Write a rebuttal paper, the number of words in grade three is about 400-500, and the topic is not limited. Thank you, don't be afraid of difficulties.

Once upon a time, there was a snail who wanted to achieve great things, but he was afraid of the difficulties that hindered his progress. In the end, instead of making great achievements, he became the laughing stock of others after dinner. (straight to the point)

I think if you want something ... life has always been a tortuous and long journey-there are desolate deserts and deep valleys; There are both high mountains with horizontal resistance and rapids with broken circuits. Life has always been a vast world, and flowers will never bloom. There will also be wind knives, frost swords and ice and snow road closures. Life has never been just colorful dreams, brilliant flowers and successful smiles; It will also have sour tears, locked brows, wandering footsteps, heartbroken bitter wine ... Life is a long and arduous voyage, and there are both sails and unyielding backbones in adversity. The key depends on how you steer your own boat of life. A man walking at night hit a stone and had a bad fall. He stood up, rubbed his sore knee and walked on. He walked into a dead end. There is a wall in front, a wall on the left and a wall on the right. The wall is only one head taller than him, and he can't climb it with great effort. Suddenly, he had a brainwave and remembered the stone that tripped him just now. Why didn't he move it and put it under his feet? As soon as he thought about it, he turned back, removed the stone and put it under the wall. He climbed up the wall smoothly, and with a slight jump, he reached through the wall. Everyone will encounter adversity, but more people will never get up after stumbling over a stumbling block, let alone turn a stumbling block into a stepping stone. Frustration is like a stone. "For the weak, it is a stumbling block, which makes you hold back; For the strong, it is a stepping stone to make you stand more stable and higher. ...

Excuse me: Who in the world can avoid detours? Which one didn't meet with difficulties. Fight with all your courage and strength as a human being. Struggle will make you get rid of difficulties smartly, create a new self and make your life brilliant.

Don't dream of writing a rebuttal paper of about 600 words on the topic of frugality is meanness. Other people's articles are not that cheap,

Chekhov wrote a famous 400-word refutation paper on "have it both ways": "Puppies should not panic because of the existence of big dogs, and all dogs should bark loudly-just cheer loudly according to the voice given by God."

We are not dogs, but more advanced humans. So for us, it is not just a few phone calls that can solve the problem. We should "call" with the thoughts endowed by nature so that people all over the world can hear it. The so-called "big dog" naturally refers to authority, and challenging authority is tantamount to teaching fish to swim. However, is it really worth laughing at teaching fish to swim?

I said, of course not! Not only can't you laugh, but you want to "teach fish to swim".

First of all, it's not too much teaching fish to swim. If society wants to make progress and human beings want to develop, we should not only rely on the thoughts and achievements of our predecessors, but should actively think and make bold innovations. If a person has made new development or created a new theory, but he dare not challenge authority, dare not face the gossip of the world, dare not show his ugliness and dare not look back, then the development of human civilization will go backwards for many years. Imagine, if Galileo chickened out and gave up the idea of going to the Leaning Tower of Pisa to do a double-ball falling experiment, how many years would Aristotle's wrong remarks rule? If Copernicus was afraid of the suppression of church forces and did not dare to publish Heliocentrism's paper, what would be the procedure of human astronomy? Without these people who dare to teach others to swim, it will be difficult for society to progress.

Recently, a friend came to see me, told me about his depression, and talked about whether an honest man suffered.

This friend has been doing things honestly all his life, being a clean and honest person. When he was young, it was because of his honesty and kindness that he was taken by lovers and chose this honest man among several competitors. At that time, the leader praised him and his colleagues praised him, and he was proud of it. He firmly believes that honest people will not suffer losses and will be respected by others.

Today, more than 30 years later, I don't know why, honesty has been trampled on, and honest people are considered incompetent, stupid and enterprising. It seems that honest people in today's society can't keep up with the times. Even this friend's wife said he was too honest. He has made no progress for decades. He worked hard all his life and worked hard. What did he get? His wife also reminded his daughter not to look for an honest man like her father when looking for trouble, because she would suffer and be uninterested all her life.

