What is static electricity

去除静电英语Removing Static ElectricityStatic electricity is a common phenomenon that many of us encounter in our daily lives. It can be a nuisance, causing our hair to stand on end, clothes to cling, and even a painful shock when we touch a metal surface. However, understanding the nature of static electricity and learning effective ways to manage it can help us minimize its inconveniences and even take advantage of its benefits.At its core, static electricity is the result of an imbalance of electric charges on the surface of an object. When two materials with different electrical properties come into contact and then separate, some of the electrons from one material may transfer to the other, leaving one material with a positive charge and the other with a negative charge. This charge imbalance is what creates the static electricity we experience.One of the primary causes of static electricity buildup is the low humidity in our environments. Dry air, often found in heated or air-conditioned spaces, provides less moisture for the electrons to move freely, making it easier for them to accumulate on surfaces. This canbe particularly problematic during the winter months when heating systems are in use, or in arid climates where humidity levels are naturally low.To effectively remove static electricity, it's important to address the root cause of the problem – the charge imbalance. There are several strategies that can be employed to achieve this:Increase Humidity: Increasing the moisture content in the air can help neutralize the static charge by providing more conductive particles for the electrons to move through. This can be done by using a humidifier, opening windows to allow in outside air, or even placing bowls of water around the room.Use Antistatic Sprays or Lotions: Antistatic sprays and lotions contain substances that help to neutralize the static charge on surfaces. These products can be applied to clothing, furniture, and other materials to reduce the buildup of static electricity.Discharge Static Electricity: When encountering a static charge, it's important to discharge it safely. This can be done by touching a grounded metal object, such as a door knob or a metal desk, which will allow the excess charge to dissipate harmlessly.Avoid Synthetic Fabrics: Synthetic materials, such as polyester andnylon, are more prone to static electricity buildup than natural fibers like cotton or wool. Opting for clothing made from natural materials can help reduce the static charge.Use Dryer Sheets: Placing a dryer sheet in the clothes dryer can help to reduce static cling on clothing. The antistatic agents in the sheets help to neutralize the charges.Maintain Proper Grounding: Ensuring that electrical equipment and devices are properly grounded can help to dissipate static electricity before it can build up and cause problems.While static electricity can be a nuisance, it also has some practical applications. For example, it is used in photocopiers and laser printers to attract toner particles to the paper, and in air filtration systems to capture particulate matter. Additionally, static electricity can be harnessed to generate small amounts of electricity, as seen in some types of renewable energy technologies.In conclusion, understanding the nature of static electricity and implementing effective strategies to manage it can help us minimize its inconveniences and even take advantage of its benefits. By increasing humidity, using antistatic products, discharging static charges safely, and choosing natural fabrics, we can create a more comfortable and less static-prone environment.。

实用英语：“没电了”用英语怎么说我们生活和工作的每时每刻都离不了电，但是生活中总有难免意外停电的时候，这次我们就来看看关于电的地道英语表达。

1.The power is off. 停电了。

"The power is off."、"The power is gone."或是"There is a power outage."，这三句都是停电了。

其中的分别是前二句为比较口语的说法，例如看到电灯突然熄掉了，老美的第一个反应就是 "Oh! The power is gone."或是"The power is off."，而第三句的power outage 则是用在比较正式的场合上，例如社区公告明天下午一点到五点要停电，他们会说"There will be a power outage from 1pm to 5pm tomorrow."注意一下，一般我们想到“电”都会很自然地想到electricity这个字，但这个字在使用上比较局限于正式的场合。

比方说你新搬到一间公寓，电还没接上，你就可以提醒房东说"There is no electricity in my house."。

但是在日常生活当中遇到的大多数情况都是用power而非electricity。

比方说请把电关了，比较常听到的是"Please turn off the power."而不是"Please turn off the electricity."。

再来还有一些常把electricity和power搞混的地方。

比方像发电厂是power plant而非electricity plant，电线是power line而非electricity line。

另外“电力”有一个比较俚语的讲法，叫juice。

防静电吨桶原理Static electricity can be a common issue in many industries, especially when it comes to handling materials that are prone to generating static charges. 静电在许多企业中是一个常见问题，特别是在处理易产生静电的材料时。

One common solution to this problem is the use of anti-static drum. 一个常见的解决办法是使用防静电吨桶。

The principle behind anti-static drum is to provide a safe and effective way to store and transport materials that are prone to generating static charges. 防静电吨桶的原理是提供一种安全有效的方式来储存和运输易产生静电的材料。

These drums are usually made of special conductive materials that help to dissipate any static charges that may accumulate on the surface of the drum. 这些吨桶通常由特殊导电材料制成，有助于消散在桶表面可能积聚的任何静电。

In addition to the materials used, the design of the drum also plays a crucial role in preventing static buildup. 除了使用的材料外，吨桶的设计也在防止静电积聚中起着至关重要的作用。

The shape and structure of the drum are carefully engineered to minimize the potential for static charge generation and accumulation. 吨桶的形状和结构经过精心设计，以最大程度地减少静电产生和积聚的可能性。

考研一英语作文写通知史密斯教授Dear Professor Smith,Hi! My name is Timmy and I'm 8 years old. I'm writing to tell you about something really cool that happened at my school last week. We had a Science Fair and it was the best day ever!It all started a few months ago when our teacher, Miss Johnson, told us we were going to have a Science Fair. She said we could work by ourselves or in groups to come up with a science project to present. I was so excited! I love science and doing experiments.At first, I didn't know what kind of project to do. There are so many cool things in science! My friend Billy wanted to do a volcano, but I've seen that a million times. My other friend Samantha wanted to make a baking soda and vinegar rocket, but that seemed kind of boring to me.Then one day, I was watching TV and saw this really neat show about static electricity. They were making people's hair stand up straight by rubbing balloons on their heads! I thought that looked like a lot of fun, so I decided to do my project on static electricity.I spent weeks reading books from the library and watching videos online to learn all about it. Did you know that static electricity happens when two surfaces rub against each other and electrons get transferred from one to the other? It's so fascinating!For my project, I decided to do some experiments to show how static electricity works. I made this cool thing called an electroscope, which is like a aluminum can with a lid and a piece of thin metal strip hanging down inside. When you charge it up with static electricity, the metal strip moves!I also did an experiment where I charged up a balloon by rubbing it on my hair, and then used the charged balloon to pick up pieces of paper and make them stick to the wall. It was so awesome seeing the power of static electricity in action!The best part was on the day of the Science Fair. I set up my project display with all my notes and pictures explaining static electricity. I had my electroscope and the materials for the balloon experiment ready to go.When people came by my booth, I gave them the full spiel about what static electricity is and how it works. Then I did the cool demonstrations for them and let them try the experiments themselves! Everybody loved it, even the parents.The judges seemed really impressed too. They asked me lots of questions about static electricity and I knew all the answers from studying so much. I could barely contain my excitement when they announced that I won first place in the Science Fair! Can you believe it?They gave me this huge trophy that's taller than me and a special science book as a prize. I was bouncing off the walls, I was so happy and proud of myself. My mom and dad were cheering like crazy!Miss Johnson said my project and presentation were "exemplary" which I think is a good thing. She told me I have a bright future as a scientist if I keep working hard. I'm definitely going to keep exploring all the amazing things science has to offer.Anyway, that's the story of my Science Fair project on static electricity. I learned so much through researching and experimenting. It was the coolest experience ever! I can't wait for next year's Science Fair so I can dive into another fascinating science topic.Thanks for taking the time to read my letter, Professor Smith.I know you're a big important scientist, so it means a lot thatyou'd listen to what a kid like me has to say. I hope you have a zaptastic day!Your friend,Timmy。

electricity的用法文档标题：Electricity的用法详解一、Electricity的基本概念与用途Electricity，中文译为“电”，是一种自然现象，表现为静止或移动的电荷产生的物理效应。

