Ⅰ 求3篇400字左右的英语短文（追加50分）
Evolution and Wheels
In the past, evolutionary biologists contemplating the absence of wheels in nature agreed that the explanation was not undesirability: wheels would be good for animals, just as they are for us. Animals were prevented from evolving wheels, the biologists reasoned, by the following dilemma: living cells in an animal's body are connected to the heart by blood vessels, and to the brain by nerves. Because a rotating joint is essential to a wheel, a wheel made of living cells would twist its artery vein and nerve connections at the first revolution, making living impracticable.
However, there is a flaw in the argument that the evolution of wheeled animals was thwarted by the insoluble joint problem. The theory fails to explain why animals have not evolved wheels of dead tissue with no need for arteries and nerves. Countless animals, including us, bear external structures without blood supply or nerves - for example, our hair and fingernails, or the scales, claws, and ho rns of other animals. Why have rats not evolved bony wheels, similar to roller skates?Paws might be more useful than wheels in some situations, but cats' claws are retractable: why not retractable wheels?We thus arrive at the serious biological paradox flippantly termed the RRR dilemma: nature's failure to proce rats with retractable roller skates. 进化与轮子
从前，研究自然界没有轮子的进化论生物学家都同意不能用无此需要来解释这种现象：轮子对于动物会像对于我们人类一样有好处。 生物学家们推论，动物没有进化出轮子是由下述困难所致：动物身上的活细胞通过血管与心脏相连，通过神经与大脑相连。 因为一个旋转的接头对轮子来说是至关重要的，由活的细胞构成的轮子在第一次转动时便会扭伤其上的动脉和神经的连结，因而不现实。
不过，动物未能进化出轮子是受阻于无法解决接头问题的说法有一个缺陷。 这种理论无法解释为何动物没有进化出由死组织构成的而无需动脉和神经的轮子。 包括人在内的无数动物都有一些没有血液供应和神经的体外构造，例如，我们的头发和指甲，或者鳞片、爪子和其它一些动物的角。为什么老鼠没有进化出类似于滑轮溜冰鞋的骨质的轮子呢?在某些情况下，爪子可能比轮子更有用，但猫的爪子是可以伸缩的： 为什么不能有可以伸缩的轮子呢?这样，我们便得出了一个被戏称为RRR 的严肃的生物学悖论：大自然未能产生出有可伸缩的滑轮溜冰鞋的老鼠。
John is the most diligent student in our class. He is one of my friends. As a matter of fact, he gets along with his classmates. He might spend just five to ten minutes talking to you once in a long while, but he talks with enthusiasm and energy, and he likes to share his thinking and ideas with you. He is honest; he does not like to waste his time and energy. He never appears sleepy and tired in the classroom. He always hands in homework on time and also does well in his examinations, yet he has time practicing playing football and his violin skill. I admire him. I hope I can be as diligent as he is; John is persistent, attentive, and energetic.
John是我们班上最勤奋的学生。他也是我的一个朋友。实际上，他和班上的同学相处的都很融洽。也许过好长时间他才只是花5分钟或10分钟和你聊天，但是他的谈话充满了活力和热情，而且他喜欢和你分享他的思想和想法。他是诚实的，他不会无谓的浪费他的时间和精力。在教室里，他从没有显得困倦或是疲惫。他常常会按时交作业，考试中也会取得好成绩，然而他仍会有时间踢足球和练小提琴。我羡慕他，我希望自己能象他那样勤奋。John是个执着、专注、充满活力的人。
8 January 20 2005
I have stayed in Shanghai alone for a week. It’s time for me to go to my real home—it is in Beijing. My parents are waiting for me. Although outside is no matter how beautiful, Beijing is still my home. In fact, there is many fresh things. Like red bayberries. In the afternoon, I took a bus to Beijing. I was very unlucky that my mp3 was stolen. I was very sad. I didn’t know why thieves went to steal other’s things. Why don’t they hunt for a job? I don’t why! I hope there is no thief in our motherland.
