Animals have different tails. They are long, short, thick and thin ... they have different functions, some can keep balance, some can master the direction, and some can repel mosquitoes.
Kangaroo's tail is about 120cm to 130cm long. Its tail is about the length of a skipping rope. When resting, this tail can support the body, and when jumping, it can help it jump more than 10 meters. And when in danger, kangaroos can also attack enemies with their tails.
Gecko's tail is slender and slender. When it is pulled by external force or hurt by the enemy, the tail muscles will contract strongly, which can make the tail break immediately and save the day. Its tail plays an active role in vertical climbing and sliding, and can also store fat.
The tail of a fish is as important as the rudder of a ship. When swimming, you can master the direction and speed by your tail. On the other hand, tuna is the fastest in the ocean, reaching a speed of 70 kilometers per hour, which is similar to the speed of a car.
The tiger's tail is colorful and very beautiful. Seen from a distance, it looks like a yellow and black ribbon. But when this tail is put on the tiger, it becomes a hunting weapon. The bones in the tiger's tail are hard and can be used as whips, about half a meter long. If you hit them at once, you can directly tear off the spine of small mammals.
The leopard's tail looks like a yellow scarf. Leopard is famous for its fast running speed, and its explosive power can soar its speed to 300 kilometers per hour, which is faster than ordinary cars. The role of the tail is reflected. Its tail can help keep balance. If the leopard breaks its tail, it may starve to death because it can't run fast, resulting in no food.
Animal tails are really strange, and there are many mysteries in nature waiting for us to explore!
I have loved cats since I was a child. Although the cat at home has been transferred to others, when I see the wild cats in the community, I will recall the scenes of playing together before.
The cat has a beautiful appearance, a round head, a pair of pointed ears and big eyes like two night pearls. A cat's beard plays a great role in sensing the surrounding environment, just like a moving ruler, helping it to judge the size of a mouse hole.
There are many kinds of cats, among which the most expensive cat is called "Ashra", which is a hybrid cat of many varieties. It was bred by Boomon Brody, a British pet dealer, in 20xx, and the price of each cat was 6.5438+0.2 million pounds, about 24,000 US dollars.
The cat's reaction is very agile. When it sleeps, if you approach it slowly, its ears will move. If you continue to approach it, it will immediately open its eyes and look at you with fierce eyes. If you don't know someone, it will immediately stand up, hunch its back and make a defensive posture. If you continue to approach it, it will raise its tail and growl until it scares you away.
Cats can eat a lot of food: cat food, goat milk powder, fish ... In the past, cats all ate fish bones, unlike wild cats now, they can eat cat food given by good people and drink water.
A cat is a naughty little animal. Playing with chicken feathers all over the floor can kill it, and it will be more exciting to see wool balls. So cute!
The life span of cats is generally 1~ 15 years for males and 1~ 17 years for females. A cat can have three or four babies at a time, and at most six or seven babies.
Cat owners should be kind to them and love them as their own children. People who don't own cats should also be kind to them. After all, it is also a fresh life.
Cactus is a strange tropical plant with strong vitality.
Potted cactus, its indomitable character is very surprising, it doesn't care whether there is water, whether the weather is hot or not, whether it is cold or not. Its green body has palm-shaped stems covered with hard thorns, and it grows like a pyramid. A piece of "green palm" has a piece of "little green palm", which makes people have a lot of reverie. It looks like this everywhere. In the hot and long drought summer, other potted plants have bowed their heads, but cactus looks up at the blue sky like a soldier; In the severe winter, other potted plants have already been brought back indoors by their owners, but cactus has experienced wind and rain and is not afraid of the surrounding environment. It never pays attention to it. It has been rooted all its life, as if to say, "This place is really nice. Let's grow up here! " The immortal is covered with hard thorns, and any wild animal will stop at once when it sees it. Pests want to bite it, and their bodies are always full of holes. As soon as the green cactus came out of the ground, everyone thought it was dead. No, if you do this, it's wrong. It uses the nutrients of the body to take root and sprout and cultivate a young cactus. This is the real "rooting". Who can match its tenacious vitality? This seemingly ordinary plant, who would have expected, will produce beautiful flowers, just like colorful tassels on a samurai helmet.
