Ⅰ 求3篇400字左右的英語短文（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. 進化與輪子
從前，研究自然界沒有輪子的進化論生物學家都同意不能用無此需要來解釋這種現象：輪子對於動物會像對於我們人類一樣有好處。 生物學家們推論，動物沒有進化出輪子是由下述困難所致：動物身上的活細胞通過血管與心臟相連，通過神經與大腦相連。 因為一個旋轉的接頭對輪子來說是至關重要的，由活的細胞構成的輪子在第一次轉動時便會扭傷其上的動脈和神經的連結，因而不現實。
不過，動物未能進化出輪子是受阻於無法解決接頭問題的說法有一個缺陷。 這種理論無法解釋為何動物沒有進化出由死組織構成的而無需動脈和神經的輪子。 包括人在內的無數動物都有一些沒有血液供應和神經的體外構造，例如，我們的頭發和指甲，或者鱗片、爪子和其它一些動物的角。為什麼老鼠沒有進化出類似於滑輪溜冰鞋的骨質的輪子呢?在某些情況下，爪子可能比輪子更有用，但貓的爪子是可以伸縮的： 為什麼不能有可以伸縮的輪子呢?這樣，我們便得出了一個被戲稱為RRR 的嚴肅的生物學悖論：大自然未能產生出有可伸縮的滑輪溜冰鞋的老鼠。
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是我們班上最勤奮的學生。他也是我的一個朋友。實際上，他和班上的同學相處的都很融洽。也許過好長時間他才只是花5分鍾或10分鍾和你聊天，但是他的談話充滿了活力和熱情，而且他喜歡和你分享他的思想和想法。他是誠實的，他不會無謂的浪費他的時間和精力。在教室里，他從沒有顯得睏倦或是疲憊。他常常會按時交作業，考試中也會取得好成績，然而他仍會有時間踢足球和練小提琴。我羨慕他，我希望自己能象他那樣勤奮。John是個執著、專注、充滿活力的人。
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 英語作文：描述一下汽車結構（100字以內)
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.
行嗎?
Ⅲ 以發明為題的英語作文關自行車和電腦的
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 英語作文:我最喜歡的玩具汽車
收到！望採納！
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「最尷尬的時刻」的英語作文
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 英語自行車的發明作文
【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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五星級回答，一定要採納哦，不要辜負我的辛苦勞動！
【來自英語牛人團】
Ⅶ 備戰高考英語典型範文…萬能作文
汽車進入普通中國家庭
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 (停車場) and costly maintenance (保養)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 英語作文A special gift I got 60個字。。。。。。急啊，半小時之內給我答復!!!!!!!!!!!!!!!!!!!!!!!!
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 關於自行車作文
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. 自行車是最成功的人類發明，人類機，是由許多簡單機械組成
復雜的機器。
