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闵行区2017高考英语二模,2017闵行二模英语高考
tamoadmin 2024-05-15 人已围观
简介在磁铁的N极位置与S极位置对调前,根据左手定则判断可知,导线所受的安培力方向斜向下,由牛顿第三定律得知,磁铁所受的安培力方向斜向上.设安培力大小为F安,斜面的倾角为α,磁铁的重力为G.由磁铁的力平衡得:斜面对磁铁的支持力:F=(G-F安)cosα摩擦力:f=(G-F安)sinα在磁铁的N极位置与S极位置对调后,同理可知,斜面对磁铁的支持力:F=(G+F安)cosα摩擦力:f=(G+F安)sinα可
在磁铁的N极位置与S极位置对调前,根据左手定则判断可知,导线所受的安培力方向斜向下,由牛顿第三定律得知,磁铁所受的安培力方向斜向上.设安培力大小为F安,斜面的倾角为α,磁铁的重力为G.由磁铁的力平衡得:
斜面对磁铁的支持力:F=(G-F安)cosα
摩擦力:f=(G-F安)sinα
在磁铁的N极位置与S极位置对调后,同理可知,斜面对磁铁的支持力:F=(G+F安)cosα摩擦力:
f=(G+F安)sinα
可见,F、f都增大.选项ABD错误,C正确.
故选C
在平平淡淡的学习、工作、生活中,大家都跟作文打过交道吧,作文是经过人的思想考虑和语言组织,通过文字来表达一个主题意义的记叙方法。那要怎么写好作文呢?下面是我为大家整理的英语话题作文10篇,欢迎阅读,希望大家能够喜欢。
英语话题作文 篇1Eating is a important part in our daily life.Up to now,many people waste food as much as they can.As a middle school ,I am very depressed.
In order to protect the value food,we must try our best to do something which can stop people from wasting.Such as putting up some pictures and so on .
Therefore,saving food is our task now.Let us do it from now on!
英语话题作文 篇2怎样学好英语
世界在发展,文化在交融,英语已经成为人们沟通的桥梁。怎样学好英语是我们一直在探索的问题。几年的学习经历你一定积累了许多成功的经验,请从听、说、读、写四方面谈谈你的.建议。
要求:1.词数:80—100词(开头已给出,不计入总词数)
2.字迹工整,语言流畅,表达正确,逻辑清晰。
★范文
How to learn English well
English is important and useful tous. How can we learn it well?Here are my suggestions。
First , we should often listen to the tapes, English song sand programs. Watching English movie sisal so helpful tous. Second, we should speak English in class as much as possible. Don’t beafraid of making mistakes. The more you speak, the fewer mistakes you’ll make. We'd better join the Englishc lub and practice with others. Third, we can read more English new spapers and magazines. It’s good forus. Atlast, we should recite some good passage sand keep diaries。
In a word, a slong as we do more listening, speaking, reading and writing, we will learn English well。
英语话题作文 篇3A Poster Calling for the Design of Environment-friendly Cloth Bag
In recent years, to control the “white pollution”,our government has taken a lot of measures to promote the use of environment-friendly cloth bags. In respond to government’s appeal, the Environment Protection Association of our department will invite you to take part in our activity of cloth bag design.
You can submit your design by email or in person. Your wonderful designs are expected before June,1st. If your designs are chosen by our association , you will have a bonus of ¥ 200.
If you want to get more detailed information about our activity, you may have contact with us on the number 12345678 or e-mail us by cloth bag design @163.com.
Your active participation will be greatly appreciated. We are looking forward to your terrific design.
英语话题作文 篇4Should the Golden Week Holidays BeAbolished?
There is no denying the fact that the introductionof the Golden Week holidays in China has considerably promoted the development of thenation’s economy and touring industry and enriched people’s life. People around the countryhave spent more time and money traveling and relaxing themselves.
As every coin has two sides, the Golden Week holidays have also brought about piles ofproblems. For one thing, due to the fact that people across the country are spending theirvacations during the same period of time, it is terribly crowded almost everywhere: trains,buses, hotels, scenic spots, etc., which have ruined people’s mood for vacations. For another,some businessmen take advantage of the weeklong holidays and raise the price ofcommodities and services.
Personally, I believe that it is necessary for people to have long vacations, but there is noneed for them to have the vacations during the same period of time. Instead, they should beallowed the freedom to arrange their own vacations. Only in this way can they really relax andrefresh themselves for a new round of work.