Cactus is a tropical plant. It is shaped like a palm, hence its name. It is not afraid of heat, that is, the temperature is as high as 40 degrees Celsius, and it can survive tenaciously without drinking water for several days.
I have seen many TV advertisements, and my favorite is the public service advertisement of "protecting birds" inserted in CCTV's "Big Windmill" column.
In a big forest with birds and flowers, there is an old tree, and there is a beautiful nest on the high branch, where four little orioles live. Under the careful feeding of the little oriole mother, the little oriole has grown up, it's time to fly, and the chicks are playing happily. Suddenly, a black gun stretched out from a piece of green grass and aimed at a small oriole. Only one shot was heard. When the little oriole reacted and tried to fly away from the branch, it was too late. Its beautiful feathers were interrupted by bullets, so it couldn't fly high. It fell to the ground and the little oriole blinked.
This advertisement deeply shocked me. Birds and other animals living on the earth are friends of human beings. Why can't we live in peace with them? If we catch and kill indiscriminately for a long time, we will lose the best forest doctor and lead to the spread of pests. The earth where human beings live will definitely lose a lot of green. If we don't protect birds, I'm afraid we'll never see the picture of innocent girls in the park again. There are "flowers" but no "birds". The park naturally lost its original wildness and vitality.
I sincerely hope that all students will look at this public service advertisement, publicize the importance of protecting birds, and turn slogans into actions. I believe that with the joint efforts of the whole society, we will be able to "have birds singing everywhere around me" in the future.
Nanjing is the ancient capital of the Six Dynasties and the venue of the 20xx Youth Olympic Games. As the host, I'd like to introduce a scenic spot in Nanjing-Ming City Wall. The ancient city wall of Nanjing was built in the Ming Dynasty, and the circumference of the inner city alone reached 33. 7 kilometers, the specific circumference is only 29. The 5-kilometer-long Paris wall is still very long. The ancient city wall was built by Zhu Yuanzhang in four stages ***2 1 year after three years of preparation. In order to build the ancient wall of Nanjing, Zhu Yuanzhang ordered five provinces and twenty states 1 18 counties to burn city bricks. In order to ensure the quality, each brick should be marked with the name of the state, government, county, craftsman and manufacturing supervisor. If it is unqualified, it will be returned and redone, and if it is unqualified, it will be punished. It can be seen that it is very strict These city bricks are 40 ~ 50 cm long; The width is about 20 cm, and the thickness is not less than 10 cm. A total of about 350 million pieces. These figures also show the grandeur of the Ming city wall.
Nanjing City Wall is a masterpiece of China's ancient military defense facilities and wall-building technology. No matter its historical value, ornamental value, archaeological value, architectural design, scale and function, the city walls at home and abroad can not be compared with it. This is another historical miracle after the Great Wall in Wan Li. There are towering towers above the Ming City Wall 13 City Gate, and Jubao Gate is the most magnificent. The three gates of Jubao, Sanshan and Tongji each have four city walls, and the space between each two is called "Wengcheng", which can be used for wartime defense. Jubao Gate is the strongest of these gates. The lower part of the tower is basically intact, and there is a special facility called "Tibetan Army Cave". In fact, the "Tibetan Army Cave" is a brick door with a closed inner end, which can be used for soldiers to rest and store military supplies in wartime. There are two layers of *** 13 "Tibetan Army Cave" on the southernmost wall of Jubaomen, and there are seven layers on the lower part of the left and right walls, totaling 27 layers. It is said that each cave can accommodate 100 soldiers, and * * * can hide more than 3,000 soldiers. This facility was extremely rare in other big cities in ancient China.
