整理后大工12春专升本《电力电子技术》《英语4》《管理学》《经济学》在线作业
上海工程技术大学电气专升本真题
上海工程技术大学电气专升本真题1、下列对有关名著的说明，不正确的一项是( ) [单选题] *A.《红楼梦》秦可卿死后，贾珍因尤氏犯了旧疾，不能料理事务，请王熙凤帮助丧事。
王熙凤安排妥当，恩威并施，威重令行，将两府的事情安排得停停当当。
B.《红楼梦》展现了贾府这一富贵之家从繁盛到衰败的过程，描写了以贾宝玉和一群红楼女子为中心的人物的悲剧命运，反映了具有一定觉醒意识的青年男女在封建体制下的历史宿命。
C.《红楼梦》中宝玉挨打后，林黛玉“早听人一句话，也不至今日。
别说老太太，太太心疼，就是我们看着，心里也疼”的一席话，表达了对宝玉的无比爱怜与关心。
(正确答案)D.“玫瑰花又红又香，无人不爱的，只是刺戳手，也是一位神道，可惜不是太太养的，”“老鸹窝里出凤凰”。
这是《红楼梦》中兴儿所言，“玫瑰花”指的是探春。
2、下列词语中，加着重号字的注音正确的一项是（）[单选题] *A、虹霓（ní）哂笑（xī）B、抽噎（yē）铿锵（kēng）(正确答案)C、茶峒（dòng）跬步（guǐ）D、残羹冷炙（zì）刮痧（shā）3、下列词语中，加着重号字的注音正确的一项是（）[单选题] *A、外甥（shēn）窘迫（jiǒng）刮痧（shā）秩序（zhì）B、筹划（chóu）供给（gěi）家谱（pǔ）惦记（diàn）C、蛮横（hèng）拥挤不堪（kān）发愣（lèng）济南（jǐ）(正确答案)D、私塾（shú）廿三（niàn）丧事（sāng）撮土（chuō）4、下列对《红楼梦》有关内容的说明，不正确的一项是（）[单选题] *A.《红楼梦》中“宝黛初会”时宝玉有摔玉举动，摔玉的原因是家里姐姐妹妹都没有，来了一个神仙似的妹妹也没有。
可见宝玉性格率真任性。
B.贾母问黛玉读什么书时，黛玉回答“只刚念了《四书》”，但当宝玉问时，她却说“不曾读，只上了一年学，些须认得几个字”。
国家开放大学电大《高级英语阅读(1)》《机电控制工程基础》网络课形考网考作业(合集)答案
国家开放大学电大《高级英语阅读(1)》《机电控制工程基础》网络课形考网考作业(合集)答案《高级英语阅读(1)》网络课答案形考任务一（70分）Chapter 1 Exercise（分值7分）题目1I. Vocabulary skills（3 points）Look at the columns below. Match each vocabulary word on the right with the correct definition on the left.(0.5 points each)1.the bus or subway2.proof of completion of courses of students3.money for students from scholarships, grants, or loans4.formal talks by professors or instructors on subjects of study5.courses by video, video conferencing, or computers to students in different places6.the points or grade a student gets on a test答案：II. Reading Comprehension (4 points)Read the passages, then answer the questions that follow. (1 point each )Experiencing Culture ShockA When Eliza James arrived at the University of Xian, she was excited to live in a new country, to improve her Chinese, and to experience a culture so different from her own. But soon her excitement turned to frustration as she encountered one roadblock after another. "I felt like I couldn't accomplish anything. My dorm room had no heat, I couldn't get into the classes I wanted, and every time I asked someone for help they gave me the runaround. I felt like no one was listening to me." Eliza met with administrators, sent letters of complaint, and even contacted the consulate in Beijing, but she got nowhere. What Eliza didn't realize was that her American approach to solving problems was very different from the Chinese one in whichpatience and negotiation skills are key. She soon learned how to solve problems within the cultural norms of Chinese society instead of forcing her own values onto those around her. "I finally feel like I fit in and that I know what I'm doing. In fact, it's really fun being in a place that's so incredibly different from what I am accustomed to."B Yoshi Yamamoto is a junior at a small college outside of Boston. Although he is an honors student now, Yoshi didn't always have such an easy time studying in America. "Teaching methods are very different here than they are in Japan. It took me a long time to get used to learning in seminars and discussing ideas with my classmates. At first it seemed like I wasn't actually learning anything." Yoshi's reaction was to totally withdraw: he didn't participate in class discussion; he spent lots of time alone in his room, and he even skipped class on occasion. "I thought I could teach myself. Now I recognize the value of the U.S. academic system, and I am able to adapt it to my own learning style."C Both Eliza and Yoshi experienced what is called culture shock: psychological disorientation due to living in a new culture. For many international students, studying abroad can offer exposure to new cultures and an opportunity to study new fields and languages. However, it also offers the greater challenge of trying to function in a foreign culture. Studying and reading about a certain culture is poor preparation for the reality of living in it. According to psychological studies, the four stages of culture shock are 1. euphoria, 2. hostility, 3. gradual adjustment, and 4. adaptation. Culture shock can be manifested in many ways: homesickness, boredom, stereotyping of or hostility towards the host culture, overeating or overdrinking, withdrawal, and inability to work effectively.D Different people experience different levels of culture shock and react in different ways. For example, Eliza got angry while Yoshi withdrew from society. The most important thing to remember is that culture shock is normal; it is not something to be ashamed of. Luckily, there are some things international students can do to make their adjustment to a new country go more smoothly. For instance, they can stay in touch with family and friends from home, join international student organizations, meet people from their own countries, and get involved in campus activities. Most importantly, they can adjust to life abroad by keeping a sense of humor and trying to remain positive.Recognizing Paragraph Topics（choose the paragraph letter）题目27. an explanation of culture shock选择一项：A. AB. BC. C题目38. ways that students can adjust to living in a new country选择一项：A. AB. BC. CD. D题目49. the experience of an international student in the United States选择一项：A. AB. BC. CD. D题目510. the experience of an international student in China选择一项：A. AB. BC. CD. DChapter 2 Exercise（分值7分）题目1I. Vocabulary Skills（2 points）Sometimes examples can explain the meaning of a word or phrase. For example, sun, rain, and wind are examples of kinds of weather. Look at the columns below. Match each vocabulary word or phrase in the first column with the examples in the second column. (0.4 points each)1.kinds of extreme weather2.Earth’s natural materials and gases3. diseases or health disorders4. seasons of the year5. natural areas or regions of the earthII. Reading Comprehension (5 points)Complete the following statements by choosing the best from the answers A, B or C. (1 point each) Seasonal Affective Disorder: More than Just the BluesA Joshua dreads the winter months, not only because of the cold New England weather--the sleet, snow, wind, and rain--but because as the seasons change from summer to fall to winter, the days get shorter. As the days get shorter, he starts feeling depressed and irritable and spends more and more time at home, eating and sleeping. A graduate student in philosophy, Joshua finds that he gets little work done during the winter months and has trouble paying attention in class and concentrating on his research. "I soon realized that what I thought was just the 'winter blues' was something more extreme than that." Josh visited a doctor who diagnosed him with SAD.B Seasonal Affective Disorder, or SAD, is a kind of depression that occurs seasonally. It is associated with the long hours of darkness and lack of sunlight during the winter months (people with SAD usually feel worse from December through February). Scientists don't completely understand the exact causes of SAD, but they believe it is related to a biochemical imbalance in the hypothalamus. The hypothalamus is the basic part of the brain that controls the body's breathing, heartbeat, metabolism, and hormone release. The effects of SAD include moodiness, irritability, low energy, increased appetite for carbohydrates (foods such as potatoes, rice, and bread), difficulty concentrating, and the tendency to oversleep.C Although doctors described SAD for the first time in 1984, humans have probably dealt with the disorder for thousands of years. It is not a coincidence that many cultures have important celebrations during the short days of the winter months. Christmas, Hanukkah, and Winter Solstice celebrations all occur in December. These celebrations involve lighting candles in order to bring light, warmth, and happiness to an otherwise depressing time of year.D So what can SAD sufferers do to feel better? Naturally, they need more light. For people who have mild cases of SAD, exercising in the morning sun could be enough to help them. Phototherapy, or light therapy, is usually prescribed for people who have more serious cases of the disorder. In light therapy, patients sit in front of a light box, a strong artificial light, for up to four hours a day. Phototherapy is effective in over 80% of SAD cases, and patients usually see results within three to four days. Although the symptomsof SAD are similar to those of clinical depression, traditional antidepressants have not proven useful in treating SAD. While psychological counseling cannot treat the symptoms of SAD, it is recommended to help SAD sufferers learn to accept and deal with their illness.