它是现代生活和工业生产中不可或缺的能量形式，广泛应用于照明、加热、动力驱动、通信、计算等多个领域。

二、Electricity的名词用法1. 在科学论述和日常对话中，“electricity”通常作为不可数名词使用，例如： - "Electricity is a fundamental part of our modern lives."（电是现代生活的基本组成部分。

）- "The invention of electricity revolutionized the world."（电的发明改变了世界。

）2. 当表示不同类型的电流或电力供应时，electricity可以与形容词组合，如"mains electricity"（交流电）, "static electricity"（静电）, "solar electricity"（太阳能电力）等。

三、Electricity的动词用法在某些语境下，“electrify”或“electrically”是从electricity派生出的动词形式：1. Electrify：意为“使通电；使电气化；使震惊”。

例如：- "The city plans to electrify its bus fleet to reduce carbon emissions."（该城市计划将其公交车队电气化以减少碳排放。

）2. Electrically：作为副词，表示通过电力或以电的方式进行操作或驱动。

例如：- "This device is electrically powered."（这个装置是由电力驱动的。

选词填空Directions:Fill in the blanks with the words given below. Change the form where necessary. [题数：10；分数：10分；参考时间：10分0秒]Passage 1image concerned attractive belongings definestatement fascination despite necessity item1. Company loyalty made him turn down many [1] 【√参考答案：attractive】 job offers.2. Miller's [2] 【√参考答案：fascination】 with medieval art dates from her childhood.3. His [3] 【√参考答案：statement】 that he had nothing to do with the affair was greeted with some suspicion.4. There are good novelists, [4] 【√参考答案：despite】 the terrible flood of bad novels and poor work.5. The shops are well stocked with food, clothing and other consumer[5] 【√参考答案：items】.6. Something is worrying me, but I can't [6] 【√参考答案：define】exactly what it is.7. She had a clear [7] 【√参考答案：image】 of how she would look in twenty years' time.8. The agency is more [8] 【√参考答案：concerned】 with making arty ads than understanding its clients (客户).9. The dead soldier was identified only by his uniform and personal [9] 【√参考答案：belongings】.10. Food and clothing are the bare [10] 【√参考答案：necessities】of life.Directions:Complete the following sentences with phrases or expressions from the passage. [题数：6；分数：6分；参考时间：6分0秒]Passage 2.This meeting gives us a chance to [11] 【√参考答案：step back】and have a good look at our problem..The actress really hated to play the sweet passive women that audiences [12] 【√参考答案：identified】 her [13] 【√参考答案：with】..I just love the fun of [14] 【√参考答案：dressing up】 in different clothes for different occasions..For advice, they [15] 【√参考答案：turned to/looked to】 one of the school's most experienced teachers..The central services of the BBC [16] 【√参考答案：feed off】 the local stations to some extent.Directions:Fill in the blanks with the words given below. Change the form where necessary.[题数：10；分数：10分；参考时间：10分0秒]Passage 3abuse inspire concerning estimate economicdistribute motivate measurable maximize individual1. We gave up the house, because of [17] 【√参考答案：economic】considerations.2. The value of the painting was [18] 【×参考答案：estimated】at several thousand dollars.3. The new tax will not have any [19] 【√参考答案：measurable】impact on the lives of most people.4. I was greatly [20] 【×参考答案：inspired】 to work hard by her example.5. The company's main function is to [21] 【√参考答案：maximize】profit.6. The profit-sharing plan is designed to [22] 【√参考答案：motivate】 the staff to work hard.7. The rights of the [23] 【√参考答案：individual】 are perhaps the most important rights in a free society.8. Thousands of soldiers are working to [24] 【√参考答案：distribute】 food and blankets to the refugees.9. Police are anxious to hear any information [25] 【√参考答案：concerning】 the suspect's whereabouts.10. Drug and alcohol [26] 【×参考答案：abuse】 contributed to Brian's early death.Directions:Complete the following sentences with phrases or expressions from the passage. Change the form where necessary. [题数：6；分数：3分；参考时间：6分0秒]Passage 4.Although it's a big company, the director knows all the staff [27] 【√参考答案：by name】..The doctor saw [28] 【√参考答案：at a glance】 that the child had got the measles (麻疹)?.He wants to buy a house, and is saving money [29] 【√参考答案：to that end】..I'm ready to decide, but I can't [30] 【√参考答案：speak for】my colleagues..The police had to [31] 【√参考答案：take】 firm [32] 【√参考答案：action】 to deal with the riots.阅读理解Directions:There are four passages in thispart. Each passage is followed by somequestions or unfinished statements. For eachof them there are four choices marked A, B, Cand D. You should decide on the bestchoicer.[题数：10；分数：20分；参考时间：20分0秒]Passage 1One silly question I simply can't understand is "How do you feel?" Usually the question is asked of a man in action a man walking along the street, orbusily working at his desk. So what do you expect himto say? He'll probably say, "Fine, I am all right."But you've put a bug in his ear —maybe now he is notsure. If you are a good friend, you may have seensomething in his face, or his walk, that he overlookedthat morning. It starts him worrying a little. Firstthing, you know, he looks in a mirror to see ifeverything is all right, while you go merrily on yourway asking someone else. "How do you feel?" Everyquestion has its time and place. It's perfectlyacceptable, for instance, to ask, " How do you feel?"if you are visiting a very close friend in thehospital. But if the fellow is walking on both legs,hurrying to catch a train, or sitting at his deskworking, it's not time to ask him that silly question.When George Bernard Shaw, the famous writer of playswas in his eighties, someone asked him "How do youfeel" Shaw put him in his place, "When you reach my age," he said, "either you feel all right or you are dead."√ 33. Accordingto the writer,the greeting "Howdo you feel?" ____. [A] usuallymakes one feeluneasy.[B] is a goodway to makefriends[C] is proper toask a man inaction[D] shows one'sconsiderationfor other people【参考答案】：A【干扰项】：C （有7.00%的学生选择了该选项）√ 34. "You've put a bug in his ear " means that you've ____. [A] hurt him [B] embarrassedhim[C] given him some kind of warning[D] shown concern for him.【参考答案】：C 【干扰项】：D（有5.00%的学生选择了该选项）√ 35. The question "How do you feel?" seems to be suitable when asked of____.[A] a man walking in the street[B] a friend who has fallen ill [C] a person having lost a close friend [D] a stranger who looks worried 【参考答案】：B【干扰项】：该题没有学生选择了错误答案！√ 36. George Bernard Shaw's reply to this question shows ____.[A] he is cheerful[B] he is humorous[C] he is capable[D] he is polite 【参考答案】：B 【干扰项】：C（有10.00%的学生选择了该选项）√ 37. This passage can be entitled ____ [A] A Good Greeting[B] George Bernard Shaw'sOpinion. [C] Don't Bother a Busy Man [D] A Misplace Question 【参考答案】：D 【干扰项】：A （有12.00%的学生选择了该选项）Passage 2The sense of sound is one of our most important means of knowing what is going on around us. Sound has a wasted product, too, in the form of noise. Noise has been called unwanted sound. Noise is growing and it may get much worse before it gets any better. Scientists, for several years, have been studying how noise affects people and animals. They are surprised by what they have learned. Peace and quiet is becoming harder to find. Noise pollution is a threat that should be looked at carefully. There is saying about it, "being so noisy that you can't hear yourself think." Doctors who studynoise believe that we must sometimes hear ourselvesthink. If we don't, we may have headaches, other achesand pains, or even worse mental problems. Noise adds√ 38. Why are scientists surprised by the findings in their noise study?____ [A] Because the world is becoming more and more noisy. [B] Becausethey havelearned thatnoise is also amore tension (紧张) to a society that already faces enough stress. But noise is not a new problem. In ancient Rome, people complained so much about noise that the government stopped chariots (轻便四轮马车) from moving through the streets at night. Ways of making less noise are now being tested. There are even laws controlling noise. We can't return to the "good old days" of peace and quiet. But we can reduce noise - if we shout loudly enough about it.kind of pollution. [C] Because noise is an unwanted waste for human beings [D] Because people knew little about the danger of noise before. 【参考答案】：A 【干扰项】：B （有2.00%的学生选择了该选项）√ 39. What maybe the result if we cannot hear ourselves think?____ [A] We may forget what we have thought about. [B] Our thoughts may beinterfered. [C] our mind may be harmed.[D] We may have difficulty using the right word.【参考答案】：C 【干扰项】：该题没有学生选择了错误答案！√ 40. When the writer says we cannot return to the "good old days", he means that ____. [A] our society is becoming much worse than before.[B] in our modern society it is hard to lead a quiet life.[C] the old days is much happier than the present time.[D] it is impossible for us to deal with noise as we did before.【参考答案】：B 【干扰项】：A（有5.00%的学生选择了该选项）√ 41. From the last sentence of the passage we can learn that ____. [A] we can put noise under control if our measures are effective.[B] sometimes we have to shout loudly so thatothers can hear us.[C] shouting is a chief cause of noise pollution. [D] it is important to warn people of the danger of noise pollution.【参考答案】：D 【干扰项】：B（有5.00%的学生选择了该选项）√ 42. Which of the following is TRUE according to thepassage?____ [A] Only recently did people realize the harmfulness of noise.[B] Noisepollution isthe worst kindof pollution wesuffer from.[C] People arenow trying tofind ways tomake noise aslow aspossible.[D] The writerthinks that itis almostimpossible forpeople to avoidnoise.【参考答案】：D【干扰项】：B/C（有5.00%的学生选择了该选项）词汇结构Directions:Thereare 30 incompletesentences in thispart. For eachsentence there arefour choices markedA, B, C and D Youshould decide on thebest choicer. [题数：30；分数：16分；参考时间：15分0秒]√43. Since the mid-1970s, medicine has ____ a few new treatment triumphs in the war against cancer.[A] seeded[B] shot[C] sounded[D] scored【参考答案】：D【干扰项】：该题没有学生选择了错误答案！