英语话题作文 篇5Nowadays, there are more and more (某种现象) in (某种场合)。 It is estimated that (相关数据)。 Why have there been so many (某种现象)? Maybe the reasons can be listed as follows。 The first one is (原因一)。 Besides, (原因二)。 The third one is (原因三)。 To sum up, the main cause of (某种现象) is due to (最主要原因)。 It is high time that something were done upon it。 For one thing, (解决办法一)。 On the other hand, (解决办法二)。 All these measures will certainly reduce the number of (某种现象)。
英语话题作文 篇6高考英语话题作文:诚实、诚信
按下列要求写一篇作文。
1、生活中确实存在不讲诚信的现象;
2、举一例说明(如,有毒奶粉、冒名顶替上大学、考试作弊等);
3、讲求诚信的意义。
Almost all of us heard the story Here Comes the Wolf when we were little kids. What we can learn from the story is that we must be honest. However, therere lots of phenomena of dishonesty nowadays.
Being dishonest does great harm not only to other people but also to yourself. Take the case of fake milk powder for example. After drinking this kind of milk, the babies had big heads while their legs and arms were still thin, which badly affected their health. To our great relief, the producers got accused and punished for all the serious consequences in the end.
Having the reputation of being honest and reliable will make other people trust you, which will provide you many benefits and give you opportunities that others may not get. Being honest, you will find it easier to cooperate with others and people will be friendly to you and support you. In a sense, if life is a longjourney, honesty will be the backpack that should be taken along all the way.
英语话题作文 篇7英语作文:描述近一周的天气状况
It's going to be sunny on next Monday, has a highest temperature of 9 degree and a lowest of 5 degree . And it continues to be pretty good on Tuesday, has a highest temperature of 12 degree and possiblly a lowest temperature of 6 degree. But Wendsday is going to be a little windy, and getting cold. Highest temperature of 4 degree, lowest of -1 degree. And it will get colder and colder. Thursday is going to be cloudy, a highest temperature of 2 degree, a lowest temperature of -5. On Friday, it's going to rain. Also very windy, so better put on some warm cloth for that day. A highest temperature of -5 degree, a lowest temperature of -10 degree.
2、天气预报(Weather Forecast)
Let''s take a look at the weather in Shanxi Province for the next 24 hours. Taiyuan would be cloudy at the time with the temperature from eighteen to twenty-eight. A strong wind would reach Datong, which could cause much rain, The temperature would be sixteen to twenty-six. Yangquan would be sunny with the highest temperature of thirty degree. Linfen would be windy and its temperature would be twenty-three to thirty-two. We would have a sunny and hot day in Yuncheng. Its temperature would stay between twenty-eight to thirty-four.
英语话题作文 篇8About three decades ago, China was known as the “Bicycle Kingdom”. But the two-wheeled mode (方式) of transport’s popularity began to fade, with many bikes soon replaced by their fuel-powered competitors. 大约30年前,中国被称为“自行车王国”。但随着自行车被燃油驱动的汽车所取代,这种双轮交通方式的热度也开始衰退。 But recent months have seen a revival (复兴) of the humble (普通的) bike across China, with an increasing number of people choosing cycling instead of driving to schools, to workplaces or to do sightseeing. The introduction of bike-sharing schemes, pioneered by start-ups (新兴公司) like Ofo and Mobike, has brought the trend to a new level. 但近几个月,中国大地上见证了一场普通自行车的复兴,越来越多的人选择骑车上班上学、游览观光,而非驾车出行。而由Ofo、摩拜单车等新兴公司发起的共享单车计划,则将这一趋势带向了一个新高度。
According to data compiled (编制) by iResearch Consulting Group, the first week of this year saw 5.85 million active users of Mobike while Ofo had 1.4 million active users. 根据艾瑞咨询集团整理的数据显示,在本年度的第一周中,摩拜单车共有585万活跃用户,而Ofo则有140万。 People can unlock the shared bikes by simply using their smartphone. The bikes are equipped with GPS and can be left anywhere in public for the next user. They’re popular among many Chinese people as they provide an effective solution to the “last mile” problem, which refers to the final leg of a person’s journey. 仅凭自己的智能手机,人们就能解锁这种共享单车。这些单车都装有全球定位系统,可以被放在公共场合的任何地方,等待下一位用户使用。它们受到了许多中国人的欢迎,因为它们有效地解决了“最后一公里”难题,即个人行程中的最后一段。 “In places where the subway doesn’t extend (延伸到), where it’s difficult to change from one kind of transport to another, it’s so easy to get where you want to go with Mobike,” Hu Hong, 29, told AFP. She pedals (骑自行车) to her Shanghai real-estate (房地产) job. “在地铁线路覆盖不到的地方,很难换乘其他交通,用摩拜单车去你想去的地方就简单多了,”29岁的胡红(音译)在接受法新社采访时表示。