When I got home, it was very dark. Why? There is no electric. Every year in Beijing, there is lack of electric to supply. Because there are a lot of factories. And it is very cold in winter. So the government decided: supply electric to resident and the factories must stop working. My house is in the manufacturing district. I was unlucky. It was very cold. So my father use the electric making machine to make electric. Oh! What a unlucky winter!
Ⅱ 英语作文：描述一下汽车结构（100字以内)
Car with four wheels or more than four non-rail vehicle without wiring. Car generally by the engine, chassis, body and electrical equipment such as four basic components.
行吗?
Ⅲ 以发明为题的英语作文关自行车和电脑的
In 1790,a French name,with his mind he loved so much.One day,he walked on a street in Paris,because the day rained,accumulated a lot of rain,on the road is very bad.Suddenly,from behind a carriage is rolling in and the street is narrow,the carriage is very wide,the schiff,hide to hide to fortunately not knocked down by a car,or was spattered mud and rain.Others saw it,sorry for him,but also gas straight scold,want to shout the cart stopped,reasonable representations.The schiff,but murmured:"don't cry,don't shout,let them go." Carriage and walked away,he was standing on the side of the road,he was thinking:the road is so narrow,pedestrians and so much,why can't the carriage structure changed?Should the carriage along the cut off half,before and after the four wheels to two wheels...He thought,so home will begin to carry on the design.After repeated experiments,in 1791 the first walking "Trojan horse" of the car made out.The earliest bicycles are made of wood,its structure is simple,neither drive,also have no steering device,cyclists on foot hard ground,change direction,and can only move the car when the car.Even so,when the schiff,ride the bike to the park for a ride,all the people present are quite amazing and impressive.
Ⅳ 英语作文:我最喜欢的玩具汽车
收到！望采纳！
I have a toy car, my mother when I was 4 years old birthday gave me.
It is wrapped in a plastic camouflage armor, like a soldier to fight, can be the air.
I remember once, I was criticized by the teacher in the school, I went home tobecome dejected and despondent, open my door, sat in the chair, sad. Then, I saw a table of the car, I'll forget all the sad things. I took the bag from the pencil box to write homework, I was doing homework, watching my beloved car, the car seemed tosay to me: "the next performance is good, can not be criticized by the teacher." I think: Yeah, I nodded, the next performance is good, can not be criticized by the teacher.
I very love my toy car.
Ⅳ 求一篇“最尴尬的时刻”的英语作文
你自己截一段吧 以前我收集的：
Embarrassing Moments
Once in Social Studies we were going over a homework from the night before it had a paragraph that you had to read and you had to write what type of government it talked about and I was kind of praying that she wouldn't call on me to read one of the paragraphs and...she did I froze up and my face turned soo red I tried to read but nothing would come out everybody was laughing really hard and I was soo embarrassed and she didn't get the picture that I wasn't gonna read it until like 5 minutes later!! and I started crying a little and everything it was the most embarrassing moment of my entire life.
by Samantha
I was in 5th grade at Quail Valley Elementary (QVE). Our class was writing reports on animals. I was a stutterer, and had been since I was 3 or 4 years old. I had picked "Sharks" to report on. I knew I would have to read my paper aloud to the class when I turned the paper in to my teacher, Ms. R. Knowing that, I tried to make my paper as short as possible. Ms. R was a new teacher at QVE. Our principal was disabled, and couldn't walk, but she had no problem getting to each new teacher class and checking on the teacher. The principal would roll around to each class with one of the school's new teachers and just sit there on her wheels and watch the class. I had finished my Sharks report and we were sharing our reports. When it comes to my turn, I get up in front of the class, smack on my charm smile, and begin stuttering. Our principal rolls in and starts watching me. I can tell she is about to throw up from watching me stomp my feet and roll my head. Poor Ms. R. What will the Principal think of her now? One of her students can't even read. Unfortunately, my teacher didn't let me sit down. I had to sit there for 30 minutes and [try to] read my paper. I think finally she let me stop, the entire class was probably swimming in my tears by then. That was the most embarassing moment of my life thus far.
by James
Ⅵ 英语自行车的发明作文
【The Invention of the Bicycle】
A French father-and-son team of carriage-makers, Pierre and Ernest Michaux, invented an improved bicycle in the 1860's. Many early bicycles (called velocipedes, meaning "fast foot," or, more descriptively, "bone shakers") had huge front wheels —— it was thought that the bigger the wheel, the faster you could go. Early tires were wooden —— metal tires were an improvement, and solid rubber tires were added later. A chain with sprockets was added to the bicycle in the 1880's; this was called the "safety bicycle." Air-filled tires were also added in the 1880's. The derailleur gear system was added in the 1970's.
