source of the water for these two streets. He found that it came from the river polluted by the dirty water from London. He immediately told the astonished people in Broad Street to remove the handle from the pump so that it could not be used. Soon
homework_1
1.一线性连续系统在相同的初始条件下，当输入为f（t）时，全响应为y(t)=2e-t+cos2t， 当输入2f（t）时，全响应y(t)=e-t+2cos(2t)。求在相同的初始条件下，输入为4f（t）时的全响应。 2.已知系统的输入和输出关系为y(t)=|f（t）-f（t-1）|，试判断该系统： （1）是不是线性的？ （2）是不是时不变的？ （3）当输入f（t）如图1所示时，画出响应y(t)的波形。 图 1 3.一个LTI系统，当输入f（t）=ε(t)时，输出为y(t)=e-tε(t)+ε(-1-t)，求该系统对 图2所示输入f（t）时的响应，并概略地画出其波形。 图21、给定系统微分方程，若系统起始状态为 ，分别就以下两种激励信号求系统的完全响应，并指出零输入响应和零状态响应分量。 2、给定系统微分方程，若系统激励信号
，系统的起始状态为 y ( 0 - ) = 1 ， y ′( 0 - ) = 0，求系统的完全响应、 零状态响应、零输入响应。 3、已知某系统对激励 的完全响应为，对激励的完全响 应为 ⑴ 求系统的零输入响应 ⑵ 若系统起始状态不变，求系统对激励的完全响应。 4、题图所示系统是由几个“子系统”组成，各子系统的冲激响应分别为： )()(1t u t h = （积分器） )1()(2-=t t h δ（单位延时） )()(3t t h δ-= （倒相器） 试求总的系统的冲激响应)(t h 。 1、求图示频谱函数F （j ω）的傅里叶反变换，f （t ）=F -1 [F （j ω）]，并画出 f （t ）的波形图。 ω 2、系统如题图（a ）所示，低通滤波器的传输函数如题图（b ）所示，已知 ()Sa(2)x t t π=，()()3 n n s t t δ∞ =-∞ = -∑ ω
高中英语优质课课件Homework
Homework Revision for Book 6 Unit 2 Poems 惠州市光正实验学校曹慧嫱 Ⅰ. Go over the words and the phrases of Unit 2. Prepare for the dictation of this unit. Ⅱ. Go over the content of the Subjunctive Mood on Page 86-87 in your textbook. Ⅲ. Finish the exercises below: 一. 用本单元所学单词的适当形式填空 1. The message __________ (传达)here is clear: Actions speak louder than words. 2. They are trying hard to reduce the harm caused by pollution to a ____________ (最低限度). 3. The company where her father works is one of the _________ (赞助商) of the Olympic Games. 4. Is it an a_______________ time to make a speech now? 5. I’m fully aware that it’s the experience from my life abroad has totally t___________ me. 6. To his s__________, he lost all his possessions because of his failure in his business. 7. Are you doing anything _____________ (particularly) tonight? 8. As a matter of fact, employees expect to work ____________ (flexible) in the workplace. 9. Any behavior that is repeated enough times will ___________ (eventual) become a habit and happen automatically. 10. He is good at English _____________ and has ___________ many novels. (translate) 二、单句写作 1. In this letter, I would like to _________________________ for your assistance. 对于您的帮助，我想在这封信中表达对你的感谢。 2. ______________, and you will be all right in a couple of days. 别担心，过几天你就会痊愈的。 3. About 5% of the US population _____________________ American Indians. 美国人口的大约百分之五是由美国印第安人组成。 4. Mothers holding jobs outside the home __________________ to make it easier to care for their children. 在家庭外有工作的妈妈应该有灵活的工作时间表，这样他们就能照看孩子更容易些。 5. We are __________________________ the petrol. We must find a gas station immediately. 我们的汽油快用完了，我们必须赶快找到加油站。 6. Sports clothes _______________________ a formal wedding. 运动服不适合在正式婚礼中穿。 7. We students ____________________________________________, who are rich in experience, and above all, love us most in the world. 我们学生应该经常和父母交换想法，他们经验丰富，而且最重要的是，在这个世界上他们是最爱我们的人。 8. I can tell you the truth, but you must promise ________________________. 我可以告诉你真相，但你要承诺不要泄露秘密。 9. The inventor is excited, and he is going to ___________________________. 这位发明家很兴奋，他要试一下他的新机器。 10. If_____________________________ (没有电)，what would happen? 11. How I wish you _______________________________ (能来参加聚会) this weekend. 12. 要不是你对伤员进行急救的话，他早就死了。 _______________________________________________________________________________ 13. 你如果对计划早点儿做出调整，就不会陷入困境了。 _______________________________________________________________________________ 14. Grace doesn’t want to move to New York because she thinks if she ___________ (居住) there, she wouldn’t be able to see her parents very often. Homework Revision for Book 6 Unit 2 共1页