Every city gate has two doors, inside and outside, and the outside is a "thousand-pound gate" descending from the top of the city, which has a solid defensive role; There are two doors made of wood and iron inside. Usually, pedestrians, cars and horses all pass through the hole in the city gate. The Ming city wall has a long history and is the pride of Nanjing people!
Fan Wen 6 is fat and strong, walks unsteadily and breathes stupidly. What is this guy? Pig! What a one-year-old child knows. Indeed, pigs are often remembered as stupid, lazy and dirty. Even Pig Bajie and Daxian in Journey to the West are so virtuous. In fact, judging from the domestication process of pigs, pigs are smart and lovely animals.
A pig is considered stupid because of its fat body. But despite its ugly appearance, some of its intelligence is not even comparable to that of dogs! Scientists conducted a series of tests on pigs, such as dancing, pulling water and opening doors. It is difficult for pigs to learn all the demonstrations at once, while dogs can only learn them nearly ten times. Now, the pig has boarded the circus and performed better than the dog.
The pig's eyesight and hearing are not very strong, but its sense of smell is better than that of the poodle. So someone trained the pig to hunt, and it could smell the prey more than 20 meters away. Life after training can also help to find food underground.
Scientists also found that pigs are not born dirty. There are not many sweat glands on pigskin, so in order to dissipate heat on a hot day, I like to soak in water; Because we couldn't find clean water, we had to soak in muddy water. Pigs also know hygiene. They always leave the vent as far away as possible so that they can take a shit and pee. It's just that people keep it in a pigsty, so it's dirty. Pigs are very selective about eating and will never eat anything they don't like. It also knows how to eat less and eat more, chew slowly. Pigs can also eat snakes and have high resistance to snake venom. Therefore, some people in the United States put pigs in farmland, and the number of poisonous snakes in the field decreased significantly.
Archaeologists found that as early as nearly ten thousand years ago, human beings began to domesticate pigs. The wild boar is covered with bristles, with blue teeth and fangs, and its character is very fierce. It runs very fast, and it's really reckless to get angry. Even the tiger, the king of beasts, is afraid of it. Domesticated domestic pigs, instead of ferocious wild boar, have changed in appearance and character, and gradually formed the characteristics of rapid development and strong reproduction, thus becoming the livestock with the highest economic value. A pig can have many uses and benefit mankind. Pigs are not only edible, but also raw materials for tanning and pharmacy. Even manure is an excellent agricultural fertilizer, which is known as "a treasure all over".
People say, "Guilin's landscape is the best in the world." But I think the scenery of the Yangtze River is also good. My family lives near the Yangtze River. I grew up drinking the Yangtze River water, so I know the Yangtze River very well.
The Yangtze River can be long, with no head in the east and no tail in the west, like a long dragon crawling on the land of the motherland. The scenery of the Yangtze River is very beautiful. The turbulent river flows from west to east day and night. Ships, large and small, only whistle on the river. The green trees and red flowers on both sides of the strait, or the green hills and white clouds, really make people feel beautiful. If it's in Jiangyin section of the Yangtze River in my hometown, you'll see high-rise buildings rising from the ground, factories dotted with high-grade highways criss-crossing, and a scene of prosperity.
The Yangtze River is rich in products. There is also the most famous Three Seasons of the Yangtze River. They are saury, shad and puffer fish. "Sanxian" is fresh and delicious, and everyone loves it. There are many fish and shrimp in the Yangtze River, and it is said that there are millions of species of light. Early in the morning, as soon as the sun rose from the horizon, the fishermen set sail in their fishing boats. In the evening, the setting sun shines on the river, "half the river is rustling and half the river is red." Everything is so beautiful. The fishermen came back whistling, and it was obvious that they were full of food. You see, baskets of fresh fish were carried to the dock and soon became a "fish mountain".
With the deepening of reform and opening up, there are more and more factories on both sides of the Yangtze River, because there are abundant water resources here, which are really inexhaustible. And backed by the Yangtze River, the transportation is convenient. The Yangtze River has also contributed a lot to the economic development of my hometown.