√ 44. If you rub certain things together, their surfaces become ____ static electricity.[A] caught up with[B] charged with[C] kept up with[D] put up with【参考答案】：B【干扰项】：该题没有学生选择了错误答案！√ 45. On the steps of one building, a group of engineering seniors huddled, discussing the exam ____ begin in a few minutes.[A] due on[B] due to[C] due in[D] due【参考答案】：B【干扰项】：该题没有学生选择了错误答案！√46. The years have ____ the name of this professor, but not the lesson she taught.[A] secure[B] secured[C] obscure[D] obscured【参考答案】：D【干扰项】：该题没有学生选择了错误答案！√47. The typical classroom ____ the place where teachers and students were working together.[A] is used to be[B] is use to be[C] used to be[D] used to【参考答案】：C【干扰项】：该题没有学生选择了错误答案！√ 48. The hot water in our hotel is ____ 24 hours a day.[A] acquire[B] get[C] available[D] obtain【参考答案】：C【干扰项】：该题没有学生选择了错误答案！√49. Within 2 weeks of arrival all foreigners should ____ with the local police.[A] locate[B] register[C] restrict[D] explore【参考答案】：B【干扰项】：C（有2.00%的学生选择了该选项）√ 50. ____ taking care of her son, she has taken 3 online courses.[A] In addition to[B] In addition[C] Since[D] Because【参考答案】：A【干扰项】：B（有2.00%的学生选择了该选项）√51. In parts of Asia, you must not sit with your feet ____ to another person.[A] pointing[B] pointed[C] being pointed C. to be pointed【参考答案】：A【干扰项】：该题没有学生选择了错误答案！√ 52. Like most animals, hens will work hard for ____ to food.[A] way[B] subject[C] intension[D] access【参考答案】：D【干扰项】：该题没有学生选择了错误答案！√ 53. I have had ____ many falls that I am black and blue all over.[A] such[B] so[C] such a[D] so a【参考答案】：B【干扰项】：该题没有学生选择了错误答案！√ 54. The degree ____ which people get involved in societies varies a great deal.[A] at[B] on[C] with[D] to【参考答案】：D【干扰项】：B（有2.00%的学生选择了该选项）√55. Some totally, ____ themselves in a club, hardly speaking to anyone who isn't a member of that group for the next three years.[A] dip[B] immerse[C] sink[D] put【参考答案】：B【干扰项】：A/C（有2.00%的学生选择了该选项）√ 56. Scientific discoveries are often ____ to industrial processes.[A] secured[B] avoided[C] applied[D] tended【参考答案】：C【干扰项】：该题没有学生选择了错误答案！√ 57. This system is extremely ____ because it runs on half- price electricity.[A] economical[B] economy[C] economic[D] economically【参考答案】：A【干扰项】：B（有2.00%的学生选择了该选项）√ 58. Twenty miles ____ like a long walk to people who have never been to the countryside.[A] seem[B] seems[C] to seem[D] seeming【参考答案】：B【干扰项】：A（有2.00%的学生选择了该选项）√59. All the students in the class except Zhou Li ____ passed the final examination.[A] has[B] have[C] has been[D] have been【参考答案】：B【干扰项】：A（有5.00%的学生选择了该选项）√60. They ____ their children the virtue of always telling the truth.[A] impressed upon[B] filed into[C] consisted of[D] subscribed to【参考答案】：A【干扰项】：B/D（有2.00%的学生选择了该选项）√ 61. ____ nobody is against it, we will adopt the proposal.[A] In addition to[B] At the idea of[C] Now that[D] Somehow【参考答案】：C【干扰项】：B（有5.00%的学生选择了该选项）√ 62. This balloon remained in flight for 50 minutes ____.[A] or so[B] and so[C] but so[D] not so【参考答案】：A【干扰项】：D（有5.00%的学生选择了该选项）√ 63. ____ breaks the law will be punished sooner or later.[A] Who[B] Whoever[C] Anyone[D] Someone【参考答案】：B【干扰项】：该题没有学生选择了错误答案！√ 64. Not once ____ his view of life.[A] did he mention[B] he mentioned that[C] he mentioned[D] would he mention【参考答案】：A【干扰项】：B/C（有2.00%的学生选择了该选项）√ 65. In order to ____ a new situation we must adapt ourselves[A] take advantage of[B] become accustomed to[C] keep accompany with[D] get the best of【参考答案】：B【干扰项】：A/C（有2.00%的学生选择了该选项）√ 66. Three new buildings ____ on the campus by the end of this year.[A] will be built[B] will have been built[C] are going to be built[D] have been built【参考答案】：B【干扰项】：D（有2.00%的学生选择了该选项）× 67. This is the microscope ____ which we have had so much trouble.[A] at[B] from[C] of[D] with【参考答案】：B【干扰项】：D（有95.00%的学生选择了该选项）√ 68. More than one government official ____ involved in the case.[A] were[B] was[C] being[D] be【参考答案】：B【干扰项】：A/C（有2.00%的学生选择了该选项）√ 69. The last man ____ the sinking ship was the captain.[A] left[B] 0 to leave[C] having left[D] being left【参考答案】：B【干扰项】：C（有5.00%的学生选择了该选项）√70. We believe scientists will ____ a way to solve the problem of air pollution.[A] set off[B] put off[C] come up with[D] catch up with【参考答案】：C【干扰项】：B（有5.00%的学生选择了该选项）√71. They didn't prepare the speech contest like that, but it ____ very well.[A] kept out[B] gave out[C] left out[D] worked out【参考答案】：D【干扰项】：B（有5.00%的学生选择了该选项）√ 72. Usually, he will ____, but this time he put his foot down.[A] allow [B] annoy [C] argue [D] agree 【参考答案】：D【干扰项】：A/B （有5.00%的学生选择了该选项）完形填空Directions:There are 20 blanks in the following passage. For each blank there are four choices marked A, B, C and D below the passage. You should choose the ONE that fits into the passage. [题数：20；分数：20分；参考时间：20分0秒]Passage 1Violent thunderstorms are impressive 51 73 5274 they occur. There are, 53 75 certaincharacteristic of thunderstorms in the Great Plainsregion of the United States which 54 76 an effect 5577 extraordinarily 56 78 57 79 by suchstorms in cities or hill countries. The first difference is that a storm can be seen 58 80 from miles away. This approach gives the spectator an unusual 59 81√ 73.[A]phenomenon[B]phenomena[C] phenomenonsand allows him to see the complete storm 60 82 it were a moving entity 61 83 defined borders. Even before the storm comes into 62 84 however, its approach can be both 63 85 as rolling thunder and 64 86 as a sharp temperature drop. As the storm advances, like 65 87 unstoppable giant, it 66 88 the daylight and thus 67 89 the effect of the flashes of lightning with their almost simultaneous accompanyingpeals of 68 90 thunder. The final difference is thecommonness with which hail is a feature of Great Plainsthunderstorms. This hail is not just common or garden hailwith pea-sized hailstones. Indeed, Spaniards in the sixteenth century 69 91 hail the size of bowls, and Plains Indians also reported hail of extraordinary 7092 Doubtless, the size lost nothing in the telling, but, even today, the hailstones in Great Plains thunderstorms are often described as being the size of large marbles or golfballs.[D] phenomenae 【参考答案】：B 【干扰项】：该题没有学生选择了错误答案！ √ 74.[A] wherever[B] whenever[C] whatever [D] however 【参考答案】：A 【干扰项】：B （有5.00%的学生选择了该选项）√ 75.[A] yet [B] but [C] whatever [D] however 【参考答案】：D 【干扰项】：该题没有学生选择了错误答案！√ 76.[A] result from[B] result in[C] results from[D] results in【参考答案】：B 【干扰项】：D （有2.00%的学生选择了该选项）√ 77.[A] that is[B] which is[C] is[D] which is 【参考答案】：B 【干扰项】：该题没有学生选择了错误答案！√ 78.[A] the same as[B] same as[C]different from[D]different with【参考答案】：C 【干扰项】：该题没有学生选择了错误答案！√ 79.[A] that caused[B] which caused[C] which causes[D] that is caused【参考答案】：A 【干扰项】：D （有2.00%的学生选择了该选项）√ 80.[A] approach[B] approached [C] approaching [D] having approached 【参考答案】：C 【干扰项】：D （有2.00%的学生选择了该选项）√ 81.[A] prospect[B] perspective [C] perceptive [D] perception 【参考答案】：B 【干扰项】：该题没有学生选择了错误答案！√ 82.[A] as[B] as if[C] like[D] if【参考答案】：B 【干扰项】：A （有2.00%的学生选择了该选项）√ 83.[A] with[B] has[C] of[D] in【参考答案】：A 【干扰项】：D （有2.00%的学生选择了该选项）√ 84.[A] the sight[B] eyes[C] the scene[D] sight 【参考答案】：D 【干扰项】：B （有2.00%的学生选择了该选项）√ 85.[A] heard of[B] heard[C] seen[D] looked at【参考答案】：B 【干扰项】：该题没有学生选择了错误答案！√ 86.[A] sensed[B] felt[C] realized[D] recognized 【参考答案】：A【干扰项】：C （有2.00%的学生选择了该选项）√ 87.[A] a[B] the[C] some[D] certain 【参考答案】：C 【干扰项】：A （有2.00%的学生选择了该选项）√ 88.[A] puts out[B] erases[C] extinguishes [D] blacks out【参考答案】：D 【干扰项】：A/C （有2.00%的学生选择了该选项）√ 89.[A] heightens[B] weakens[C] deepens[D] emphasizes 【参考答案】：A 【干扰项】：B/C （有2.00%的学生选择了该选项）√ 90.[A] deaf[B] deafened[C] deafening [D] deafing 【参考答案】：C 【干扰项】：B （有2.00%的学生选择了该选项）√ 91.[A] spoke[B] said[C] spoke of[D] talked【参考答案】：C【干扰项】：A（有7.00%的学生选择了该选项）√ 92.[A]dimensions[B]dimension[C] shape[D] form【参考答案】：A【干扰项】：D（有7.00%的学生选择了该选项）命题作文Directions:Write aparagraph of around80 words explainingwhy people fallvictim toadvertising. Thefollowing two pointsand the key words andphrases after eachpoint may serve as aguide: [题数：1；分数：15分；参考时间：30分0秒]93.A Human beings have their weaknesses.be popular, be loved, stay in fashion, turn to, a sense of security B Advertisers use the weaknesses.take advantage of, new, cool, hot, stimulate, follow fashion, become victimIn real life, people always think that the heart, advertising is the best, but often some companies rely on advertising to deceive consumers, in order to be able to move the consumer, they spend huge advertising expenses. There is a Chinese saying" the wool from the sheep". Therefore, the advertising has consumer spending. People fall victim to advertising mainly for two reasons. First, human beings have their own weaknesses. People want to be popular, be loved and stay in fashion. Therefore, they often turn to advertising to have a sense of security. Second,advertisers take advantage of human weaknesses. Through advertisements, they tell people what is new, what they should look like, what is cool, and what is hot. They constantly stimulate people to want things and to follow fashion. Eventually, people become victims of advertising evenwithout realizing it.【参考答案】：People fall victim to advertising mainly for two reasons. First, human beings have their own weaknesses. People want to be popular, loved and fashionable. Therefore, they often turn to advertising to have a sense of security. Second, advertisers take advantage of human weaknesses. Through advertisements, they tell people what is new, what they should look like, what is cool, and what is hot. They constantly stimulate people to want things and to follow fashion. Eventually, people become victims of advertising even without realizing it.【学生得分】：12.6查看得分明细查看评语批注。