人教版高一英语必修二Unit 1课文翻译
人教版高一英语必修二Unit 1课文翻译 Unit 1 Cultural relics Reading IN SEARCH OF THE AMBER ROOM 寻找琥珀屋 Frederick William Ⅰ，the King of Prussia , could never have imagined that his greatest gift to the Russian people would have such an amazing history . 普鲁士国王腓特烈·威廉一世绝不可能想到他送给俄罗斯人民的厚礼会有这样一段令人惊讶的历史。This gift was the Amber Room , which was given this name because several tons of amber were used to make it . 这件礼物就是琥珀屋，它之所以有这个名字，是因为造这间房子用了好几吨的琥珀。The amber which was selected had a beautiful yellow-brown colour like honey . 选出来的琥珀色彩艳丽，呈现蜂蜜一样的黄褐色。The design of the room was in the fancy style popular in those days . 琥珀屋的设计采用了当时流行的别致的建筑式样。It was also a treasure decorated with gold and jewels , which took the country's best artists about ten years to make . 它也是用金银珠宝装饰起来的珍品。一批国家最优秀的艺术家用了大约十年的时间才把它完成。 In fact , the room was not made to be a gift . 事实上，这个琥珀屋并不是作为礼物来建造的。It was designed for the palace of Frederick Ⅰ. 它是为腓特烈一世的宫殿设计(制作)的。However, the next King
卫星无线蜂窝网络-homework1
1、How a cellular phone call is made？ Cellular telephone, sometimes called mobile telephone, is a type of short-wave analog or digital telecommunication in which a subscriber has a wireless connection from a mobile phone to a relatively nearby transmitter. The transmitter’s span of coverage is called a cell. As the cellular telephone user moves from one cell or area of coverage to another, the telephone is effectively passed on to the local cell transmitter. A cell phone is - put simply - a kind of two-way radio that acts in the same way as a telephone. However, naturally a cellular phone is much more complex than a simple walkietalkie, as cell phones permit two people to speak at the same time, making calls and receiving calls, three-way calls, call holding, voice mail, text messaging, etc. However, similar to walkie talkies, all mobile phone calls are entirely unprotected and can be intercepted by other devices. Cell phones aren't at all as "secure" as wired telephones. They have the same security level as a radio - which, after all, they are. When you place a cellular phone call, you dial the number and press the send button. A number of steps then follow: ●Your cell phone scans for the nearest base station in order to provide it with the strongest signal and, in turn, the best possible connection. It checks 21 different control channels to determine the strongest available signal. ●Your cell phone then selects the strongest signal for its use. ●An origination message (a very short message of about ?? second in length) is then sent by the cellular phone, which includes its MIN (Mobile Identification Number, that is, your cellular phone number), as well as the ESN (Electronic Serial Number), and the number that has been dialed. ●Once the cellular service provider verifies that you are among its customers - based on the sent-out MIN and ESN - the base station sends a channel assignment message to the cellular phone (another ?? of a second in length), telling the phone where the conversation will be. ●The cell phone then tunes into that assigned channel and the call begins. All of this has happened by the time you hear the ringing or busy signal on the other end of the phone. 2、Why the cellular pattern is hexagon? In a cellular System a land area is divided into regular shaped cells, which can be hexagonal, square, circular or some other irregular shapes, although hexagonal cells are conventional. This is because there are some criteria for the cell shape, which are ●Geometric shape ●Area without overlap ●Area of the cell And the eligible shapes for these criteria are Square, circle, equilateral triangle