题目26. Joshua starts feeling depressed and irritable in the winter because选择一项：A. he gets little work doneB. he suffers from Seasonal Affective DisorderC. he is a graduate student in philosophy题目37. Seasonal Affective Disorder, or SAD, is a condition that researchers believe affects people during the winter months. Scientists believe it is caused by选择一项：A. breathing, heartbeat, metabolism, and hormone releaseB. moodiness, irritability, loss of energy, increased appetite, difficulty concentrating, and sleepinessC. lack of sunlight and a biochemical imbalance in the brain题目48. Humans have probably struggled with SAD since选择一项：A. ancient timesB. DecemberC. 1984题目59. People who suffer from SAD can to feel better.选择一项：A. do light therapyB. take antidepressant drugsC. eat carbohydrates题目610. This passage talks about_____.选择一项：A. what the SAD effects areB. Both A and B.C. how to help SAD suffersChapter 3 Exercise（分值7分）I. Reading Comprehension (5 points)Read the passages, then answer the questions that follow. (1 point each )Fast food can be good foodMany people are too busy to prepare and eat three nutritious meals a day.so they turn to the convenience of fast-food restaurants. Many of the items at fast-food restaurants, snack bars, and food stands are fattening and not very nutritious.But fast food d oesn’t have to be unhealthy.you can eat at fast-food restaurants and still eat well.Pay Attention to Calories and Fat ContentBy paying attention to the number of calories and fat that a food item has ,you can make smarter choices.Calories are “units for measuring how much energy a food will produce”.condsider two fast-food meals. A quarter-pound hamburger with cheese, jumbo-size fries,and a 16-ounce soda have a total of 1,535 calories and 76 grams of fat .a broiled (cooked under direct heat or over a flame )chicken sandwich ,a side salad with low-fat dressing,and a glass of water at the same fast-food restaurant have only 422 calories and 7 grams of fat .but maybe you really want a hamburger and fries .well,you can have a small hamburger,a small serving o f fries,and a glass of water.At a total of 490 calories and 20 grams of fat,that’s still a much smarter choice than the large burger ,fries,and 20 grams of fat ,that’s still a much smarter choice than the large burger,fries,and sada.There’s More That You Can DoThere are a few additional things you can do to make sure you eat well in fast food restaurantS.First of all,say “no” when the cashier asks you if you want to “supersize” you meal (order an extra large portion of each item).Second, ask for no mayonnaise or sauce,or ask for it on the side (in a separate dish).Third,substitute(use something instead of something else)healthy foods for fatty ones. For example,instead of ordering deep-fried tempura,order fresh vegetables.Instead of ordering a beef burrito with lots of cheese and sour cream,order a vegetable burrito with beans and rice.and don’t eat the chips!Another thing you can do is order a side salad or a vegetable soup and eat it first.That way,you will eat some vegetables,and you won’t be able to eat as much of your burger and fries.Fnally,eat slowly and stop eating when you’re full. It sounds simple,but many people keep eating even after they become full.题目11.What is the main idea of this article ?________选择一项：A. It’s smart to eat foods with low calories and fat content.B. Fast food is always bad for you .C. You can eat well in fast-food restaurantD. Fast-food restaurants are the best the place to find healthy foods .题目22.A small hamburger and small firies has __________选择一项：A. more calories and fat than a chicken sandwich and a salad.B. the same amount of calories and fat as a chicken sandwich and a salad.C. fewer calories and fat than a chicken sandwich and a salad.D. the same amount of calories and fat as a large portion of fries.题目33.Some things you can do to eat well in fast-food restaurants are________选择一项：A. ask for eatra manyonnaise and sauce and say no to “surpersizing” .B. order a vegetable burrito instead of chips and eat sour cream .C. order smaller portions and eat all the food you order.D. order healthy foods instead of fatty ones and drink water.题目44.Manyonnaise and sauces probably_________选择一项：A. make you eat less because they make you feel full sooner.B. make you eat more because they make your food taste better.C. have a lot of fat and calories.D. don’t have a lot of fat and calories.题目55. By eating a salad or soup before the rest of your meal,_______选择一项：A. you eat less of the rest of your meal.B. you eat more slowly.C. you get full sooner.D. you eat the rest of your meal more quickly.II. Vocabulary skills（2 points）Read the paragraph below and fill in each blank with a word from the box. (0.4 points each)题目6changes damaging losing global availableThe growing similarities in diet and eating habits around the world are influencing people of various cultures in different ways. For example, Western foods are 6 damaging health in the industrialized island country of Japan. Instead of small meals of seafood, rice, and vegetables, the typical Japanese diet now includes large amounts of meat, dairy products, and desserts like tiramisu, a rich Italian dish full of chocolate, cheese, and sugar. According to Japanese health researchers, such 7 changes in eating habits are related to a great increase in health problems such as heart disease, strokes, cancer, and diabetes. On the other hand, the changing 8 global diet is having the opposite effect on the people in the CzechRepublic. The government of this European nation no longer supports meat and dairy products financially, so the cost of these foods is going up. In contrast, fresh fruits and vegetables are becoming more widely 9 available from private markets and stands. Cooks are even serving salads to schoolchildren, and families are eating healthier home-cooked meals. For these reasons, fewer Czech men are having heart attacks, the women are 10 losing a lot of weight, and most people are living healthier lives.Chapter 4 Exercise（分值7分I. Vocabulary Skills（2 points）题目1Match each vocabulary word on the left with the correct definition on the right. (0.4 points each)1.make sense2.pedestrians3.vehicle4.teenager5.fine答案：II. Reading Comprehension (5 points)Complete the following statements by choosing the best from the answers A, B, C, or D. (1 point each) These days, it’s getting easier and easier to find your way around. Some people have GPS devices in theircars to make sure they don’t get lost. GPS stands for Global Positioning System. These devices use satellites in space to “see” where you are and give you directions to where you want to go. And if you don’t have a GPS