1790年，有法國人，他對大腦的愛。有一天，他走在巴黎街頭，因為世界上比前雨，路上的雨水積了很多，這是好去。突然，一輛馬車從後面開門見山，道路很窄，很寬的運輸，Xifulake幸運不要隱瞞，以免被車撞了，或者被濺了泥，下雨。別人看到，覺得對不起他，但也生氣，支馬，想哭馬車停了下來，不合理的陳述。 Xifulake已喃喃地說：「不要哭，不要哭，讓他們走。」馬車走了，他只是站在路邊。他在想：路這么窄，這么多的行人，為什麼不能教練什麼結構，以便利一些變化？應切斷沿四個輪子的馬車的一半，成為一個前後兩個輪子的... ...他這么想著，手上的家庭設計。經過反復試驗，在1791年第一架飛機旅行的「木馬輪」開出的車。這輛木頭車圍在中間有兩個連接梁，一台高級安全像玩具似的，車輪。當汽車還沒有驅動器騎手鏈，在他們的腿力量踏板，車子可以前進緩慢，但也沒有方向盤的車，只能走直線，不轉了，去一出汗就累了，而騎。
在剛剛出現的新東西並不總是那麼完美。 Xifulake並不氣餒，他繼續設法改善。不幸的是，長期患病，他死了。
1816年，在德國有在樹林里看到他的名字是delaxis，他每天，這從林一東，西徘徊的另一塊木頭，年復一年。他想：如果人在車內坐著，走走停停，任何地方，不是很漂亮嗎？ Delaisse開始製作木輪，使幾乎像Xifulake。然而，增加對兒童的車把控制方向，方式的轉變，提出了前輪。但自行車仍然是使用兩只腳，什麼步驟，蹬地，推動車滾滾向前。當騎乘時間進行測試幹了沿途許多人都在笑。盡管如此，他熱愛他的這一創作「可愛的小馬崽。」在游盪時，一個周期通過開放馬車乾燥後，司機在他的車笑了，他緩緩地說，他和司機說：「信不信由你，我的車比你的馬」，所以他們二人玩賭。距離西，東港村一個來回，結果乾燥速度超過了一個多小時司機整個更多。
1840年，英格蘭的鐵匠麥克米倫，並得到了破舊的「可愛的小馬崽。」他安裝在後軸曲柄，然後曲柄連桿連接踏板的前面，正面和鐵，大前，後方的小後輪。當騎手分級的固定踏板，該車將在自己的宣傳活動起來，向前跑。因此，它使離地面騎手的腳真的，走路，交替進入滾輪，步進移動速度大大提高。 1842年，麥克米倫坐這車，跑了20公里的一天，因為他們不關心，騎車太快，上路了一個小女孩，這是警方抓住，並罰款。指控的「殘酷的旅程。」
1861年，法國的米肖父子，原本是馬車修理匠的工作，它們可以安裝在腳踏板轉動前面;車以上前輪鞍架，因此除非自行車的技術，特別是復雜的，或在不穩定抓車把，從車上摔了下來。他們這輛兩為「自行車」的詹姆斯輪車，並在巴黎博覽會展出，觀眾大開眼界1867年。
1869年，英國在看到雷諾在法國的自行車，那車太重，開始琢磨怎麼點的自行車數量做。他用收緊線輻輪輞的，同一個時間，使薄鋼筋使用框架，汽車的前輪大後輪小。從而減少自身重量自行車一些。從Xifulake起至雷諾，誰取得與現代之間的較大差別，自行車5自行車類型。
真正的現代形式的自行車是出生於1874年。英國人羅松在這一年裡，在自行車鏈條和鏈輪上載獨創性，與後輪驅動車旋轉前進。但仍是前輪大，後輪小，看起來不夠協調，不穩定。
1886年，英國約翰。光斯塔利，機械工程師，從力學，運動學角度來設計一個新的自行車款式的自行車用叉子和制動器，前後輪大小相同的安裝，以保持成菱形鋼架平衡和控制首次使用橡膠輪子。斯塔利不僅提高了自行車的結構，而且還調整了在自行車零件生產自行車的群眾利益，促進發展前景的生產應用程序中使用的機器數量開辟了廣泛的，他後來被稱為「自行車之父」。斯塔利自行車與今天的模式設計的外觀基本相同自行車。
1888年，愛爾蘭的獸醫鄧洛普，從在牛胃吸入治療擴張，他用的水成圓棍圍繞在一個橡膠管家的花園，發揮中氣十足，架在自行車輪子，參加自行車競爭實際上名列前茅，引起了極大的興趣。充氣輪胎是在自行車發展史上具有里程碑意義的倡議，它增加了自行車的靈活性，不要因為路面平整度及振動，同時大大提高了速度，降低車輪與路面摩擦。因此，從根本上改變了自行車的騎行性能，提高自行車的使用功能。
此外1888年，考文垂市，約翰。光斯塔利生產出第一台現代自行車---「安全」自行車。其主要特點是採用菱形車架，所以身體具有較高的剛度和強度，用鏈條驅動後輪，並通過直接的前叉方向。