After listening to this friend's frank heart, I feel the same way, and I don't know where to start. After a moment of meditation, I sincerely said, "each of us has strengths and weaknesses. The weakness in life is often that we hope to get it and are afraid of losing it." It is in this state of mind that some people cheat, cheat on their superiors and deceive their subordinates, and live in fear all day, which is why they are so tired and uncomfortable. Honesty makes people make up for weaknesses and shortcomings, so as to forget gains and losses, surpass themselves, get rid of troubles, be open-minded and live a relaxed life. I always believe that honesty is the foundation of being a man, doing things and being a treasure of character. The society needs a large number of honest people who are loyal and honest, love their jobs, treat others sincerely, regardless of personal gains and losses, work hard and contribute silently. Our socialist construction is supported by a large number of such honest people. Without groups of honest people who don't get paid and are willing to suffer losses from generation to generation, society can't be stable and history can't move forward. "

This friend listened to my words and smiled with satisfaction. After a while, he asked inexplicably, "So, will honest people suffer?"

I bluntly said: "As long as we are worthy of the party and the people, our family and friends, and our own conscience, it is enough. What's more, in the tide of market economy, those who can stand the test of any wind and waves and eventually become big players are often honest people who win the trust with sincerity. Practice has proved that some people suffer from dishonesty. Speculation, have it both ways, sense motive, flattery, versatility, hypocrisy, deception ... Maybe you can succeed for a while and get what you want, but in the end you will fail and get the punishment you deserve. Because lies and disguises can't stand the test of facts and history, they will be exposed in broad daylight. In today's society, it is especially necessary to create an atmosphere and mechanism that respects, cares for and cherishes honest people, does not let honest people suffer, and encourages everyone to work hard to be honest people. Only in this way can society have hope. "

When I left, I said with infinite emotion: "A person's level is high and low, and his ability is great and small, but as long as he tells the truth, does honest things and is honest, he is a noble person, a moral person and a person who is beneficial to the people. I am willing to be such an honest man all my life, no regrets! "

Write an expository article about "Bicycle", the topic is not limited, the number of words is about 500 words, and it is junior high school level! I. Rolling bearing in flywheel

There are a set of rolling bearings on the left and right sides in the flywheel, and each set of rolling bearings consists of steel bowls, steel balls and steel blocks. Steel bowls are made directly on the left and right inner sides of the jacket, which means that there is a circle of very smooth fairways on each inner side of the jacket. The steel block on the left side of the rolling bearing is flat and riveted firmly with the iron core. The steel block on the right side of the excitation bearing is a screw block. The inner diameter of the screw block is processed with M39x l thread and screwed on the iron core. The thread of the screw seat is left-handed (reverse tooth). In order to facilitate the disassembly and assembly of the steel wire stopper, two circular concave tips are machined on its outer end surface. The steel ball in the flywheel is relatively small; There are many steel balls in the flywheel, reaching 106 or 1 14. Some flywheels are also equipped with isolation rods. Gasket diameter is 42 inches. 5 mm and 8 mm long steel cylinders. Spacer bars and steel balls are installed on the fairway at intervals. In fact, the spacer acts as a ball rack and distributes the steel balls evenly in the flywheel. Flywheels equipped with spacer bars can save more than two thirds of steel balls. There are only 32 steel balls and 32 spacer bars in the flywheel. When the number of steel balls is less, the contact points of the key ball with the steel bowl and key block are less, thus improving the sensitivity of the rolling bearing. In order to adjust the clearance of the rolling bearing, the flywheel gasket is also installed between the iron core and the thread stop.

The rotating relationship of the rolling bearing in the flywheel is that both the flat gear and the linear gear are installed on the core, and the core is installed on the rear axle component. When the bicycle goes forward, the core

The flat gear and the line gear rotate together with the rear wheel. The outer sleeve can rotate relative to the core, the flat block and the threaded block, that is, relative to the rear axle assembly.

2. Ratchet and pawl in flywheel

The coat has an inner ring of teeth and external teeth. The external teeth are meshed with the chain; The internal teeth mesh with the jack. Each flywheel has two jacks, both ends of which are installed in cylindrical grooves on both sides of the iron core. The jack rotates around the end of the cylinder. The tooth tip of the jack is supported by the jack spring and engages with the internal teeth of the sheath. The jack spring is made of spring steel wire with a diameter of only 40.3-0.35mm, and the jack spring is located in the small hole at the bottom of the core groove of section AB (the small hole is opposite to the cylindrical tip of the jack). The other is in the groove on the back of the jack.