device, you can simply go online to get step-by-step directions. Websites like and can produce a map and directions in just a few seconds. But how do they do it? MapQuest® uses data (information) from a few different sources to produce directions and maps. Before MapQuest® went online, it sold regular paper maps in places like gas stations. The website uses the data from those paper maps, information from digital mapping companies, and government databases. At the moment, MapQuest® uses more than 30 computers to read all this data and provides users with millions of maps ev ery day.In order to find the best route (way or path) from one place to another, MapQuest® first has to look at all possible routes. Then MapQuest® looks at each part of each possible route. It considers the types of roads on the different routes. Are they dirt roads, paved roads, freeways, or city streets? It looks at how many turns there are in each route and what kinds of turns they are. Are they right turns or left turns? It also considers the speed limit on each road and how many intersections there are. An intersection is “a place where two or more roads cross each other”.MapQuest® can also tell you how long your trip will take you. It does this by doing some math. MapQuest® bases its estimated driving times on the length and speed limit of each part of the route and the amount of time it probably takes to get through each intersection. For example, it allows more time for a left turn at an intersection than it does for a right turn. Someday, maybe we will have cars that can just drive us wherever we want to go, but for now, mapping websites make it a little harder to get lost.题目26.What is the main idea of this article?选择一项：A. Why mapping websites don’t work well.B. Why mapping websites are better than paper maps.C. How mapping websites work.D. How the first mapping website started.题目37.According to the article, MapQuest®______选择一项：A. started as maker of government databases.B. started as an Internet company.C. uses millions of computers to read data.D. starting by selling paper maps.题目48.When you search for directions, the first thing MapQuest® does is_______选择一项：A. consider how many turns you want to take.B. print out a map and directions.C. estimate driving time.D. look at all possible paths.题目59.When it’s deciding on the best route, MapQuest® probably chooses ________选择一项：A. the route with the most turns.B. dirt roads instead of paved roads.C. freeways instead of dirt roads.D. city streets instead of freeways.题目610. To estimate your driving time, MapQuest® considers _________选择一项：A. the distance between turns on your route.B. the speed limit for half of the route.C. the fastest and slowest speed limits on your route.D. the speed limits and types of turns on your route.Chapter 5 Exercise（分值7分）I. Reading Comprehension (5 points)Read the five main-idea questions that follow about the information in the reading. Three details correctly answer each question. Cross out the untrue, unrelated detail. (1 point each )题目11. What are the definitions of the two main types of families?选择一项：A. Human beings lived in loosely-related groups. Each group had a common ancestor long time ago.B. The nuclear family consists of two parents and their biological or adopted children.C. The extended family may include grandparents, parents, children and relatives living together on the same street or in the same area.D. The nuclear family is the same as the extended family.题目22. What are the reasons for the changes in the structure of the family?选择一项：A. The divorce rate went down and the birthrate began to rise in the early 1900s in the United States.B. Couples did not want many children then.C. In the early 1900s in the United States, the divorce rated went down and the birthrate went down.D. At that time, couples were staying married for few years.题目33. What happened to families in industrialized countries in the 1930s and 1940s?选择一项：A. Before and during World War II, families faced few financial problems and women didn’t have to work away from home.B. Men were at war, so women had to work outside the home.C. Before and during World War II, families had problems.D. Families had serious financial problems during World War II.题目44. What changes will happen to family structure during the next decades?选择一项：A. Divorces would be fewer, mothers would stay at home after the war.B. Children began living at home longer.C. After the war, family structure changed back.D. After the war, there were more divorces and fewer stay-home-mothers.题目55. What will families be like in the future?选择一项：A. Many people want the traditional two-parent family back.B. Two-parent family will probably come back and all other family forms will end.C. Unmarried parents with adopted or foster children, and one-person households.D. There may be more single-parent families.II. Vocabulary Skills（2 points）Read the paragraph below and fill in each blank with a word from the box. ( 0.4 points each)题目6living extended category typical believeThe Family of the FutureMany people today would like the traditional two-parent family back—that is to say, they want a man and a woman to marry for life; they also think the man should sport the family and the woman should stay home with the children. However, few families now fall into this 6 category In fact, if more women decide to have children on their own, the single-parent household may become more 7typica l than the traditional family in many countries. Also, unmarried couples may decided to have more children—or they might take in foster children or adopt. And because people are staying single and 8 living longer (often as widows), there may be more one-person households in the future. On the other hand, some people 9believe similar events happen again and again in history. If this is true, people may go back to the traditional 10 extended or nuclear family of the past. Others think the only certainty in history is changing: in other words, the structure of the future family could begin to change faster and faster—and in more and more ways.Chapter 6 Exercise（分值7分）I. Vocabulary skills（2 points）Complete the following statements by choosing the best from the answers A, B, C, or D. （0.4 points each）题目11. Some examples of the architecture of old Europe are the magnificent cathedrals and castles. The design and building styles of modern architecture are excellent too. What does the noun architecture mean in these sentences?选择一项：A. the place with significant civilization everywhereB. people that study the culture of old Europe and other societiesC. the art and science of designing the study of classical literatureD. the form and plan of buildings and other structures题目22. Perhaps the real beginning of civilization—with its scientific and technological discoveries and inventions—was in the Middle East and Africa. Over five thousand years ago, those ancient civilizations had astronomy, mathematics, medicine, government, and so on. Which word is a synonym of the word civilization? 选择一项：A. technologyB. cathedralC. cultureD. astronomy题目33. The cultural legacy of ancient Chinese and Indian peoples included walled cities, the first governments, tools for work, and weapons for protection. odern peoples built on this legacy.What is a possible explanation of the word legacy?