冬天毛衣为什么有静电英文作文The Phenomenon of Static Electricity in Winter Woolen SweatersAs the crisp chill of winter descends upon us, bundling up in cozy woolen sweaters becomes a staple of our wardrobes. However, this seasonal transition also brings about an annoying yet intriguing phenomenon – static electricity in our sweaters. Understanding why this happens and how to mitigate it can help us enjoy our winter attire more comfortably.Firstly, let's delve into the scientific explanation behind static electricity in woolen sweaters during winter. Static electricity occurs when two objects of different electrical charges come into contact and then separate, leaving one object with an excess of electrons (negative charge) and the other with a deficiency (positive charge). In the case of woolen sweaters, the fibers of wool are naturally prone to attracting and retaining static electricity due to their molecular structure and low conductivity.Winter conditions exacerbate this issue. The cold, dry air outdoors and often indoors due to heating systems reduces humidity, which is a natural conductor of electricity. This lack of moisture in the air makes it easier for electrical charges to build up and remain on surfaces, including our woolen sweaters. Additionally, the friction caused by wearing and moving in these sweaters, or even simply taking them out of the closet and putting them on, can generate static charges.So, how does this manifest in our everyday lives? When you slide across a chair or brush against another fabric, you may hear a crackling sound or feel a slight shock as you touch a metal object like a doorknob. This is the discharge of static electricity that has accumulated on your sweater. It can also cause your hair to stand on end or make your sweater cling to your body or other objects.To combat the nuisance of static electricity in woolen sweaters, there are several strategies you can employ. One effective method is to increase humidity in your living space using a humidifier. This will help conduct excess electrical charges away from your clothing and skin. Additionally, using a fabric softener when washing your woolen sweaters can reduce their tendency to generate static. Avoiding synthetic undergarments that may rub against your sweater and generate more friction is also advisable.Furthermore, grounding yourself before touching potentially shocking objects can prevent the discharge of static electricity. Simply touch a grounded metal object, like a radiator or the metal frame of a door, before grasping a doorknob or other metallic surface.In conclusion, static electricity in winter woolen sweaters is a common yet understandable occurrence, rooted in the natural properties of wool and the environmental conditions of winter. By understanding its causes and employing simple solutions, we can minimize its impact and continue to enjoy the warmth and comfort of our favorite woolen attire.。