Nowadays,it's important for us to live the low-carbon life. So riding bicycle is the best choice for us to go around. It's not only benefit for our health and also cheaper than cars and the oil is not necessary for bicycles. The better thing is, it was so friendly to environment that it won't proce any polution. So let's go for a ride!
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五星级回答，一定要采纳哦，不要辜负我的辛苦劳动！
【来自英语牛人团】
Ⅶ 备战高考英语典型范文…万能作文
汽车进入普通中国家庭
Some instry insiders claim, "China which used to be a state on two wheels will some day be a state on four wheels." With the level of life raised, more families will prefer to buy cars. Cars provide speed, comfort and convenience in getting around. As the proct of modern civilization, cars are likely to play a vital part in daily activities of Chinese.Obviously, cars, like anything else, have more than one face to families in China. Let's have a closer look at the present situation. We may find that though some people can afford them, crowded streets, limited parking lots (停车场) and costly maintenance (保养)are headaches to private car drivers.
Although private car drivers have some troubles, driving a car indicates the trend of modern living. With low tax, sufficient highway development and parking lots, cars are bound to be household vehicles with high performance. Then private cars will enjoy more popularity.
Ⅷ 英语作文A special gift I got 60个字。。。。。。急啊，半小时之内给我答复!!!!!!!!!!!!!!!!!!!!!!!!
My birthday this year, I got a special gift from my friend. It is an ordinary notebook. However, on the first page of it were some words of my friend. It said, "My dear friend, this is for you to write down your bright future. I hope that I can read your bright future someday. Best wishes!" I was really impressed by this gift. And I believe that I will value it all through my life.
Ⅸ 关于自行车作文
The bicycle is the most successful human inventions of a human machine, is composed of many simple machines
Complex machinery.
In 1790, there were French, his love for brains. One day, he was walking a street in Paris, because the world over the previous rain, the way a lot of rain plot, it is good to go. Suddenly, a carriage came straight from behind, the road is fairly narrow and very wide carriage, Xifulake fortunate not to hide to avoid being hit by a car, or been splashed all over a mud and rain. Others see, feel sorry for him, but also angry and Zhi Ma, want to cry carriage stopped, unreasonable representations. Xifulake has murmured: "Do not cry, do not cry, let them go." Carriage gone, and he just stood roadside. He was thinking: Road so narrow, so many pedestrians, why can not the coach what the structure to facilitate some changes? Should be cut off half of the carriage along the four wheels, two wheels into a before and after the ... ... he such a thought, home on hands-on design. After repeated tests, the first aircraft in 1791 to travel by "Trojan wheel" car made out. Zhe Liang wooden cart with two wheels around the middle attached beam, a bench top security, like a toy-like. As the car has not drive chain, by the rider pedal force in their legs, the car can move forward slowly, but also without steering the car, only go straight, do not turn and go riding for a while on the tired sweaty .
The emergence of new stuff just is not always so perfect. Xifulake not discouraged, he continued to try to improve. Unfortunately, the long illness he died.
1816, in Germany there is to see in the woods His names is delaxis, his daily-east of this one from the forest, wandering the West's another piece of wood, year after year. He thought: If the person sitting in the car, the stop-go, anywhere, not very handsome it? Delaisse began making wooden wheel, made almost look like Xifulake. However, adding a front wheel on the handlebar control the direction of child, to change the way forward. But cycling is still to use two feet, about what step to push off the ground, to push the car roll forward. When dries out test riding time along the way were many people laughing. Still, he loves his creation of this "lovely pony cubs." Wandering in the cycle when one dries over an open carriage, the driver laughed at his car, he said slowly, so he and the driver said: "Believe it or not my car faster than your horse" So the two of them play the bet. Distance from the village of West-east to a back and forth, results dries faster than the driver a whole more than one hour.