选择一项：A. ideas and achievements passed from earlier generations to modern societyB. a gift of money that somebody gives to another personC. international business conducted in cities and government structuresD. the state or condition of being legal; not against the law题目44. “For me, the idea of ancient culture creates a contradiction in definitions,” said Karen, going against Mei’s views. “Only modern things can be part of culture.Of course, people that like classical art and music will con tradict me.”What might the noun contradiction mean?选择一项：A. the opposition of two opinionsB. wearing a Hawaiian shirt in an ancient cultureC. the short forms of two words togetherD. to put words together题目55. Because of the worldwide media—movies, TV, CDs, the Internet, newspapers, magazines—everybody knows the same information, plays the same music, and enjoys the same jokes.How might you define the phrase the media?选择一项：A. the combination of visual, sound, and printed ways to send ideas around the worldB. communication styles include motions, gestures and facial expressionsC. the tradition of being in the middle—not on the extremes of possible viewsD. events that appear in the daily news and that everyone knows aboutII.Reading Comprehension (5 points)Decide whether the following statements are true or false. Write “T” for True and “F” for False. （1 point each）题目6Many visitors to different countries don’t realize how important it is to understand a country’s culture.Sometimes people learn this lesson by making a big cross-cultural blunder, or embarrassing mistake. In business situations, these blunders can cost a lot of money or end business relationships.6.It is important to understand other people’s cultures before you do business with them.选择一项：A. FB. T题目7For example, one company wanted to sell toothpaste in Southeast Asia. In their advertisements, they claimed that their toothpaste whitens teeth. They didn’t understand that many of the local people chewed betel nuts to make their teeth black, and that these people thought black teeth were attractive.7. The toothpaste company probably kept using the same advertisement in Southeast Asia.选择一项：A. FB. T题目8In another case, a car company tried to sell a car called “Matador” in a Spanish-speaking country. The company thought that it was a strong name because it means “bullfighter”. In Spanish, matador is indeed a noun meaning “bullfighter”. But it is also an adjective meaning “killing”. Imagine driving around in a car called “Killing”!8. The car company that tried to sell a car to a Spanish-speaking country probably didn’t sell many Matador cars in that country.选择一项：A. FB. T题目9A European businessman had an important meeting with a company in Taiwan. He wanted to bring gifts for the people he was meeting with. He thought that something with his company’s logo on it would be a nice gift. So he bought some very nice pocket knives and had his company’s logo printed on them. He didn’t know that giving a knife as a gift symbolizes cutting off a friendship!9. The European businessman probably researches new cultures before he visits them now.选择一项：A. TB. F题目10It’s very easy to make blunders like these people did. But it’s also very easy not to. Before you visit a new country, research that country’s customs and etiquette (social rules for polite behavior). You can find a lot of information online. Just go to a search engine and type in key words like “cross-cultural etiquette” or “cultural information Taiwan”. By spending a f ew minutes doing research, you can save yourself from a lot of embarrassment and make sure you don’t accidentally offend anyone.10. What you can disagree with people to save yourself from making cross-cultural blunders.选择一项：A. TB. FChapter 7 Exercise（分值7分）I. Reading Comprehension (5 points)Decide whether the following statements are true or false. Write “T” for True and “F” for False on the Answer Sheet. (1 point each)题目1For instance, a doctor doesn’t always have time to thoroughly explain an illness. In these cases, the Internet can be a valuable resource—a place to read all about the causes, symptoms, and remedies for an illness.1. One benefit of using the Internet as a medical resource is it has a lot of information about illnesses and diseases.选择一项：A. FB. T题目2For example, some websites claim that sniffing (smelling) a newspaper can cure nausea (the feeling of being sick to your stomach and wanting to vomit).2. One possible remedy for nausea is drinking a lot of tea.选择一项：A. TB. F题目3Other websites suggest that a person with a cold should keep a piece of raw garlic in his or her mouth all day and bite down on it every few minutes to release the juice. People with smelly feet are told to soak their feet in tea for half an hour.3. The websites remedies might be unpleasant or odd, but they probably will cause harm. And who knows? They might actually be unhelpful.选择一项：A. FB. T题目4An herbal remedy for helping your memory may also be a blood thinner. So if your doctor prescribed (put you on) a blood thinner and you start taking this herb without asking your doctor about it, a simple cut could be deadly; you might not be able to stop bleeding.4. A person who is taking a prescribed drug should probably talk to the doctor before taking an herbal remedy.选择一项：A. FB. T题目5The bottom line is this: be careful when using the Internet as a health resource. Use it to find information that you can discuss with your doctor. But don’t spend a lot of money on “miracle cures”.5. The best way to use the Internet as a medical resource is to read about your illness and discuss what you find out with your doctor.选择一项：A. TB. FII. Vocabulary skills（2 points）Read the paragraph below and fill in each blank with a word from the box. ( 0.4 points each)题目6disease substance classification prevent figureIn a small-town farm market, hundreds of elderly people drink a glass of sour dark cherry juice every day. These happy senior citizens, some of them over the age of 90, claim that the natural fruit juice cures—or at least decreases—the pain of their arthritis, a 6 disease of the joints of the aging body. It’s a folk remedy, not a proven medical therapy. Nevertheless, science is beginning to 7 figure out why sour cherry juice might work to improve the health of patients with arthritis. The secret is in the 8 substance that gives the cherries their dark red color. It belongs to a 9 classification of natural nutrients that color blueberries, strawberries, plums, and other fruits—and vegetables too. Moreover, these coloring substances。
大连理工大学《电力电子技术》在线作业1-0001
大工《电力电子技术》在线作业1-0001
（）是将电力MOSFET与晶闸管SCR组合而成的复合型器件。
A:MCT
B:SIT
C:SITH
D:IGCT
参考选项：A
电力电子器件采用的主要材料是（）。
A:铁
B:钢
C:银
D:硅
参考选项：D
电力电子器件驱动电路是主电路和控制电路的电气隔离环节，电气隔离一般采用（）隔离。
A:光
B:油
C:水
D:气
参考选项：A
全控型器件在较高频率下工作，当器件关断时，因正向电流的迅速降低而由线路电感在器件两端感应出的过电压称为（）。
A:操作过电压
B:雷击过电压
C:换相过电压
D:关断过电压
参考选项：D
下列不是晶闸管的主要参数的选项是（）。
A:额定电压
B:额定电流
C:静态参数
D:维持电流
参考选项：C
整流二极管多用于开关频率在（）Hz以下的整流电路中。
A:500
B:1k
C:5k
1。
专升本《电力电子学》_试卷_答案(可编辑修改word版)
T导通的期间，电源电压Vs加至N1绕组，电流 直线上升、电感L1储能增加，副方绕组N2的感应电势
处出现平顶的波形，由于
，因此逆变器输出电压波形也是正弦波峰处出现平顶的波形，
该波形含有很多低频谐波分量，当然对应的输出电压基波分量比没有过调制时要大一些。
22. 以图2为例，说明单端反激DC/DC变换器在连续电流模式（CCM）时的工作原理，并推导其变压器M＝Vo/Vs的表达
式
图2 （15分）
标准答案：图2所示的单端反激DC/DC变换器工作原理如下:
专升本《电力电子学》
一、 （共31题,共155分）
1. 电力二极管，BJT，SCR，MOSEFT和IGBT中，不可控器件是____________________，半控器件是________________ ____，全控器件是____________________和____________________，电压驱动控制型器件是___________________ _和____________________。 （6分） .标准答案：1. 电力二极管;2. SCR;3. MOSEFT;4. IGBT;5. MOSFET;6. IGBT;
7. 简述散热器在开关变换器中的作用。 （5分） 标准答案：开关器件在工作时会产生功耗，由于开关器件体积小，导致其热容量较小，其温度很容易快速上升。高温 时开关器件的电特性变坏，严重过热可能导致器件短时间内毁坏。为防止过热损坏，开关器件必须装有散热器，使 开关器件产生的热量由管壳经散热器传至周围空气中。
8. 简述冲量等效原理及其在SPWM中的应用思路 （5分） 标准答案：（1）冲量等效原理:大小、波形不相同的窄脉冲变量作用于惯性系统时，只要它们的冲量（面积），即变量 对时间的积分相等，其作用效果相同。 （2）应用思路:依据冲量等效原理，将幅值相同但宽度不同的窄脉来逼近理想正弦波，将其作用于惯性系统（滤波电 路）后，即可得到正弦输出电压。
国家开放大学电大本科《理工英语4》2023-2024期末试题及答案