静电吸水原理Static electricity is a phenomenon that is commonly experienced in daily life. It occurs when certain materials rub against each other, causing a transfer of electrons and resulting in one material becoming positively charged and the other negatively charged. This build-up of electrical charge can be harnessed for various purposes, one of which is the principle behind static electricity in water absorption.静电是日常生活中常见的现象。

当某些材料相互摩擦时，会导致电子的转移，使其中一个材料带正电，另一个带负电。

这种电荷的积累可以用于各种目的，其中之一就是静电吸水原理。

The process of static electricity in water absorption involves utilizing the attractive forces between the charged material and the water molecules. When a material becomes charged, either positively or negatively, it creates an electric field around itself. This electric field can interact with the polar water molecules, which are attracted tothe charged material due to their own dipole nature.静电吸水的过程涉及利用带电材料和水分子之间的吸引力。

Chapter 3: Resistance and StaticElectricityAs we have learned, some kinds of atoms contain loosely attached electrons.Electrons can be made to move easily from one atom to another. When those electrons move among the atoms of matter, a current of electricity is created.Take a piece of wire. The electrons are passed from atom to atom, creating an electrical current from one end to the other. Electrons are very, very small. A single copper penny contains more than 10,000,000,000,000,000,000,000 (1x1022) electrons.Electricity "flows" or moves through some things better than others do. The measurement of how well something conducts electricity is called its resistance.Resistance in wire depends on how thick and how long it is, and what it's made of. The thickness of wire is called its guage. The smaller the guage, the bigger the wire. Some of the largest thicknesses of regular wire is guage 1.Different types of metal are used in making wire. You can have copper wire, aluminum wire, even steel wire. Each of these metals has a different resistance; how well the metal conducts electricity. The lower the resistance of a wire, the better it conducts electricity.Copper is used in many wires because it has a lower resistance than many other metals. The wires in your walls, inside your lamps and elsewhere are usually copper.A piece of metal can be made to act like a heater. When an electrical current occurs, the resistance causes friction and the friction causes heat. The higher the resistance, the hotter it can get. So, a coiled wire high in resistance, like the wire in a hair dryer, can be very hot.Some things conduct electricity very poorly. These are called insulators. Rubber is a good insulator, and that's why rubber is used to cover wires in an electric cord. Glass is another good insulator. If you look at the end of a power line, you'll see that it is attached to some bumpy looking things. These are glass insulators. They keep the metal of the wires from touching the metal of the towers.Static ElectricityAnother type of electrical energy is static electricity. Unlike current electricity that moves, static electricity stays in one place.Try this experiment...Rub a balloon filled with air on a wool sweateror on your hair. Then hold it up to a wall. Theballoon will stay there by itself.Tie strings to the ends of two balloons. Nowrub the two balloons together, hold them bystrings at the end and put them next to each other. They'll move apart.Rubbing the balloons gives them static electricity. When you rub the balloon it picks up extra electrons from the sweater or your hair and becomes slightly negatively charged.The negative charges in the single balloon are attracted to the positive charges in the wall.The two balloons hanging by strings both have negative charges. Negative charges always repel negative charges and positive always repels positive charges. So, the two balloons' negative charges "push" each other apart.Static electricity can also give you a shock. If you walk across a carpet, shuffling your feet and touching something made of metal, a spark can jump between you and the metal object. Shuffling your feet picks up additional electrons spread over your body. When you touch a metal doorknob or something with a positive charge the electricity jumps across the small gap from your fingers just before you touch the metal knob. If you walk across a carpet and touch a computer case, you can damage the computer.One other type of static electricity is very spectacular. It's the lightning in a thunder and lightning storm. Clouds become negatively charged as ice crystals inside the clouds rub up against each other. Meanwhile, on the ground, the positive charge increases. The clouds get so highly charged that the electrons jump from the ground to the cloud, or from one cloud to another cloud. This causes a huge spark of static electricity in the sky that we call lightning.You can find out more about lightning at Web Weather for Kids -/40th/webweather/But What Is Static Electricity?You'll remember from Chapter 2 that the word "electricity" came from the Greek words "elektor," for "beaming sun" and "elektron," both words describing amber. Amber is fossilized tree sap millions of years old and has hardened as hard as a stone.Around 600 BCE (Before the Common Era) Greeks noticed a strange effect: When rubbing "elektron" against a piece of fur, the amber would start attracting particles of dust, feathers and straw. No one paid much attention to this "strange effect" until about 1600 when Dr. WilliamGilbert investigated the reactions of magnets and amber and discovered other objects can be made "electric."Gilbert said that amber acquired what he called "resinous electricity" when rubbed with fur. Glass, however, when rubbed with silk, acquired what he termed "vitreous electricity."He thought that electricity repeled the same kind and attracts the opposite kind of electricity. Gilbert and other scientists of that time thought that the friction actually created the electricity (their word for the electrical charge).In 1747, Benjamin Franklin in America and William Watson in England both reached the same conclusion. They said all materials possess a single kind of electrical "fluid." They didn't really know anything about atoms and electrons, so they called how it behaved it a "fluid.They thought that this fluid can penetrate matter freely and couldn't be created or destroyed. The two men thought that the action of rubbing (like rubbing amber with fur) moves this unseen fluid from one thing to another, electrifying both.Franklin defined the fluid as positive and the lack of fluid as negative. Therefore, according to Franklin, the direction of flow was from positive to negative. Today, we know that the opposite is true. Electricity flows from negative to positive. Others took the idea even further saying this that two fluids are involved. They said items with the same fluid attract each other. And opposite types of fluid in objects will make them repel each other.All of this was only partially right. This is how scientific theories develop. Someone thinks of why something occurs and then proposes an explanation. It can take centuries sometime to find the real truth. Instead of electricity being a fluid, it is the movement of the charged particles between the objects... the two objects are really exchanging electrons.。

