1、日常活动/主要工作（职业活动）/社交生活 Dear bob, I’ll tell you something above my daily life in this email and hope you will find it interesting. I usually get up early and go to work at 8 o’clock. I have lunch in the office . And I come back home at six. As a secretary , I deal with phone calls , emails and faxes during work hours . I also do the paper work for the manager . After work , I like to do shopping with friends or watch TV at home . sometimes I also like to chat on the internet. Best regards, Michelle 2、童年的梦想/目前的情况/对未来的希望 1st august 2005 Dear Jennifer, Thank you for telling me about yourself, I’d like to let you know more about me too. As a child , I wanted to be a detective , I thought a detective was really great because he could solve criminal cases to do justice . But my dream never came true. I’m mow a librarian dealing with books every day . The work is nothing thrilling, but I like it , Since there are more and more electronic materials, I hope that we will have an e-library built soon . Looking forward to hearing from you again. Best regards, Ian 3、事件发生的时间和地点/人物/事件的经过 One day last week, a girl parked her car outside a fashion house, As soon as she was inside , two men opened the car door , started the engine and drove away in just one minute , When the girl recovered from the shock, she called 110 . Luckily, there was a police patrol car nearby . So the girl got in the police car and they drove in the direction where the thieves escaped . Twenty minutes later , they found the car waiting at a busy crossroad for the traffic lights to turn green . Needless to say , the car thieves were caught red-handed. 4、自主（autonomous）学习与过程教育/自主学习与合作 （collaborative）学习/你自己的学习情况 Autonomous learning is an important learning style in distance education . It is an essential skill for distance learners because they study alone most of the time They do not meet their tutors or classmates very often . However ,distance learners can learn a lot from each other . So autonomous learning learner . I have to do most learning tasks by myself . Meanwhile we have group activities every two weeks to complete some learning tasks or share experiences . I have found both forms of learning very helpful. 5、有一种观点认为：声调生活比乡村生活好/你对这种观点的看法 /你的结论 Some people believe that town life is better than country life . I don’t agree with this . Town life can be convenient to us in many spects . For example , you can move around easily, shopping can be more fun in a big shopping mall and you can enjoy a more colorful nightlife . But there are also many disadvantages , It is much nosier than in the country . Air pollution is more serious , It is not easy to park your car . It costs more to live in town. To name but a few is enough Therefore, I prefer country life. 6、保持身体健康的重要性/保持身体健康的方法/重申保持身体健 康的意义 Nowadays more and more people know the importance of keeping healthy, Without a healthy body, we can do nothing . For me there are three main ways to keep healthy . First , it is necessary ot keep a balanced diet , which is the basis of good health , It is better for us to have more fruit and vegetables everyday , Secondly , it is important to take regular exercises , such as swimming , jogging and so on . Last but not least , it is euxenite to keep in a good mood . Relaxation and entertainment are ways go renew our spirits and release our stress . When we make healthy habits a part of our everyday life, we are bound to keep healthy. 7、哪一种是你最喜欢的交通方式/阐述你的理由/做出结论 In a modern city , there are many means of transportation , such as subway , taxi , bus and so on .But my favorite means of transportation is by bike. First , riding a bike is good for keeping healthy . I spend one hour riding a bike to my office on my working day , and I think it is a good form of physical exercise . Secondly , it is money-saving ,Recently , the private car drivers always complain the price of gas is higher and higher but if you ride a bike , it will cost you nothing ,Thirdly, it is beneficial for protecting the environment , so it is a “green” form of transportation . Therefore , although it has some disadvantages, I like riding a bike best . 8、描述你家的位置/各信房间的功能/表达你对家居条件的态度 My home is a newly-built house in the north of the city . We have three rooms in addition to the kitchen and bathroom . The first room is the main room or living room . It is for having meals . relaxing , reading , watching television and so on . It is the busiest room in the house .The second room is my daughter’s bedroom . She sleeps and tresses there . The third room belongs to my wife and me . It seems quite spacious because we have little furniture . We sleep . prepare 精品文档