国家开放大学电大本科《理工英语4》2023-2024期末试题及答案（试卷代号：1388）一、交际用增（共什10分小融?分）1—5 8L也择正饵的培句完成下面对话，井将答宴序号写在答融纸上。
1. —Sparr trnvcl munt be very very expensive.—The cost of a on the Virgin ciftft is S 250.000.A. Thut not true*B. CMC Why do you think tn?2. — [,m luiiving （nr ShaMhxi iomnrrnw>A. HrinK n）e n prttMcnh11 Have a pIcASinnt inpfU Lei go out for a drink.3. Oh< Drnr | I* vc lost rny new which.A. 1'E and.R I h/H’ft nil right.G Whm n pity!•k I low about getting logrthrr for H movie tonight?— Wh/ii f i playing?A. I don't think so.Sure.C Never rnnid.5. — You1 ve Riven un a wondr：ful Chinenr clifinrr t Mrs Wnng.A. Pm glad you enjoyed it.K Ccmr ti^nin when you nrr freerC. h f s noi necessary （or you TO”y so> 二、调fl：WWtMit 30分，每小以2分）6-2018：阊读下面的句子,从A、B、C三个选项中选出一个能填入空白处的正确选顼，并将答案序号却在答题纸上.6. Sonn on< inveriicd fhr 31）pruifrr tunny yrurs ng（）9 I don11 rrniembrr who. A< sobutCL only7> Thry on trying to moke a new product- ihr worliTs nrnallesi robotsA. hammerII hinnuneC\ luntianoidK. Sa littleft bout chemistry tlt/it the lecture W&B completely beyond tne<A. did11 knowK 1 knewC. do I know9. I Ind I known the result • I you to tell m<?.A. would not A、kB・would not have “sikcdC had nol dtikvd10. 50 niilc» BOulhwrM of thr enuntry ihr UmoiJR hcnutlitil mnuninin, InyinKR lieC. lieMIL I hr wiEtifU Mpokr confidrntlyeiniprcascd mv rnoxhA> itviiK »o fhni「• which12. I hr C heciiih rt»ho< nindr by Ml I* juwUim CAM jump over hurdles while•A> if runningK running牝 be run1 w/i. A lntli hrnrrd ihnt it w«n my fit*! lime thril Ihhii my ro^rnrticMirgery.A. /R hadV. Wrt!*14. There nrcc«ll> (dr Inwrrwikcrs to consider copyright laws.A. increasingK increase(\ incrrn^nlE. I hr bnx inhdhl three lhingM>A. too smnll not to11 ton Rmull tn(\ <0 »tnnll tn16. Clever childrenknowledge M%ily.A. interestingfocusedG nbsorhvd17. Jm)t t behfVti thni romr ilh Mai trndurs onlyrnnkinn money<A< took enre of11 eared nbom(\ took cureIB. So fnr ns Pm• ^nrn<fc otlift urr inncrniMn vvould h«ve bvrn s«i^hctory.A. eancerning11 concerninR withC< cOUCrrnrdJ 9. Thr on inicrnnunn/il cconarnic problems mri in (irnrvn luat Mniiihy.A» reference11 inference(：. con(cr<jnc<?20. Thr company .n working prnlotypc on Srptrinlw r 3 m ii> annuulI rchnfilogy Innovnlioci (\jnfvrcnrc in Beijinp.A> concenirnird队demonntrAlcd(*. dinplnycd三.Mltft理解(共计招分,旬小规4分)21 — 2SBI：阅傅下列短文，从AM、C三个i&项中培出一个正确答案•并构答宝序号回在答J»峨上<.加WI好1My hem h a person who h・t» given me M mnnywho hua taught rnr nhouievery I hinge wnd whe han ^hown rnc how bcAiilifnl life is> And grnduAlly AM I «rt older nntl I grnw up»tny hrro hz nprriril my <^yr% io ihr fort that hfr ia not ^lw«y> brAUtiftil nnd hnppy like n (mrytnlcf hut lilt is much more than lhah My hern hnn rxphnnrd in rnv (hat life enn l>r vrry hard> Evrryonr niiiat sirux-h，hnnl to ronk( nil ihvir drcnnin ernnv Um: and to he n auccc«5ful prr30n<Mciyb<i t lircBuwc niy hrra liven JIO dour in rnr • I huvrn 1 < rr/tlixcd thut this pernfm hn« inspired so niuclu My only True hero 19 my mother. She WHS born in Jakarta • on thr I si of Ju!y> My motheris the youngest child in her family. She has two sisters, who always low and take care of bcr.Maybebecause of lhn\* she breoxnes a cheerful^ kind, friendly< and loveahie person She wants everybody io feel comfortable when they are around her.My mQthrr lik<;s to ju”dy and io read rvcryihingt from books to newspapers; Everyone really likes to talk and chol with hcr t so she has many friends. My mother believes all you need is to be a hard working person who olways wants to study hard, so thai you enn be a AUCXXS^U I pvrson. She 做ys tlisi many people Around her hsvc succeeded because they haw studied nnd worked bard-21. If a person wants to succeed in his lifts he •A< should listen to A fiurytnlt every clayB. must drcam o good dream every dayC has to work hard all liis life22. The underlined word M inspired f> in PnniRraph 2 may have ihc snme nitfftning HS •• ”.A. encouragedB・ showedCi cared23> I he writer f s mother becomes a loveable person because .A. bhr is the youngest in ihr familyB. her t wo sisters love her very muchC< she frch comfortable in her family2 I l-rotn ilir thirdWt c/m ndvr(4 删〉thut the wntvr.At in n fnrndly prrw)ri like his moihrrIV hn^ many 仆“ n山to hilk with(\ kn<Avs die inrnniiiM25. Which of tlw following is ihr h« liflc for the nading?A. Siurfy wdl|ik Whnl ii hrMiihlul I血！C My mother, my hetci,2G-3UJtt:请楸据短文内容判断靖出的俏旬是否正吮，正圳的写“T” .销谒的5TF”.并物答案写在答B8纸上。
《大学英语(四)0004》19春在线作业1答卷
B.after
C.before
D.that
答案:D
5.Peter worked so fast with the maths problems ______ a lot of mistakes.
A.as to make
B.that made
C.to make
D.that he made
A.that it necessary
B.necessary that
C.necessary of it that
D.it necessary that
答案:D
37.The young actor who had been thought highly of _________ to be a great disappointment.
答案:D
35.— I think he is a good lecturer. — _______
A.Yes. It's a good idea.
B.Sorry, it doesn't matter.
C.So do I.
D.I don't mind.
答案:C
36.We consider _______ the instrument be adjusted each time it is used.
答案:C
3.We’re using technology to _______ our levels of service.
A.enhance
B.extend
C.expand
D.amplify
答案:A
大工春《管理学》在线作业(Big work spring, management online homework )
大工10春《管理学》在线作业1（Big work 10 spring, managementonline homework 1）Big work 10 spring, "management" online homework 1Total score: 100 test time: - test scores: 100Multiple-choice questions, multiple-choice questions, judgment questionsFirst, radio questions (5 questions, 10 points) Score: 101., the management of human nature means ().A. management itself is a constantly changing and innovative social activityB. management is the skill and know-how of using these knowledge and skills flexibly on the basis of mastering certain theories and methodsIn the process of management, C. regards human as the center, and takes the initiative of understanding, respecting and mobilizing people. It regards people as the important objects of management and the most important resources of organizationD. organization is the carrier of management, and management is an essential activity to ensure the rational allocation of various elements in the organization and to achieve organizational goalsThe correct answer: C Full Score: 2 points: 22. the following statement about the procedure for planning work is wrong.A. the target is chosen to determine the expected outcome of the plan, while the prerequisite is to determine the future environment of the overall planning activityWhen evaluating alternatives, the B. should pay special attention to identifying the constraints or hidden dangers of each programC. is the key to decision makingThe first step in the D. program is to set goals for the entire opportunity, that is, the expected outcomes of the projectThe correct answer: C Full Score: 2 points: 23. in the following statement about the basic principles of modern management, the whole principle is ().A. modern efficient management must be clearly divided under the overall planning, and carry out effective synthesis on the basis of division of laborB. any management method within a system must form a continuous closed loop in order to form an effective management movement in order to absorb, process and operate freelyThe task of C.'s modern management is to establish a reasonable level of energy, so that the content of management is dynamically in the corresponding energy levelD. management must have a strong driving force, and only the right use of power in order to manage the movement continues and effectivelyThe correct answer: A Full Score: 2 points: 2FourThe following management thinkers in the early () on the basis of theory of Adam Smith's division of labor on issues related