在上海从事房地产行业的她都是骑自行车去上班的。 However, the schemes have also led to problems such as illegal parking, vandalism (故意破坏) and theft. 然而,这一计划也出现了一些问题,如非法停车,故意破坏和偷窃等。 Last month, two nurses in Beijing were placed under administrative detention (行政拘留) for five days for putting locks on two shared bikes. 上个月,北京的两名护士因在共享单车上上锁(占为己有),被行政拘留5天。 And in December, a man who stole a shared bike was sentenced to a 3-month detention with a 3-month probation (缓刑期), and fined 1,000 yuan by the Shanghai Minhang People’s Court. 而在去年12月,一名男子因偷窃一辆共享单车,被上海闵行人民法院判处拘役3个月,缓刑3个月,并处罚金人民币一千元。 “Bike-sharing is a greener method of transportation and provides a user-friendly experience,” said Liu Xiaoming, vice-minister of transport. “But it’s a combination of online and offline business. Operators are usually strong in online services, but lack offline business experience, which causes problems.” “共享单车是种更加绿色的出行方式,并且为用户提供了一种友好的体验,”交通部副部长刘小明表示。“但是这是一种线上和线下商业的结合。经营者的线上业务能力很强,但缺乏线下业务经验,导致了问题产生。” In fact, these problems are also shared by bike-sharing schemes abroad. Launched in 20xx, Vélib is a large-scale public bike sharing system in Paris. At its early stage of operation, it also suffered from problems of vandalism or theft. 事实上,这些问题在国外的共享单车体系中也同样存在。创建于20xx年的Vélib是一个位于巴黎的大型公共单车共享系统。在其初期的运营中,它也曾遭遇故意损毁及偷窃等问题。 By Oct 20xx, a large number of Vélib’s initial bikes had to be replaced due to vandalism or theft, according to The New York Times. Bikes were found hanging from lampposts (街灯柱) or thrown into the Seine River. 据《纽约时报》报道,截至20xx年10月,由于故意损毁和偷窃问题,大量初期的Vélib自行车不得不被置换。这些自行车曾被发现挂在街灯柱上,或是被扔进塞纳河中。 To deal with these problems, the company came up with the idea of encouraging people to return the bikes to stations by rewarding free time for their next rides. 为了处理这些问题,该公司想到一个办法:鼓励人们将自行车归还至站点,并在他们下次使用时奖励免费用车时间。 Now, Chinese service operators are also trying to address these problems. For example, Mobike sets a 100-point credit score for each user, with points taken in the case of bad behavior. Once a score drops below 80, bike rental is increased to 100 yuan per 30 minutes, up from 0.5-1 yuan. 现在,中国的服务经营者们也开始尝试去解决这些问题。举个例子,摩拜单车为每个用户设定了100分的信用值,行为不当将会被扣分。当信用值降到80分以下,自行车租赁费用将会从每30分钟0.5-1元上涨到100元。
英语话题作文 篇9The thankful great universe provides the environment of existence for us and give us sunlight, air, water and everything in keeping with us existence of space, bring storm to let us accept to toughen for us, bring to us mysterious let us look for。 The thankful parents give us the life, make us feel the merriment of the human life, feel the genuine feeling of the human life, feel the comity of the human life, feel happiness of the human life, also feel hardships and pain and sufferings of the human life! The thankful teacher works with diligence and without fatigue everyday of teach, give us knowledge ability, and put on the wing which flies toward the ideal for us。 The thankful classmate and friend grow up with us and let us no longer stand alone in the itinerary of life。 The thankful our country provides us with free books, dormitory and food。 Whenever it is, we should keep a thankful heart towards everything existed。 Only thus, can we become a useful man。
英语话题作文 篇10This picture is simple but significant. As is shown in the picture above, rising up his head, a young boy is holding a glorious sun with his firm hand. The caption indicates that, “ with dreams, our hearts can fly high; with flight, our dreams will not be far away.”
Why are dreams so importantWe may attribute its significance to three factors. First and foremost, dreams can give us courage and strength to overcome all the difficulties in our lives. Besides, having dreams is beneficial for us to be confident, passionate and energetic, and it may put us in a favorable position in our life journey. On the contrary, were there no dreams, our life will be dull and meaningless. Last but not least, if all of us have dreams, our society will be more vigorous and harmonious.
Considering every aspect of this positive issue, we should bear in mind that dreams are of great significance to both our society and ourselves.Therefore, the mass media, such as television, Internet and radio, should try best to propaganda and advocate it. As for ourselves, we should take practical actions to cherish our precious dreams and let them be realized. Then, we have every reason to be convinced that we can have a bright future if we have dreams.