静电风扇工作原理Static electricity is the accumulation of an electric charge on the surface of a material, often caused by friction. 静电是电荷在材料表面的积累，通常是由于摩擦引起的。

Static electricity can be a nuisance, causing hair to stand on end when a comb is run through it or causing clothes to stick together when they come out of the dryer. 静电可能会让头发竖起来，也可能让衣服在从烘干机中取出时粘在一起。

However, static electricity can also be harnessed for practical purposes, such as in the operation of an electrostatic fan. 但是，静电也可以被利用于实际的用途，比如静电风扇的运转。

An electrostatic fan, also known as an ionic breeze or ionizer, operates without the use of moving parts such as blades or motors. 一种叫做静电风扇的设备，也被称为离子风或离子发生器，它不需要使用像叶片或电机这样的运动部件来运行。

Instead, it uses the principles of electrostatics to create airflow. 相反，它使用静电学的原理来产生气流。

Understanding the working principle behind an electrostatic fan can provide insight into how such devices operate and the benefits they offer. 了解静电风扇背后的工作原理可以深入了解这些设备是如何运行和它们所提供的好处。

静电的吸附原理英文Static electricity is a phenomenon that occurs when there is an imbalance of electric charges within or on the surface of a material. This imbalance causes the material to become electrically charged, resulting in a buildup of static electricity. When two objects with opposite electrical charges come into contact, they can attract each other due to the force of static electricity. This is known aselectrostatic attraction.The principle behind electrostatic attraction is based on the laws of electrostatics. These laws state that like charges repel each other, and opposite charges attract each other. When a material becomes charged due to static electricity, it can attract other materials that have an opposite charge. This is because the charged material creates an electric field, which attracts the opposite charges of nearby objects.One example of this principle can be seen in the operation of photocopiers. Photocopiers use a process called electrostatic copying, which relies on the principles of electrostatic attraction. The photocopier makes a static electric charge to a photoconductive drum, which exposes the drum to light. The charged areas on the drum are then selectively exposed to toner, which sticks to the areas with opposite charges. The toner is then transferred to paper and fused, creating a copy of the original image.Another example can be seen in the attraction between astatic-charged balloon and someone's hair. When a balloon is rubbed against a person's hair, it becomes charged withstatic electricity. The hair, which has the opposite charge, is attracted to the balloon and sticks to it. This is because the electric field created by the charged balloon attracts the opposite charges in the individual hairs, causing them to stick to the balloon.In conclusion, the principle behind electrostatic attraction is based on the imbalanced electric charges that can occur on the surface of a material. This phenomenon can be observed in a variety of applications, ranging from photocopiers to the attraction between a static-charged balloon and hair. Understanding the concept of electrostatic attraction is important in order to make use of it in various applications, as well as to avoid unwanted electrostatic discharge or damage to sensitive equipment.。

限制和防止静电的产生方法Static electricity can be a nuisance in various environments, causing problems such as dust attraction, shocks, or even damage to electronic components. To limit and prevent the occurrence of static electricity, there are several methods that can be employed.静电在各种环境中可能会成为一个麻烦，导致问题如吸引灰尘、电击，甚至损坏电子元件。

为了限制和预防静电的产生，有几种方法可以采用。

One effective method to limit static electricity is through the use of antistatic products, such as antistatic sprays or mats. These products are designed to neutralize or minimize the build-up of static charge on surfaces, reducing the likelihood of static discharge.限制静电的一个有效方法是使用防静电产品，如防静电喷剂或垫。

这些产品旨在中和或最小化表面的静电积聚，减少静电放电的可能性。

Another approach to preventing static electricity is controlling the humidity levels in the environment. Dry air is more conducive to thebuild-up of static charge, so maintaining appropriate levels of humidity can help reduce static electricity.预防静电的另一种方法是控制环境中的湿度水平。

static的词根词缀"static的词根词缀"1. 单词概述单词：static含义：它主要有形容词和名词两种词性。

作为形容词时，意思是“静止的；静态的；静力的”，常用于描述物体不移动、状态不变化的情况，比如“static water”（静止的水）；也可表示“静电的”，如“static electricity”（静电）。

作为名词时，可表示“静电；静力学”等概念，在物理学等学科中经常使用。

2. 词根词缀解析词根：sta - ：来源于拉丁语，表示“站立；放置”。

词缀：- tic：是一个形容词后缀，通常表示“与……有关的；具有……性质的”。

合成逻辑：“sta -（站立；放置）+ - tic（与……有关的；具有……性质的）= static（静止的；与静止有关的）”，也就是说当一个事物具有“站立”“放置”而不动的这种性质时，就可以用static来形容。

3. 应用短文与场景应用短文1英文：I was helping my dad fix our old TV set the other day. It had been sitting in the corner for ages, collecting dust. As we opened it up, my dad said, "Be careful, there might be some static electricity in there." I was like, "Static electricity?What's that?" He started to explain, "Well, you know how everything in the world is made up of tiny particles? When these particles don't move around much, like they do in a charged object that's just sitting there, it creates static. It's like a bunch of little soldiers standing still in their positions, waiting for something to happen. It can be a real pain sometimes, especially when it makes your hair stand on end or gives you a little shock when you touch something metal."I nodded, trying to picture these tiny particles as little soldiers. "So, it's like they're on standby, not doing anything but just waiting?" I asked. "Exactly," he said. "And it's not just in TVs. Static can happen anywhere. Remember that time we rubbed the balloon on your head and it stuck to the wall? That was static too. It's like the balloon and your hair had a little argument and then the balloon decided to stick to the wall out of spite." I laughed at his explanation. It made me see static in a whole new light.中文翻译：前几天我在帮爸爸修我们家的旧电视机。