to professional systematically, put forward to professional skills as the basis of salary and bonuses, the advocates of the beneficial suggestion system, and give a different reward for useful suggestions.A. Adam SmithB. James StuartC. Robert OwenD. Charles BabbagThe correct answer: D Full Score: 2 points: 25., system theory is also called general system theory. It isa theory that describes things as a whole or system, and usesmathematical models to describe and establish the structure and behavior of systems. The origin of system theory is ().A. classical system view modern system view organism system theory general system theory system self organization theoryB. classical system view organism system theory modern system view general system theory system self organization theoryC. modern system view - classical system view - organism system theory - General System Theory - system self organization theoryD. classical system view modern system view organism system theory system self organization theory general system theoryThe correct answer: A Full Score: 2 points: 2Two, (a total of 20 multiple-choice questions, a total of 80 points.) Score: 80VOneThe following school of management theory belongs to the American management scientist, and Harold Kunz points out that the 11 school is ().A. contingency theory schoolB. group behavior schoolC. School of social technology systemsD.School of decision theoryThe correct answer: ABCD Full Score: 4 points: 42. in the following options, the development direction of cybernetics is ().A. develops toward information theoryB. permeate the highest level of human knowledge, form theoretical cybernetics, and enrich philosophical and philosophical methodsThe development of C. in the methodological level of science has gone through three stages: classical cybernetics, modern cybernetics and large system cyberneticsD. is permeated with each specific discipline, combine with it, form specific scientific methodThe correct answer: BCD Full Score: 4 points: 43. the following statement about the characteristics of planning work is correct.A. any manager has more or less the right and responsibility to make plansThe B. program is at the top of the management functionC. any organization or individual makes plans in order to achieve some goal effectivelyThe D. program always makes decisions about new problems that need to be solved and new changes and opportunities that may ariseThe correct answer: ABCD Full Score: 4 points: 44., the basic idea of system theory generally includes ().A. holistic thinkingB. relevance thoughtC. order thoughtD. dynamic thinkingThe correct answer: ABCD Full Score: 4 points: 45., enterprises undertake social responsibility, must comply with the following () and other norms of conduct.A. legal normsB. social normsC. ethicsD. policy specificationThe correct answer: ACD Full Score: 4 points: 46., there are several factors for enterprises to undertake and fulfill their social responsibilities.A. traditional economic modelB. expectations and requirements of the enterpriseC. social responsibility modelD. companies' attitudes and behavior patterns towards these expectations and requirementsThe correct answer: BD Full Score: 4 points: 47., comparative management from its establishment to date, in more than thirty years, generally experienced (and) several stages of development.A. rising stageB. low tide stageC. climax phaseD. Renaissance StageThe correct answer: ABC Full Score: 4 points: 48. in the planning work, the application of operational research methods include the following steps.A. turns the problem into a mathematical modelB. specifies an objective function as a criterion for comparing various possible motion scenariosC. determines the specific values of the parameters in the modelD. solves the model and finds the optimal solution that makes the objective function reach the maximum or minimumThe correct answer: ABCD Full Score: 4 points: 4The efficiency and quality of the 9. plan depend greatly on the method of planning adopted. Below are some major planning methods.A. rolling plan methodB. Gantt chartC. input output methodD. econometric methodsThe correct answer: ABCD Full Score: 4 points: 410., management science is a systematic study of the basic laws and general methods of management activities, which involves the following contents.A. productivity aspectsB. aspects of production relationsC. superstructureD. interpersonal relationshipsThe correct answer: ABC Full Score: 4 points: 411. what follows professor Harold Kunz's view is ().A. distinguishes management science from management practiceB. distinguishes the general management science from the enterprise function ScienceC. distinguishes management philosophy from environmental constraintsD.Distinguish management practices from non management practicesThe correct answer: ABD Full Score: 4 points: 412., according to the management's responsibilities and tasks, managers can be divided into ().A. decision makerB. function managerC. top managementD. decision staffThe correct answer: ABD Full Score: 4 points: 413. China's ancient management ideas, including the following () and so on.A. financial management ideasManagement ideas of B. tubesC. people oriented management thoughtD. organizational thinkingThe correct answer: ABCD Full Score: 4 points: 414. the following is a more representative model of comparative management.A. Taylor modelB., farmer Richman modelC. Nixigen - Staffin model.D. Koontz modelThe correct answer: BCD Full Score: 4 points: 415., in social life, we divide the environment related to the survival and development of individuals and organizations into categories.A. internal environmentB. external environmentC. natural environmentD. social environment.The correct answer: CD Full Score: 4 points: 416., how to evaluate western organizational behavior is a controversial issue, which is entirely wrong or totally wrong. Organizational behavior has important reference significance for us, mainly embodied in ().In the management thought of A., a considerable part of organizational behavior reflects the common requirements of modern mass productionB. organizational behavior has a "reasonable core" componentThe management measures and research methods provided by C. organizational behavior have more extensive reference valueThe theories and measures proposed by D. organizational behavior are based on the recognition and maintenance of private ownershipThe correct answer: ABC Full Score: 4 points: 417., research management hours, commonly used research methods, such as () and so on.A. methods of historical researchB. comparative research approachC. case analysisD. inductive deductive methodThe correct answer: ABCD Full Score: 4 points: 418., the following options, (), etc., are not Max Webb's contribution to management theory.A. differential piecework systemB. ideal administrative organization system theoryException rule in C. managementD. time study and standardizationThe correct answer: ACD Full Score: 4 points: 419. the following statement about the functions of management is correct ().The function of A. management is the function that managers must have in order to manage effectivelyWhat should B. managers do when they perform their duties?C. generally divides management functions into functions such as planning, organizing, leading and controllingThe function of D. management is an important condition to determine the existence and development of human social organizationsThe correct answer: ABC Full Score: 4 points: 4The different forms of the 20. plan are an