In 1840, England's blacksmith McMillan, and got a run-down "pony cute cubs." He installed on the rear axle crank, and then crank and connecting rod to connect the front of the pedal, and both front and rear wheels with iron, large front and rear small. When the rider stepped fixed pedal, the car will be up on their own campaign, ran forward. Thus, it makes the rider's feet off the ground really, to walk, alternating stepping move into the wheel rolling, speed greatly improved. 1842, Macmillan ride this car, ran 20 kilometers a day, because they do not care, cycling too fast, hit the road a little girl, it was the police to seize, and fines. The charges of "brutal ride."
In 1861, France Michaud and his son, originally a carriage repair Carpenter job, they can be installed in front of the pedal plate rotation; car saddle rack above the front wheel, so unless the bike's technology, especially sophisticated, or instability on the grasping handlebars, fell off from the car. They Zheliang two-wheelers as a "bicycle" of James, and in 1867 at the Paris Expo exhibition, the audience an eye-opener.
In 1869, Renault UK after seeing the bike in France, that car is too heavy, and began pondering how to light a number of bike do. He used to tightening wire spoke wheel rim as; the same time, the use made of thin steel bars to the frame, the car's front wheel larger smaller rear wheel. Thereby recing some of its own weight bicycle. Starting from Xifulake until Renault, who made 5 types of bike with a larger difference between the modern bicycle.
Truly modern form of bike is born in 1874. British Roson in the year, the ingenuity in the bicycle chain and sprockets on the uploading, with rear-wheel rotation to drive the car forward. But still the big front wheel, rear wheel small, do not seem as coordinated and unstable.
In 1886, the United Kingdom John. K. Stahly, a mechanical engineer, from the mechanics, kinematics point of view to design a new bike style bicycle fitted with a fork and brakes, front and rear wheel size the same in order to maintain balance and control into diamond-shaped steel frame for the first time using a rubber wheel. Stahly not only improves the bike's structure, but also restructured a number of machines used in proction of bicycle parts for bike's mass proction application of interest to promote the prospects opened up wide, and he was later known as the "father of a bike." Stahly bike designed with today's models look basically the same as a bicycle.
In 1888, Ireland's veterinary Dunlop, from the expansion in the treatment of bovine Stomach inspiration, he used to water the garden around the house in a rubber tube into a round stick, play full of gas, mounted on bicycle wheels, to participate in Cycling competition, actually among the best, has aroused great interest. Pneumatic tire is a landmark in the history of bicycle development initiative, it increases the flexibility of the bicycle, not because of road roughness and vibration; the same time greatly improve the speed and rece friction with the road wheels. Thus, fundamentally changed the bike's riding performance, improved bicycle use function.