Sports 1．你喜欢什么运动。 2．你如何喜欢上这种运动。 3．运动对你有什么益处（工作、学习和生活）。 Sports Just as lots of teenagers take to pop music, I love basketball. It’s part of my life. I began to play basketball in my childhood. I still remember the good old days when I played with my classmates after school. Later on, as I grew up, almost everything changed, but this sport-playing basketball remained and my love of it grew even stronger. I love this sport because it brings joys and health to my life. When I got tired from office work, I went to the sports ground and felt refreshed. If there were worries and cares from daily life. I went to the sports ground. There everything went away except basketball. It is basketball that keeps me in good shape and mood. Water and Life 1．随着工业化（industrialization）的推进，地球上的淡水（fresh water）越来越少。 2．生命没水就要消亡（disappear），因此人类要珍惜（treasure）淡水。 3．我们如何节约用水。 Water and Life While we are enjoying the rich fruits of modern industrialization, we are losing something precious on this planet. Fresh water, among others, is dwindling down day by day, owing to the large-scale industrialization everywhere in the world. Just as sunshine is a necessity to life, so is fresh water. Without fresh water, our human society would come to a stop. As fresh water is such an important resource to the human society, we need to treasure it as we treasure our life, but how? First, our government should have a good plan for the use of fresh water and develop industries that consume less water. Second, waste water must be recycled. Finally，everyone of us should do his bit to save water. A Get-together on May Day Holiday 1．了解对方近日的情况。 2．你的近况并通知他（她）；五一长假有一个同学聚会。 3．邀请对方参加。 A Get-together on May Day Holiday April 15, 2009 Dear Wang Hong: How is everything getting along with you? It is almost one year since we graduated from university. I miss you very much. What have you been doing all these days? I have been a middle school teacher in my hometown since graduation. Teaching always keeps me busy, but I like my students and I love teaching, you know. So everything is fine here. There will be a former classmates’ getting together during this May Day holiday at my school. You are my best friend. I never forget those happy days we spent together. I hope you will be free then and can come to my school attending the party. I am looking forward to your reply. Help Me to Buy A Spoken English Book 1. 介绍你的近况。 2. 请他帮你买本英语口语书。 3. 欢迎他方便时来访。 Oct. 16 2007 Dear Li Hua, It’s long time we haven’t seen each other. I miss you very much. How’s everything going on with you? I am busy preparing for PETS 4. I would appreciate if you could help me buy PETS4 English oral textbook which was issued by the Beijing Press, because the books were sold out here. Drop in when you are free. I often think of those happy days we spent together when we were at University. Please let me know as soon as possible once you get the book.
（4） Directions: For this part, you are allowed thirty minutes to write a passage on the topic My Home. You should write at least 80 words and base your writing on the Chinese outline below. 1．描述你家的位置 2．各个房间的功能 3．表达你对你们家居条件的态度 参考范文： My Home 1.My home is a newly-built house in the north of the city. We have three rooms in addition to the kitchen and bathroom. 我的家是一个新建的房子在城市的北边。我们有除了厨房和卫生间有3间房间。 2.The first room is the main room or living room. It is for having meals, relaxing, reading, watching television and so on. It is the busiest room in the house. The second room is my daughter’s bedroom. She sleeps and dresses there. The third room belongs to my wife and me. It seems quite spacious because we have little furniture. We sleep, prepare lessons and generally relax there. 第一个房间是一个主要生活间或者说是客厅。这是用来吃饭、休息、读书、看电视或者其他一些活动的地方。这是房子里最忙的房间。第二个房间是我女儿的卧室。她在里面睡觉、换衣服。第三个房间属于我的妻子和我。它看起来相当宽敞因为家具很少。我们在里面准备课程、普遍都在里面休息。 3.I think my home is cozy and I like my home. 我觉得我的家很舒适，我喜欢我的家。 （5） Directions: For this part, you are allowed thirty minutes to write a letter to a new friend, telling him/her about your ambitions and dreams. You should write at least 80 words and base your letter on the Chinese outline below. 1. 童年的梦想 2. 目前的情况 3 对未来的希望 参考范文： 5th January 2010 Dear Mary, Thank you for telling me about yourself. I’d like to let you know more about me too. 亲爱的Mary，谢谢你告诉我关于你的事情。我也想让你更了解我。 1.As a child, I wanted to be a detective. I thought a detective was really great because he could solve criminal cases to do justice. 从小，我就想变成一个侦探。我觉得一个侦探非常棒，因为他能公平的解决刑事案件。 2.But my dream never came true. I’m now a librarian, dealing with books every day. The work is nothing thrilling, but I like it.