二千五百多年前,有位名叫泰利斯的希腊人,无意中发现,如果把琥珀在毛衣上摩擦,会产生一种吸力,能够把小纸片或羽毛吸起来。

虽然他并不知道为何会这样,但这可说是人类首度发现了「电」。

人类于两千五百多年前首度发现了电,后来我们又发现了摩擦能产生电,就把这种现象称为「静电」。

电之使用普及于一般家庭，因此使用电气之安全成为人人皆知的生活基本常识，但在使用安全上容易被人忽视，虽然电为最方便且安全之能源；若使用不当或工作时疏忽且缺乏安全知识，易导致人员的伤亡及财物损失。

因此使用时应注意适当的安全防护措施及正确的使用方法。

电力的使用得当，能照明、能产生动力、能发热而且控制方便又无公害是理想的能源。

但使用不当，会产生火灾，会使人触电受伤、残废，甚至于死亡。

因此大家要有正确的用电知识及使用方法，才能使电力运用达到最大效果，危险性降到最低限度。

现代化的家用电器多，习惯之后容易疏忽，应设法提醒电的危险性，是用电安全上最重要的工作。

由于证据确认困难，即使是详细的调查报告也不容易认定静电是致灾的元凶，且静电火花所产生的能量不大，故静电常被忽略。

根据一些工业先进国家较可靠的调查统计，在工厂内因静电产生的电击案件，每年平均有十分之一的工厂发生。

静电火花的能量虽小，不常造成直接伤亡事故，但因静电电击而发生坠落事件，造成间接伤亡的情形则非少见。

比较可能造成静电直接伤亡的工厂，以造纸或纸器加工业为多，间接伤亡事故曾在印刷、墨水、油脂加工、涂料业发生。

1.) What is electrostatics?（静电是什么？）所有物体都是由原子组成。

每一个原子都带有相同数目的质子和电子。

质子带正电，电子带负电。

正常状况下，正负电荷保持平衡，而使物体保持电中性。

当我们将甲、乙两个不同的绝缘体摩擦之后，如果甲物体的电子跑到乙物体上，那么甲物体的正电荷会变得比较多而带正电；另一方面，乙物体因为从甲物体那边得到额外的电子，因此便带负电。