important aspect of the diversity of the plan, and the following options belong to the form of the plan.A. ruleB. purposeC. strategyD. programThe correct answer: ABCD Full Score: 4 points: 4Three, the judgment question (altogether 5 test questions, altogether 10 points) Score: 10VOneThe external environment of an organization can be understood as the sum total of various conditions and factors that have direct or indirect effects on the activities of an organization.A. errorB. correctThe correct answer: B Full Score: 2 points: 2TwoThe importance of planning work is manifested in its positive impact on the work of the organization, can also have a negative impact, and even put the organization into serious difficulties.A. errorB. correctThe correct answer: B Full Score: 2 points: 23., the first step in planning work is to set goals for the entire opportunity, that is, the expected outcomes of the project.A. errorB. correctThe correct answer: B Full Score: 2 points: 24., the nature of management is twofold; on the one hand, management has the natural attributes associated with socialized production and productivity; on the other hand, it has social attributes directly related to production relations.A. errorB. correctThe correct answer: B Full Score: 2 points: 25. management refers to the activities of the managers in a certain organization, the use of certain functions and means to coordinate the activities of others, and to make others achieve the goals with their own efficiency.A. errorB. correctThe correct answer: B Full Score: 2 points: 2。
大连理工大学22春“公共课”《大学英语4》期末考试高频考点版(带答案)试卷号：2
大连理工大学22春“公共课”《大学英语4》期末考试高频考点版（带答案）一.综合考核(共50题)1.Judy Black, ____ is in charge of the clerical staff, is the Office manager.A.thatB.whoC.whomD.both a and b参考答案：B2.She listened careful and set down every word he said.A.正确B.错误参考答案：B3.It was not until she learned her son had been admitted to the elementary school.()A.正确B.错误参考答案：A4.Many Chinese airlines allow passengers to use their smart phones during the flight.()A.正确B.错误参考答案：A5.B.is losingC.has lostD.is lost参考答案：D6.What to do next will be discussed at the next meeting.A.正确B.错误参考答案：A7.If he change twice, he will be lost.()A.正确B.错误参考答案：B8.He made full use of his time to learn English.A.正确B.错误参考答案：A9.Mr. Hall () his childhood in his hometown.A.spentB.costC.tookD.had参考答案：AThe children () many times not to play with fire.A.toldB.have toldC.have been toldD.are being told参考答案：C11.He said that I had stolen his bicycle, but I () it.A.demonstratedB.demandedC.declinedD.denied参考答案：D12.Vicky, () born in China, lived and practiced law in public.A.wasB.he wasC.althoughD.who he was参考答案：A13.If you carry on working like this, you will () sooner or later.A.give offB.get downC.break downD.hold on参考答案：C14.This kind of grass grows very well ____ it is warm.C.in the place whichD.where参考答案：D15.() the poem a second time, the meaning will become clearer to you.A.You having readB.While readingC.When you readD.If reading参考答案：C16.() was known to them all that Bob had broken his promise () he would give them a rise.A.As; whichB.What; thatC.It; thatD.It; which参考答案：C17.Jack () yet last night, otherwise he () me.A.mustn't have arrived; must have phonedB.can't have arrived; would have phonedC.may have arrived; need have phonedD.shouldn't have arrived; can have phoned参考答案：B18.The shop offers almost everything which ranges from inexpensive to very expensive.A.正确B.错误19.-What's the old man standing there? -He is (), a new comer.A.Mr.WhiteB.an engineerC.JoeD.Joe's brother参考答案：B20.The price of gold rose again, partly () news about the war.A.resultB.go withC.becauseD.due to参考答案：D21.Do you know the difficulty he had the workA.on finishingB.to finishC.finishingD.have finished参考答案：C22.We will spare no efforts to provide more ___________ products to our customers.petitivepetepetedpetition参考答案：ANot only the burden of work and life, but also the sudden second child is what makes the today's younger generation feel exhausted.()A.正确B.错误参考答案：A24.Much as we would like to close the business with you, we find your bid unacceptable.()A.正确B.错误参考答案：A25.-You must call them every week. -Yes, I ().A.mustB.shouldC.have toD.will参考答案：D26.Traveling in the desert by camel are really an unforgettable experience.A.正确B.错误参考答案：B27.Zhao is taking an interview in the meeting room on the third floor.()A.正确B.错误参考答案：A() we call the First Aid Centre, the doctors () by and by.A.No sooner; would comeB.Soon after; would comeC.Shortly; are comingD.Immediately; will come参考答案：D29.Would you let us have your most favourable firm offers of January, 2009 for 10000 pair of men's leather shoes.()A.正确B.错误参考答案：A30.This is the first time that I_________ at the meeting.A.had spokenB.have spokenC.amD.was参考答案：B31.The shop assistant helped him ____ the necklace.A.haveB.dressingC.try onD.weared参考答案：C32.Our teachers made us ________a lot of homework after school.D.to have done参考答案：C33.The letter is ____ for me.A.much too importanceB.much importanceC.too importantD.too much important参考答案：C34.A foreigner is involved in the translation work in such important conference in China.()A.正确B.错误参考答案：A35.Last year my brother and I stayed ____ a week ____ some friends in Boston.A.for...andB.for...withC.till...withD.when...without参考答案：B36.All the things we are doing now are for the service we offer for the society in the future, so these efforts are worth pay.()A.正确B.错误参考答案：B37.Considering the long-standing business relationship between us, we shall grant you a specially discount of 10%.()A.正确B.错误参考答案：B38.His spare time is usually spent ____ the old.A.helpingB.helpC.to helpD.helps参考答案：A39.He ____ to get to the station in time, but every seat had been taken.A.tryB.succeededC.managedD.is able to参考答案：C40.People adopt effective measures to protect wild animals.A.正确B.错误参考答案：A41.They had become good friend ____ I wanted to introduce them to each other.A.before longD.soon after参考答案：B42.It will be quite a long time () she is back again, so don't be too cross with her.A.thatB.sinceC.beforeD.until参考答案：C43.We like the oil painting better, () we looked at it.A.asB.whileC.the momentD.the more参考答案：C44.How can you keep the machine () when you are away?A.runB.to runC.runningD.being run参考答案：C45.It helps children learn how to deal with the problems they may meet in really life.()A.正确B.错误参考答案：B46.He ____ and couldn't find the way to the hotel.A.puzzledB.was puzzledC.puzzlingD.has puzzled参考答案：B47.He left the meeting-room with his secretary, full of ____.A.happyB.sadC.angerD.tear参考答案：C48.The lecture had been over. The students ____ in the hall asking the professor for advice.A.continuedB.remainedC.keepD.stay参考答案：B49.The boy is quite tall ____ his age.A.forB.toC.byD.at参考答案：A50.He said that he will arrive the next week.A.正确B.错误参考答案：B。
大工21春《大学英语3》在线测试23
大工21春《大学英语3》在线测试23一、阅读理解阅读理解1在陶瓷制品的制作过程中，人们通常采用两种不同的技术：传统技术和现代技术。
传统技术的特点是：（1）完全依赖手工操作，手工技艺要求非常高；（2）成本较高，因为制作过程中可能会出现很多失败品；（3）生产周期较长，因为手工制作较为耗时。
现代技术则利用机器设备进行制作，具有以下特点：（1）生产效率高，比传统技术更快速；（2）成本相对较低，因为机器设备可以减少失败品的产生；（3）制作精度较高，机器的操作可以使产品更加精确。
正因为现代技术的优势，现在很多陶瓷制品都是用机器设备进行制作的。
然而，还有一些人坚持使用传统技术来制作陶瓷制品，他们认为传统技术制作出来的产品更具艺术价值。
阅读理解2马拉松是一项极具挑战性的长跑比赛，距离为42.195公里。
目前，马拉松比赛已经成为全球范围内的重要体育赛事，吸引了很多跑步爱好者参与其中。
参加马拉松比赛需要具备一定的身体素质和准备工作。
首先，跑步者需要有良好的体能和耐力，能够坚持长时间的跑步。
其次，跑步者需要进行充分的训练，包括定期的跑步训练以及其他相关训练，如力量训练和柔韧性训练。
此外，跑步者还需要合理安排饮食，保证身体获得足够的能量。
最后，跑步者需要具备心理素质，能够克服困难和挑战，在比赛过程中保持积极的态度。
对于参加马拉松比赛的跑步爱好者来说，完成比赛是一个巨大的成就。
无论是为了健康还是为了挑战自我，马拉松比赛都是一个很好的选择。
二、写作写作题目：My Hometown题目要求：请以My Hometown为题，写一篇关于你家乡的文章。
My Hometown我出生并长大在一个美丽的小镇，名叫阳光城。
阳光城是一个风景如画的地方，拥有优美的自然环境和丰富的人文历史。
首先，阳光城位于一个山区，四周环绕着青山绿水。
我家所在的地方有一片美丽的湖泊，湖水清澈见底，周围种满了各种花草树木，形成了一个天然的风景区。
每当清晨，阳光从山上透过树叶洒在湖面上，景色格外宜人。