如有你有帮助，请购买下载，谢谢！ 一、交际英语 1、- Thank you ever so much for your lovely gift. - ___B___ A：Never mind B：I'm glad you like it. C：Please don't say so. D：No, It's not so good. 2、Would you go to the concert with me?_____A____, but I'm very busy now. A：I'd like to B：Sure C：No problem D：Certainly 3、- Thank you for inviting me. - _____C______ A：I really had a happy time. B：Oh, it's too late. C：Thank you for coming. D：Oh, so slowly? 4、- Hello, I'm Harry Potter. - Hello, my name is Charles Green, but _____C______. A：call my Charles B：call me at Charles C：call me Charles D：call Charles me 5、- Excuse me, could you show me the way to the nearest post office? - ___D___ Oh yes! Two blocks away from here at the Green Avenue. You can't miss it. A：I beg your pardon? B：What do you mean? C：You're welcome. D：Mm, let me think. 二、阅读理解 1、Mrs. Weeks was reading a newspaper story to her class. 威克斯老师正在读报纸上的一个故事给她班上的学生听。The story said: "Were you ever in a hospital when you were small? How did you feel?" The doctors in Children's Hospital are asking for money for children's toys. Some children in the hospital must stay in bed for many weeks. Toys are needed to keep the sick children happy and quiet. Money for them can be sent to the hospital. After Mrs. Weeks read the story，she said，"This story gave me an idea." "You want us to bring some money for the toys." "We could bring some of our own toys for the children in the hospital, "said the boys and the girls one after another. "Well, your ideas would be nice, "Mrs. Weeks said，"but mine is different." "We could make some toys, "shouted one of them. Mrs. Weeks smiled. "Do you think you could make toys?" she asked. "Yes, yes, "the whole class answered. "Great! Let's begin to make toys tomorrow, "said Mrs. Weeks. On Saturday afternoon，Mrs. Weeks took the children to the hospital with the toys made by her students. The children in the hospital felt very happy to see the toys. So did the children in the class. A few days later，Mrs. Weeks read another newspaper story to the class: Some school pupils brought toys to Children's Hospital last week. The toys were made by the pupils of Grade Three in Green Street School. The doctors said，"We have never had so many wonderful toys. Our children are very happy with them. They say，'THANK YOU，GRADE THREE.'" (1)、The first newspaper story was mainly about sick children in children's Hospital. T A：T B：F (2)、Let the class make some toys and give them to the children in the hospital was in Mrs. Weeks' mind. T A：T B：F (3)、At first，the doctors in Children's Hospital wanted to get some money to buy toys for the sick children. T A：T B：F (4)、From the passage we can learn that what Mrs. Weeks really wanted to do is to ask her class to save money for toys. F A：T B：F (5)、The author's tone in this passage is enthusiastic. T A：T B：F 2、Places to stay in Britain are as varied as the places you visit. 在英国，住的地方随着你游览地点的不同而有所区别。Whatever your budget is the choice -from basic barn to small hotel, from tiny cottage to grand castle - is all part of fun. Hostels Cheap, good-value hostels are aimed at all types of like-minded travelers, who prefer value over luxury and you don't have to be young or single to use them. Britain's independent hostels and backpackers hostels also offer a great welcome. Facilities and prices vary, especially in rural areas, where some hostels are a little more than a bunkhouse (临时住房) while others are remarkably comfortable －almost like bargain hotels. Youth Hotels Founded many years ago to "help all, especially young people of limited means, to a greater knowledge, love and care of the countryside", the Youth Hotels Association is still going strong in the 21st century. The network of 230 hotels is a perfect gateway for exploring Britain's towns and countryside. B&Bs The B&B (bed and breakfast) is a Great British institution, In essence you get a room in somebody's house, and small B&Bs may only have one guest room, so you'll really feel like part of the family. Larger B&Bs may have four or five rooms and more facilities, but just as warm as a welcome. In country areas your B&B might be in a village or an isolated farm surrounded by fields. Prices reflect facilities: and usually run from around ￡12 to ￡20 per person. City B&Bs charge about ￡25 to ￡30 per person, although they're often cheaper as you go further out to the suburbs. Pubs & Inns