像这种不同绝缘体因摩擦而带电的情形，就叫做『静电效应』，而因静电效应得到电子的一方，我们就说它带静电。

2021-2022学年广东省广州市黄埔区七年级（下）期末英语试卷1.（单选题，1分）选出重音位置与其它三个不同的单词。

（）A.appearB.discussC.produceD.rescue2.（单选题，1分）选出重音位置与其它三个不同的单词。

（）A.diamondB.imagineC.ordinaryD.finally3.（单选题，1分）选出重音位置与其它三个不同的单词。

（）A.cheerfulB.crystalC.achieveD.radio4.（单选题，1分）选出重音位置与其它三个不同的单词。

（）A.successB.sellerC.bottomD.planet5.（问答题，1分）[ˈɔːdə] ___6.（问答题，1分）[seɪv] ___7.（问答题，1分）['taɪdɪ] ___8.（问答题，1分）[waɪn] ___9.（问答题，1分）[ˈtaʊəl] ___10.（问答题，1分）[ˈdʒɜːni] ___11.（问答题，10分）One day,two friends were walking together.Suddenly,one of them saw a lost wallet on the road and picked it up."Oh,（1）___ a lucky day for me!" he said. "I have found a wallet with（2）___ money inside." "Don't say ‘I have found a wallet!' You（3）___ say ‘we've found a wallet' and ‘how lucky we are'.Friends should share the fortunes（幸运）and misfortunes all the time.""No,no." the man said, "I found the wallet first,so I am going to keep it for （4）___ ."（5）___ the two men were arguing,they heard a man shouting, "Stop,thief!Catch（6）___ thief!"When the man came near,（7）___ saw a group of people coming down the road withhim.The man with the wallet fell into fear."We will be in trouble if they find the wallet （8）___ us," he said."No,no," said the other, "You did not say ‘we' before when you had to share your fortune, （9）___ now keep your ‘I'.Say ‘I am in trouble'.Don't try to share your misfortune now when you were not ready to share your fortune earlier.Remember：it is important for friends （10）___ both fortunes and misfortunes."（1）A.how B.what C.when D.why（2）A.little B.a few C.some D.many（3）A.may not B.can't C.should D.will（4）A.myself B.itself C.himself D.ourselves（5）A.Before B.After C.Until D.When（6）A.a B.an C. / D.the（7）A.they B.we C.you D.it（8）A.with B.in C.at D.around（9）A.and B.so C.but D.or（10）A.share B.sharing C.to share D.shared12.（填空题，10分）Thirty years ago,I lived with a dog called Cookie.Though I lived a（an）（1）___ life at that time and I couldn't even support myself,I never thought of giving it away. When Cookie saw my（2）___ spread across the bed,she knew that I was packing for atrip.Then she would show unhappiness with her tail,trying to let me（3）___ .When I came back home and wrote my stories,she always sat next to my desk and I would tell her about what I saw and what I heard during the trip.I often read to her what I've written.If she （4）___ me,I knew my story wasn't good enough,and I had to improve it.Of course,she didn't understand what I was really（5）___ .But I could write a （6）___ better in this way.She inspired（激发）me to make up many stories and became my partner in my travels.Some （7）___ of mine may think it impossible to have such a relationship,but dog owners like me will know it's true and（8）___ us.Today I am still a travel writer.My heart is broken because my friend Cookie （9）___ me forever.Like many old friends,she and I shared much over the years.I miss her so much and I am （10）___ to her for being on my side for all those years,listening and caring.It doesn't matter if she never understood a word I said.She was my travel partner and always will be.（1）A.easy B.happy C.boring D.hard（2）A.bags B.glasses C.newspaper D.pens（3）ugh B.cry C.stay D.leave（4）A.turned away from B.looked at C.turned to D.listened to （5）A.watching B.writing C.singing D.cooking（6）A.song B.poem C.story D.programme （7）A.teachers B.visitors C.students D.readers（8）A.understand B.disagree C.discuss D.forget（9）A.changed B.left C.supported D.remembered （10）A.careful B.helpful C.thankful eful13.（填空题，10分）Whenever the sun rose and the blue sky came up,my father and I would climb the mountain near my house.I believe mountain climbing is really beneficial .It gave me time to understand my father better and made me feel relaxed.One time we climbed one of the highest mountains in Korea.It was so difficult for me because Iwas only ten years old.During the first few hours of climbing,I enjoyed the fresh air,the birds singing,and the beautiful dances of butterflies.But as time passed,I got a pain in both of my legs.At that moment,I wanted to stop climbing.In fact,I hated it at that moment,but my father said to me, "Spring is a season when everything comes to life again.The mountain and field where we are standing are covered with flowers and trees.You can always see a beautiful sky at the top of the mountain,but you can't see it before you reach the top.You can always enjoy the views of many waterfalls,temples and valleys at the top of the mountain,but you can't when you are halfway up.Only there at the top can you enjoy all of those things.This is also true in life."At that time,I was too young to understand his words.But his words really gave me new hope and confidence.Finally,I found myself standing at the top of the mountain.How amazing it is!And there,I could see the whole sky.The sky was as clear as crystal.（1）What does the underlined word "beneficial" in Paragraph 1 mean？ ___A.Harmful.B.Helpful.C.Hopeful.D.Lively.（2）Why did the writer want to stop climbing？ ___A.Because he didn't like climbing at all.B.Because he was too young.C.Because he was only ten years old.D.Because he felt a pain in his legs.（3）What does the underlined "it" in Paragraph 3 refer to？ ___A.The mountain with trees.B.The field with flowers.C.A beautiful sky.D.A waterfall.（4）How did the writer feel when he stood at the top of the mountain？ ___A.Excited.B.Bored.C.Tired.D.Sad.（5）What is the best title of the passage？ ___A.Walking with father.B.Climbing mountains.C.Enjoying views along the mountain.D.Reaching the top of the mountain.14.（填空题，10分）Remember how Harry Potter and his friends used a magic spell to make their feathers float in the air？Now you can do magic too！Here are three fun experiments you can do at home to see the power of static electricity（静电）first-hand！Flying Plastic BagWhat you will need：a plastic rod（棒），a piece of cloth,a light plastic bagSteps：Rub（摩擦）the rod with the cloth for 40 seconds；Flatten the plastic bag and rub the cloth against it for 40 seconds；Let go of the plastic bag and watch it"dance"in the air as you wave the rod below.Separating（分开）Salt and Pepper（胡椒）What you will need：a plastic spoon,salt,pepper,a piece of clothSteps：Mix（混合）a spoon of salt and pepper；Rub the spoon with the cloth for 40 seconds；Hold the spoon over the mixture.The pepper will jump up and stick to the spoon.Bending（弯曲）waterWhat you will need：a plastic rod；a piece of cloth；running waterSteps：Rub the rod with the cloth for 40 seconds；Turn the tap on so there is a steady stream of water；Put the rod near the water and watch it "bend".（1）The writer mentioned（提及）Harry Porter and his friends ___ .A.to tell the readers what static electricity isB.to show the readers why the movie was popularC.to encourage the readers to do some fun experimentsD.to lead the readers to find out how the magic worked（2）You will need ___ in all the three fun experiments.A.a piece of clothB.a plastic rodC.a plastic bagD.a spoon of salt（3）If you try the second experiment,you should ___ .A.stick the pepper to the clothB.choose the right size of the clothC.rub the spoon for more than one minuteD.hold the spoon over the mixture of salt and pepper（4）We can learn from the passage that ___ .A.it is better to use a heavy bag in the first experimentB.rubbing two things together produces static electricityC.all the three experiments should be done in a science labD.bending water is the most difficult experiment of the three（5）The passage can probably be found in the ___ section（版块）of a magazine.A.natureB.sportsC.scienceD.health15.（填空题，10分）Many people dream of going on a challenging（有挑战性的）travel.Most of them keep dreaming；others make it happen.Gregg Bleakney dreamed of bike riding from North America to South America after finishing a pleasant bike ride.So did Gregg's friend,Brooks Allen.To pay for the trip,the two friends worked for years.When they were on the road,they often camped outdoors or stayed in cheap hotels.In many places,local people opened their homes to the two friends and gave them food.During their trip,Gregg and Brooks rode through deserts,rainforests,and mountains.They visited modern cities and ancient buildings.On the way they met other bicyclists from all over the world.After some time Brooks had to return to the USA near the bottom of South Americaand Gregg continued without him.In May 2007，Gregg reached his goal.He traveled twelve countries and finished the 30，500-kilometer trip.Gregg and Brooks kept a record of their trips in a blog.The trips taught both men a lot about traveling.：Travel light.The less luggages（行李）you have,the less you'll worry about them.Get ready.Don't plan everything.Always be ready for something out of plan.Then you'll be more relaxed and happier,even when you meet some challenges along the way.Be polite.As one traveler told Gregg, "Always remember that nobody wants to fight or cheat a nice person."Anything worth doing needs time,energy and action.If you hold on to your dream,you can make it like that of Gregg and Brooks and have fun while you're at it.（1）How did Gregg and Brooks travel from North America to South America？___A.By bike.B.On foot.C.By bus.D.By car.（2）Why did the two friends work for years before their trip？___A.Because they wanted to buy new cars.B.Because they wanted to know about the trips.C.Because they wanted to make money for the trip.D.Because they wanted to make more friends.（3）What happened during the trip to South America？___A.Gregg and Brooks often stayed in expensive hotels.B.Brooks had to return to the USA when in the middle of North America.C.Brooks and Gregg finished the 30，500-kilometer trip.D.Gregg and Brooks met other bicyclists from all over the world.（4）Which of the following may we put in the black "________" in Paragraph 4？___A.Here is a report of Gregg and Brooks.B.Here is some of Gregg and Brooks' advice.C.Here are some of Gregg and Brooks' diaries.D.Here are some of the cities and buildings on their trips.（5）Which is Not mentioned about the trip in the two men's blog？ ___A.Be a nice person.B.Travel with less luggage.C.Have dream in your trip.D.Be ready for some difficulties.16.（问答题，5分）Trees are our friends on Earth.They are useful to us in three very important ways.（1）___ Trees provide food not only for man but also for many animals.Without trees,many animals could not live on Earth.（2）___ The second important way is that trees give us shade.On a hot summer day,people like to have a rest under the shade of a tree after they have walked a long way.（3）___The third important way is that trees help prevent droughts and floods（旱灾和水灾）. （4）___ They have cut trees down in large numbers. （5）___A.The same thing will happen to men,too.B.In the end they find that they have lost the best friends they ever had.C.The first important way is that they provide man with food,wood and other products.D.However,in many parts of the world,people have not realized it.E.You can imagine how important it is to people.17.（问答题，5分）My teacher,Ms.Jean,is a cheerful person.She often tells（1）j ___ to make us laugh.And she is always patient with us.When we meet problems,she always gives us support and encourages us not to（2）g ___ up.Ms.Jean enjoys travelling a lot during her holidays.Her favorite place is Hainan Island,which lies in the （3）s ___ of China.She loves nature and animals.She often says, "Nature is our best friend.Trees help us fight （4）a ___ airpollution.Animals are our friends.We must try our best to save valuable resources like waterand electricity.We can't imagine a world without them."We all like Ms.Jean.I will never （5）f ___ her who makes our school life colourful.I hope she will go on teaching us for the next school year.18.（问答题，2分）你的字写得真漂亮！___ your handwriting is!19.（问答题，2分）太苦了！请在我的咖啡里加点糖！It's too bitter.Please ___ some sugar ___ the coffee!20.（问答题，2分）晓华以前挺害羞的，但她现在喜欢和别人说话。