大连理工大学22春“电力系统自动化技术”《电源技术》作业考核题库高频考点版(参考答案)试题号1
大连理工大学22春“电力系统自动化技术”《电源技术》作业考核题库高频考点版（参考答案）一.综合考核(共50题)1.单相桥式整流电路中，输出平均电压Uo为U2的()倍。
A.0.45B.0.9C.2D.2.7参考答案：B2.单相桥式逆变电路按其工作方式可分为()。
A.异频逆变电路B.同频逆变电路C.单频逆变电路D.倍频逆变电路参考答案：BD3.UPS具有下列哪些作用?()A.停电保护B.波形失真处理C.电压稳定D.高低电压保护参考答案：ABCD4.下列哪项是半控制器件?()A.快速恢复二极管B.晶闸管C.MOSFETD.IGBT5.开关电源的开关电路中最常用的调制方式是()。
A.PWMB.PFMC.混合型D.以上都没有参考答案：A6.将串联稳压电源和保护电路集成在一起就是集成稳压器。
()A.正确B.错误参考答案：A7.变频器对其自身的保护功能有下列哪些内容?()A.瞬时过电流保护B.对地短路保护C.过电压保护D.欠电压保护参考答案：ABCD8.电子设备对电源有哪些要求?()A.体积小B.重量轻C.效率高D.电源输出不间断参考答案：ABCDA.稳压系数B.电压调整率C.输出电阻D.电流调整率参考答案：ABCD10.对于双极型晶体管来说，功率MOSFET的速度并不够快。
()A.错误B.正确参考答案：A11.在线式UPS多采用()。
A.单相桥式整流电路B.单相桥式逆变电路C.三相桥式整流电路D.三相桥式逆变电路参考答案：B12.串联谐振式稳压电源的基本原理是()串联谐振。
A.LCB.LRC.RCD.LRC参考答案：A13.稳压二极管稳压电路输出电流较小，且输出电压不可调。
()A.错误B.正确14.设计0-100W开关电源的主电路时，一般选用()。
A.正激型电路B.反激型电路C.半桥型电路D.全桥型电路参考答案：B15.在实际的小型UPS中，常用用比较器组成的正弦脉宽调制电路来实现脉宽调制的目的。
()A.错误B.正确参考答案：B16.单端反激式电路工作于电流连续模式时，变压器磁芯的利用率会显著下降。
奥鹏教育-大连理工大学2012春大学英语3-在线作业答案
Aohao de ,hao 一、单选题（共 20 道试题，共 80 分。
）V1. It is not an ________ method to learn a language by focusing on a large vocabulary only.A. effectB. affectionateC. efficientD. affected满分：4 分2. Although he failed in his attempts, his mother's __________ drove him on to continue hisefforts.A. motivationB. encouragementC. intentionD. compulsion满分：4 分3. Since this road is wet and slippery this morning, it _________ last night.A. must rainB. was rainingC. must have rainedD. may rain满分：4 分4. Coal was formed out of dead forests by a long and slow _______ of chemical change.A. pressB. procedureC. successD. process满分：4 分5. They got a ________ result, and they were wild with joy.A. magicB. magicianC. magneticD. magical满分：4 分6. It's important for you to make a list of your tasks in order of _______ when you work on aproject.A. suggestionB. goalC. priorityD. tip满分：4 分7. His words are _________ but the meaning is deep.A. fewB. a fewC. littleD. a little满分：4 分8. He had often dreamed of retiring in England and had planned to ________ down in thecountry.A. breakB. comeC. putD. settle满分：4 分9. The young ________ interested in pop music.A. isB. haveC. hasD. are满分：4 分10. He is not a child __________.A. no moreB. no longerC. any muchD. any more满分：4 分11. His salary as a driver is much higher than __________.A. a porterB. is a porterC. that of a porterD. as a porter满分：4 分12. I don't know ________ to deal with such matter.A. whatB. howC. whichD. /满分：4 分13. We all know that there are ________ ways of getting to know a person.A. varyingB. varietyC. variousD. various of满分：4 分14. We often see Henry ________ English aloud every morning in the classroom.A. readB. readsC. readingD. to read满分：4 分15. Tom was once cheated by his friend; ________ he would not trust anyone.A. henceB. sinceC. neverthelessD. however满分：4 分16. From a practical point of ________, it isn't a good place to live. It is crowded and heavilypolluted.A. viewB. lookC. opinionD. value满分：4 分17. How much has the company ________ this year?A. brought inB. brought downC. brought outD. brought about满分：4 分18. Success is not won ________. It takes patience, diligence and continuing efforts.A. twilightB. attentivelyC. currentlyD. overnight满分：4 分19. The bridge was named _______ the hero who gave his life for the cause of the people.A. afterB. forC. because ofD. before满分：4 分20. In 1958 Marian Anderson ________ her country as a United Nations delegate.A. servedB. was servedC. to serveD. serving满分：4 分D. led满分：4 分2. Why not ______ your teacher for help when you can’t finish ______ it by yourself?A. ask; writeB. to ask; writingC. ask; writingD. asking; write满分：4 分3. _________ these honors, he received a sum of money.A. ExceptB. ButC. BesidesD. Outside满分：4 分4. I like the teacher _______ classes are very interesting and creative.A. whichB. whoC. whatD. whose满分：4 分5. It's _______ to interrupt the others while they are talking.A. roughB. rudeC. politeD. troublesome满分：4 分6. _______ the War of Independence, the United States was an English colony.A. BeforeB. AtC. InD. Between满分：4 分7. I won't be able to attend the meeting tonight because __________.A. I must teach a classB. I teach a classC. I will be teaching a classD. I will have been teaching a class满分：4 分8. Even people of great wisdom find it hard to settle a family quarrel. You'd better not get_________ in the affairs of the couple.A. readyB. businessC. involvedD. busy满分：4 分9. I won’t be free _________ I finish this work.A. afterB. untilC. butD. when满分：4 分10. One day while Mr. King was working, he had a/an ________ and his left leg was badlyinjured.A. businessB. accidentC. matterD. event满分：4 分11. Scientists say it may be five or ten years _______ it is possible to test this medicine onhuman patients.A. sinceB. beforeC. afterD. when满分：4 分12. Though we have made enough preparation, we still _________ that we will meet a certainamount of resistance to our plan.A. promiseB. anticipateC. lookD. call满分：4 分13. The population of the world _______ still _______ now.A. has; grownB. is; growingC. will; growD. is; grown满分：4 分14. It’s cold outside. You’d better _______ your coat.A. wearB. dressC. put onD. in满分：4 分15. She ________ the joy of writing children's stories and finally decided to devote herself toit.A. inventedB. discoveredC. foundedD. revealed满分：4 分16. I fell and hurt myself while I _______ football yesterday.A. was playingB. am playingC. playD. played满分：4 分17. Some people only ________ their sorrows with their friends.A. partB. shareC. divisionD. portion满分：4 分18. He was filled with fear at the bad news that staff over 40 years old might get laid_________.A. offB. downC. out一、单选题（共 20 道试题，共 80 分。
大学英语(c)在线作业答案
1.《长沮桀溺耦而耕》文中,夫子怃然曰：“鸟兽不可与同群，吾非斯人之徒与而谁与？天下有道，丘不与易也。
”孔子所说“斯人”是指（）。
A 桀溺B 子路C 世人D 自己正确答案:C2.《组织管理的技术——系统工程》是一篇宏观性质的科普作品，不像科学小品，可从科学现象点滴生发开去；也不能如科幻作品，展开幻想翅膀高飞。
它既有严格的科学性，用准确、通俗的文字高度概括地介绍系统工程的知识；又深入浅出，（），寓繁于简，以鲜明的观点、丰富的内容、醒目的标题豁人耳目，使外行乐意领教。
A 小题大做B 以一总万C 大题小做D 另辟蹊径正确答案:C3.“康桥”也就是我们今天所译的“剑桥”，英国剑桥大学所在地。
康桥象征诗人对“爱”、“美”、“自由”的单纯信仰,对青春的留恋,对理想的执着,是人生中最美好的青春梦幻之地。
康桥求学是徐志摩人生中最美丽的一段时光，其时他对诗歌发生浓厚的兴趣，走上文学的道路。
重返故地，牵引起他无数关于青春、理想、还有对过去飘逸洒脱生活方式的甜蜜回忆。
诗中重墨浓彩写的是（）。
A 对青春的留恋B 对理想的执着C 大学学习生活D 康河景观正确答案:D4.韩愈（768－824）字退之，河内河阳人（今河南省孟县）。
韩氏自称郡望昌黎，每自称韩昌黎，故后世称他为韩昌黎。
他倡导了古文运动，其文遒劲有力，条理畅达，语言精炼，各体兼长，为古代杰出散文家,位列“唐宋（）”之首。
A 名家名人B 散文家C 八大家D 古文家正确答案:C5.《饮食男女》是李安父亲三部曲（《推手》和《喜宴》）中的最后一部。
和前两部一样，李安在这部电影中展现的仍然是中国传统与现代撞击中的（）家庭生活细节。
李安对家庭剧有着明显的偏爱，这大概源于他自己独特的对于家庭的感受，很善于从小处见大，从看似简单的家庭情节剧中挖掘出深刻的精神内涵。
在《饮食男女》这部影片里，李安没有把三个女儿简单地设置老朱的对立面，而是通过一个个生动的细节，将三个女儿的个性都表现出来了。
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《电力电子技术》在线作业1
单选题
1、C
2、C
3、A
4、C
5、D
6、B
多选题
1、ABCD
2、ABCD
3、ABCD
4、AC
5、ABCD
6、ABCD 判断题
1、B
2、A
3、B
4、A
5、B
6、B
7、A
8、A
《电力电子技术》在线作业2
单选题
1、A
2、C
3、D
4、C
5、D
6、B
多选题
1、AD
2、ABCD
3、ABD
4、ABCD
5、ABCD
6、AB
判断题
1、A
2、B
3、A
4、B
5、B
6、B
7、A
8、A
电力电子技术》在线作业3
单选题
1、B
2、B
3、C
4、B
5、C
6、D
多选题
1、CD
2、BCD
3、ABCD
4、CD
5、AD
6、BD
判断题
1、B
2、B
3、B
4、A
5、B
6、B
7、B
8、A
大工12春《大学英语4》在线测试
在线作业一
一BCDCD AACCD CBADB CDBBA
二ABABA AABBB
在线作业二
一ACDDD BBCAB ACABB ACCAC
二BABAA AABAA
在线作业三
一ACCAC ABCAA CABAD ACBBA
二BBBBB AAAAA
大工12春《管理学》在线作业
在线作业1
单选题 1. B 2. A 3. A 4. C 5. B
多选题 1. CDE 2. ABCDE 3. ABCDE 4. BCD 5. ABCD
6. BCD
7. BCD
8. ABCDE
9. ABCDE 10. ABCDE 判断题 1. B 2. B 3. B 4. B 5. A
在线作业2
单选题 1. D 2. C 3. A 4. B 5. B
多选题 1. ABCD 2. ABE 3. ABC 4. ABCDE 5. ABCDE
6. ACDE
7. ABE
8. ABCDE
9. ACE 10. ABCDE
判断题 1. B 2. A 3. B 4. A 5. B
在线作业3
单选题 1. A 2. C 3. B 4. D 5. D
多选题1ABC 2. ABCDE 3. ABCE 4. AB 5. BCDE
6. ABCDE
7. ABDE
8. ABCDE
9. ABCDE 10. ABC 判断题 1. A 2. A 3. B 4. A 5. A
大工12春《经济学》在线作业
在线作业一
一ABBCC
二ACE BD BCE DE ABC
三ABAAB AAAAB
在线作业二
一BADDC
二CDE BCDE ABC ACE ABCDE
三ABBBA AAABB
在线作业三
一BADAB
二CDE ABE ABCD BCD BCDE
三ABBAA ABABB。