Also 1888, Coventry City, John. K. Stahly proced the first modern bike --- a "safety" bicycle. Its main characteristic is using diamond-shaped frame, so the body has a higher stiffness and strength, the rear wheels with a chain drive, and take direction directly through the front fork. 自行车是最成功的人类发明，人类机，是由许多简单机械组成
复杂的机器。
1790年，有法国人，他对大脑的爱。有一天，他走在巴黎街头，因为世界上比前雨，路上的雨水积了很多，这是好去。突然，一辆马车从后面开门见山，道路很窄，很宽的运输，Xifulake幸运不要隐瞒，以免被车撞了，或者被溅了泥，下雨。别人看到，觉得对不起他，但也生气，支马，想哭马车停了下来，不合理的陈述。 Xifulake已喃喃地说：“不要哭，不要哭，让他们走。”马车走了，他只是站在路边。他在想：路这么窄，这么多的行人，为什么不能教练什么结构，以便利一些变化？应切断沿四个轮子的马车的一半，成为一个前后两个轮子的... ...他这么想着，手上的家庭设计。经过反复试验，在1791年第一架飞机旅行的“木马轮”开出的车。这辆木头车围在中间有两个连接梁，一台高级安全像玩具似的，车轮。当汽车还没有驱动器骑手链，在他们的腿力量踏板，车子可以前进缓慢，但也没有方向盘的车，只能走直线，不转了，去一出汗就累了，而骑。
在刚刚出现的新东西并不总是那么完美。 Xifulake并不气馁，他继续设法改善。不幸的是，长期患病，他死了。
1816年，在德国有在树林里看到他的名字是delaxis，他每天，这从林一东，西徘徊的另一块木头，年复一年。他想：如果人在车内坐着，走走停停，任何地方，不是很漂亮吗？ Delaisse开始制作木轮，使几乎像Xifulake。然而，增加对儿童的车把控制方向，方式的转变，提出了前轮。但自行车仍然是使用两只脚，什么步骤，蹬地，推动车滚滚向前。当骑乘时间进行测试干了沿途许多人都在笑。尽管如此，他热爱他的这一创作“可爱的小马崽。”在游荡时，一个周期通过开放马车干燥后，司机在他的车笑了，他缓缓地说，他和司机说：“信不信由你，我的车比你的马”，所以他们二人玩赌。距离西，东港村一个来回，结果干燥速度超过了一个多小时司机整个更多。
1840年，英格兰的铁匠麦克米伦，并得到了破旧的“可爱的小马崽。”他安装在后轴曲柄，然后曲柄连杆连接踏板的前面，正面和铁，大前，后方的小后轮。当骑手分级的固定踏板，该车将在自己的宣传活动起来，向前跑。因此，它使离地面骑手的脚真的，走路，交替进入滚轮，步进移动速度大大提高。 1842年，麦克米伦坐这车，跑了20公里的一天，因为他们不关心，骑车太快，上路了一个小女孩，这是警方抓住，并罚款。指控的“残酷的旅程。”
1861年，法国的米肖父子，原本是马车修理匠的工作，它们可以安装在脚踏板转动前面;车以上前轮鞍架，因此除非自行车的技术，特别是复杂的，或在不稳定抓车把，从车上摔了下来。他们这辆两为“自行车”的詹姆斯轮车，并在巴黎博览会展出，观众大开眼界1867年。
1869年，英国在看到雷诺在法国的自行车，那车太重，开始琢磨怎么点的自行车数量做。他用收紧线辐轮辋的，同一个时间，使薄钢筋使用框架，汽车的前轮大后轮小。从而减少自身重量自行车一些。从Xifulake起至雷诺，谁取得与现代之间的较大差别，自行车5自行车类型。
真正的现代形式的自行车是出生于1874年。英国人罗松在这一年里，在自行车链条和链轮上载独创性，与后轮驱动车旋转前进。但仍是前轮大，后轮小，看起来不够协调，不稳定。
1886年，英国约翰。光斯塔利，机械工程师，从力学，运动学角度来设计一个新的自行车款式的自行车用叉子和制动器，前后轮大小相同的安装，以保持成菱形钢架平衡和控制首次使用橡胶轮子。斯塔利不仅提高了自行车的结构，而且还调整了在自行车零件生产自行车的群众利益，促进发展前景的生产应用程序中使用的机器数量开辟了广泛的，他后来被称为“自行车之父”。斯塔利自行车与今天的模式设计的外观基本相同自行车。
1888年，爱尔兰的兽医邓洛普，从在牛胃吸入治疗扩张，他用的水成圆棍围绕在一个橡胶管家的花园，发挥中气十足，架在自行车轮子，参加自行车竞争实际上名列前茅，引起了极大的兴趣。充气轮胎是在自行车发展史上具有里程碑意义的倡议，它增加了自行车的灵活性，不要因为路面平整度及振动，同时大大提高了速度，降低车轮与路面摩擦。因此，从根本上改变了自行车的骑行性能，提高自行车的使用功能。
此外1888年，考文垂市，约翰。光斯塔利生产出第一台现代自行车---“安全”自行车。其主要特点是采用菱形车架，所以身体具有较高的刚度和强度，用链条驱动后轮，并通过直接的前叉方向。