词汇与结构 (共185题) 符号 (注：**有两个空；方框中的题为特殊题) he __ that food.** –What’s happened to Tom? -- (He’s been taken) to hospital. –Where (have you put; put) the recorder? I can't see it anywhere.– I ______ it right here, but now it's gone. ** --- Which do you like better, real movies (or, to) cartoons? --- I prefer cartoons __ real movies.** (As a rule), we keep records on all the experiments so that we may have enough data. (Bidding) for the Olympic Games begin about ten years in advance. (Each) of them has a bedroom and a study. (Leave) it with me and I’ll see what I can do. (The) majority of people agree with him. (Unless) he studies hard, he will never pass the exam. (Unless) you change your mind, I won't be able to help you. (What) fine weather it is! (What) he said is quite right. (What) she couldn't understand was why fewer and fewer went to him for help. A A lecture hall is ( one ) where students attend lectures. After ( winning ) the bid, major construction began in Beijing. After (checking) the shopping list, I found that I forgot to buy salt. All the team members tried their best. We lost the game, (however). Ancient Greece is the (origin) of western civilization. Ann is studying ( politics ) at university. Are you still here? You were here half an hour ago. Who (are you waiting)for? At present, the most important thing is that Britain needs (to do) more to improve the relationship with the USA. B Be sure to (bring) your wife when you come here this evening. Before I got to the cinema, the film (had begun). Before joining the army, he spent a lot of time in the village (to which) he belonged. Before she left on the trip, she (had trained ) hard. By next year, he (will have worked) in New York for five years. C China is (in) the east of Asia. Could you tell me (how long you have lived here)? Could you tell me (where I can find a toilet)? D Do you think Tommy is (telling) the truth? Does this patient’s record need (completing) now? No, you can finish it later. Does this patient's record need (completing) now? No, you can finish it later. D on’t want you to make any trouble, (on th e contrary) , I urge you to solve the problem. Don’t worry, your watch (is being repaired) and the room. Dr. Hoffman proposed that we (put off) the meeting until next week. E Everything (would have been destroyed) if Albert h adn’t called the fire brigade. F Frank plays (a lot better than) Alex. G Hardly (had I got) home when it began to rain. He (has been working) in the laboratory the whole morning. He (is like) his father for both of them love walking in the countryside. He asked me where (I came) from. He didn’t want anything to drink because he (had) already drunk. He has been ( in danger) in hospital for a month. He has three companies (employing 50 people each). He is the man ( whose )dog bit me. He keeps ( looking ) at himself in the mirror. He kept the light in his room (burning) the whole night. He spends a quarter of the day (sleeping ) He was ( over the moon ) about his new job. He was sick，but he (got over) it at the weekend. He, as well as I, (is) a student. Her parents died when she was very young, so she was ( brought up )by her aunt. I I (shall have finished) reading the book by the end of this week. I am leaving for New York (in) three days; time. I broke my leg when I (was) skiing in America.
如何画根轨迹： In theory , the entire s-plane should be searched in order to find points satisfying the magnitude and angle condition . This however is unnecessary since the proper interpretation of the magnitude and angle condition yields several rules that facilitate the rapid construction of the root loci plot . Although this plot is approximate , it suffices for purpose of a preliminary study . The following rules are therefore to be considered as aids for an approximate root loci: 1.The root loci begin at the open loop poles. 2.The root loci end at the open loop zeros . 3.The number of separate loci is equal to the open loop poles. 4.The loci are symmetrical about the real axis. 5.Asymptotes of the root locus . 6.Root loci on the real axis. 7.The angle of arrival and departure . 8.Breakaway point on real axis. 9.Intersection of the root loci with the imaginary axis. PID控制器的优点： In engineering practice, the regulator control law for the proportional, integral, differential control widely, referred to as PID control, also known as PID regulator. The PID controller has been developed for nearly 70 years, with its simple structure, good stability, reliable work, convenient adjustment and become one of the main technology in industrial control. When fully grasp the structure and parameters of the controlled object can not, or lack of accurate mathematical model, control theory it is difficult using other techniques, the structure and parameter of the controller must rely on experience and on-site testing to determine, the application of PID control technology is the most convenient. When we don't fully understand a system and the controlled object, or cannot obtain system parameters through the effective means of measurement, the most suitable PID control technology. PID control, in practice there are PI and PD control. PID controller is the error of the system, using the proportional, integral, differential calculation for the control of the volume control.