Third, the car strip.

The track connects the front uranium component or the rear uranium component with the rim. It consists of spokes, bars and bars. One end of the spoke is a big head, and the big head is curved, almost perpendicular to the long bar. When installing, the big head is buried in the head-on holes of the left and right dials; The other end of the strap is threaded and connected with the strap on the vehicle. The bus bar is made of copper alloy, which can prevent the spokes and rims from rusting. It is made of thin iron sheet, which has the same shape as the inner wall of the automobile drawing and can completely fit the inner wall of the automobile. The strip-shaped pad can disperse the strip-shaped pulling force to the edge and not concentrate on the edge of the strip-shaped hole. At present, only thicker spokes are equipped with pads.

1. Press-fit valve

The middle of the valve body runs through, and there is a frustum inside to match with the valve core; The upper end of the valve core is provided with two symmetrical grooves, and two convex ribs of the valve core are installed in the grooves; Its outer diameter is threaded, at the same time, there are two parallel wrench planes on both sides of the thread, and its lower part has a chassis, which is left in the inner tube during assembly, and the rest is exposed outside the inner tube. The hexagon nut clamps the inner tube between the valve body chassis and the valve washer, so that the gas in the inner tube will not leak from between the valve body and the valve washer. If the valve washer is disc-shaped, the disc mouth is pressed against the inner tube, and the hole in the middle is not circular, but the two sides are parallel, which is completely consistent with the cross-sectional shape of the valve body (the two sides of the valve body are processed into parallel planes), so that it is impossible for the valve washer to rotate when sleeved on the valve body, which plays a role in preventing loosening. The main function of the round lock nut is to fix the valve on the rim. The valve hose is a small round tube made of latex with good elasticity. When in use, it is sleeved outside the valve core, covering the small air holes on the frustum top and the valve core. The frustum of the valve core is matched with the frustum in the valve body, and the valve hose is separated in the middle. When the air compressor nut is tightened to press the valve core, the valve hose is compressed, so there is no possibility of air leakage between the two frustums. There is an air passage in the middle of the valve core, but the small end of the valve core is sealed. In order to let gas into the inner tube, there is a small air hole on the valve core. When the inflator delivers gas to the valve core, the gas expands the valve hose wrapped outside the valve core through the air hole, and enters the valve body and the inner tube from the gap between the valve hose and the valve core; When the air pump stops conveying gas, the elasticity of the valve hose and the air pressure of the inner tube immediately make the valve hose contract and seal the air hole on the valve core. In order to prevent dust or fine sand particles from entering the valve core, a plastic or metal dust cap is also installed on the valve core.

The chain parts are installed on the sprocket and flywheel. The chain transfers the pedal force from the crank sprocket to the flywheel and the rear wheel to push the bicycle forward. The chain consists of many external parts and internal parts, which are connected into a long string by pins. The pin shaft and the outer part are pressed into a whole, and there will be no relative rotation between them. There will be relative rotation between the inner plate and needle uranium. Because the inner part has a gasket and there is a gap between the pin shaft and the gasket, there is no gap between the inner part and the gasket (pressed into a whole). In addition, a roller is installed outside the washer, which can rotate around the washer. When the bicycle moves forward, the roller contacts the teeth of the sprocket or flywheel. In order to increase the hardness and wear resistance of pin uranium, liner ring and roller, they are all carburized and quenched. The chain is equipped with a detachable movable joint, which is specially used to facilitate the installation and disassembly of the chain. Movable joints consist of uranium joints. The joint shaft is equivalent to two pins fixed on the outer piece. The joint piece is equivalent to the outer piece. The two ends of the spring plate are clamped in the groove at the end of the joint shaft, so that the quick-acting joint will not loosen. The distance between two uranium sales centers is called chain pitch.

Write a 100 word refutation of "Reading Bitter" When I was a child, I grew up with the poem "How can I sweat when weeding at noon?" Every time I pick up a book and look at the dead square characters, I always shout so boring. Reading is my biggest headache.

Write a composition entitled: My Spring Festival, with about 400 words. My spring festival

During the Spring Festival, the streets are crowded with people, and men, women and children are smiling and enjoying the festival. Firecrackers make a thunderous sound overhead, and fireworks are blooming in the sky, including red, green, yellow and purple ... it's really colorful!

On New Year's Eve, my cousin and I stayed at my grandmother's house. Because there are many firecrackers in grandma's house, we all live in grandma's house, because we want to smell the fragrant firecrackers. After dinner, adults are chatting. At night, from time to time, several families will light fireworks and put them in the sky; Sometimes a few naughty children join in the fun and throw their guns on the ground, making the earth scream in pain. The sky in Qian Qian is full of colorful sparks, and the lights on the ground are all red. Suddenly thought of a poem: firecrackers every other year, the spring breeze in send warm into Tu Su. Thousands of families always trade new peaches for old ones. Look again, all kinds of fireworks are shining everywhere in the southeast and northwest. "whew!" With the crisp sound, fireworks are spouted like fountains with beautiful long tails, some of which are like a group of small stars, and then slowly become colorful lines and slowly fall down; Others fly to the sky like colorful flowers, and scatter flowers like fairies. There seems to be a big garden before my eyes. When every flower blooms, we will give a surprise cheer. We danced around colorful fireworks, and our happy mood was as warm and colorful as fireworks!

I am one year older and should be more sensible. With the sound of firecrackers, we ushered in the biggest festival of China people-Spring Festival. Everyone is beaming, hanging red lanterns and posting red Spring Festival couplets. They are very busy. ...

500 words to refute. Thank you, a784094675. 500 words to refute. Thank you.

y7

Why don't you write a rebuttal article yourself? Here I offer some personal opinions for the landlord's reference.

1, people have nothing to do with words.

2. Don't stick to finding examples.

3. Inferred from the point of view of the word as its name implies, the words written by great men or handsome men look good. Attack it.

4. Draw fallacies and make people laugh. Laughing with sharp words is like a sword giving a fatal blow to an opponent.

Generally speaking, it is similar to a debate. It's just not a face-to-face debate, but an armchair strategist.

Thrift is to refute the stingy person with about 500 words, and it is the creature that dominates the earth; Man is a masterpiece of nature; Mankind has created and discovered countless knowledge and resources. However, sometimes people are also the chief culprit in destroying everything, because human beings sometimes don't know how to save.

Saving is not an unattainable thing. As long as we start from the small things around us, save a piece of paper, save one degree of electricity, save a drop of water, every little makes a mickle, improve the natural environment and benefit the earth and mankind.

Waste is actually around us, but we don't realize that it is a waste. For example, we used a piece of paper today, used one degree of electricity today, and used several milliliters of water today. Although these may be trivial to say, if many a mickle makes a mickle and a lot of resources are wasted, it is not difficult to imagine that the earth is full of garbage, stinking, the water is black and the sky is brown. A large number of animals died and eventually became extinct.

What a chill!

In order to avoid this tragic situation of over-exploitation, we should try our best to save and cherish all the resources around us.

First of all, we should start with saving paper. Most of the paper we use now is wooden paddles. As the name implies, wooden paddles are pulps made of tree fibers. According to the statistics of scientists, cutting down a tree can only make three or four packs of napkins. Considering the napkins we need every day, it's amazing that a dozen people may use so much in one day. So, we always want some pieces of paper. Why not use a rag or handkerchief instead? Even if you don't use it, don't use two or three sheets of paper just by wiping your mouth.

Next, it is about saving water resources. Water is the most essential thing in human life, so the demand of human beings is particularly great. Because of this, we must save water. Although the earth looks like a sphere surrounded by water, only 0.3% of the water resources are edible. Don't squander water resources just because they are renewable. It takes hundreds of years to regenerate. At the same time, other creatures on the earth also need water. Turn off the tap, water the flowers with deep rice, and try to replace the bath with a bath ... these tiny details can save water. I once read in the newspaper that a dripping faucet wastes 17 bathtub water in a year. Shanghai is short of water, China is short of water and the earth is short of water. Don't waste any more water, or there will be too much.

Also, save electricity. Turn off the lights when you go out. Unplug the unnecessary power plug; Turn on the air conditioner less and open more windows ... There are many ways to save electricity, just don't waste it.

There are many similarities between waste and saving, but the results are completely different. Saving will make the earth better and the earth will be destroyed. As a masterpiece of nature, people should all know which one to choose.