The Yangtze River sometimes loses its temper. It has a bad temper, it will burst its banks, flood farmland and wash down houses, but this is its punishment for human beings to destroy nature at will.
Yangtze River You are our mother river, I love you!
The tortoise is a fascinating animal, which is very pleasing. It has short limbs and clumsy movements. A pair of sparkling eyes are embedded in the delicate little head. There is a hard shell with neatly arranged squares on it. The short tail is always stretched straight, which is especially fun.
Turtles like to immerse themselves in water, especially when the sun shines on them. They will stretch out their limbs and lie lazily, very lazy.
When the little turtle eats, it is fun! If you put shrimp in water, it will stick its head out to smell it first. If it likes it, it will open its mouth and eat one after another. If it doesn't like it, it will smell it and hide.
Little turtles also like picky eaters. Once, his mother fed him fresh minced fish, which was delicious. But when he was fed dried seaweed the next day, he stopped eating. Do you think he is a picky eater?
The little turtle is still a coward and doesn't like being looked at. If you stand near it, it will shrink its head into the shell very warily, and when you leave, it will stick its head out and crawl freely.
I like the clumsy appearance of small turtles, and I also like other small animals, because they are all friends of human beings, so we should cherish them.
I'm a pain in the ass, but sometimes people like me. Now even I hate myself, and I hate those who made me. I feel inferior now. I don't have any friends. My friends are all harmful things. I feel very helpless. What should I do?
I have appeared in this world since I was very young. In the Qing Dynasty, because Britain felt that its goods were not easy to sell in China, things from the Qing Dynasty were very popular in Britain, and a large amount of silver flowed into China, which made them unwilling, so I was "born". "* * *" is my earliest image.
Britain transported a lot of * * * to China, which made China's silver return to Britain, and China people bought a lot of * * *, which greatly reduced China's combat effectiveness and seriously endangered the health of China people. Finally, a hero came forward, and he was Lin Zexu. He is our national hero. He destroyed a lot of * * * and made the people of China aware of the seriousness of the problem. But it didn't last long. The British used this as an excuse to launch a war like ours-the * * * war. It was China that began to become a semi-colonial and semi-feudal society. I also feel guilty about it, and I hate the British more.
Now I am not * * *, but a cigarette in the mouth of most people. With the development of modern society, more and more people like me, but I am not happy, because I don't want people to be destroyed because of my own body.
According to the survey, many people wait for lung cancer because of my existence, which eventually leads to death. How sad I am to hear this news, friends, please listen to a good advice, stay away from me, don't touch me again, I am not good to you.
It is reported that smoking a cigarette can reduce life expectancy by 5 seconds. Although 5 seconds sounds so insignificant, please calculate that if you smoke a pack of cigarettes a day, you will lose 100 seconds, and a month will lose 3000 seconds, which is equal to 50 minutes. If it is a year and there are twelve months in a year, that is 600 minutes, which is equal to 10 hour. God, 10 hour is really scary, so please keep people who like to deal with me away from me and don't deal with me. This is me. Although I hope to have friends, I don't want to be involved in other people's cigarettes.
Model essay 10 is the most common one in the north. Walking in the street, you can see the flower wall composed of Chinese roses. In the greening of the community, among the flowers in the park and in the flowerpots on the balcony, there are Chinese roses. Every moment is dotted with people's lives.
The flowering period of Chinese rose is very long. It blooms every month except in cold winter, so it is called Chinese rose. Spring blooms early, autumn flowers wither, and Chinese rose flowers are still bright and charming. Chinese rose flowers are the most prosperous in April and May, with seven or eight flowers crowded on a cluster of cotyledons, and the flowers are competing to open and compete for beauty. Blooming flowers cling to each other and tightly wrap the stamens, as if afraid that the delicate stamens will be blown away by the wind. Buds in bud are swaying in the breeze, as if cheering each other up.
The vitality of Chinese rose is extremely tenacious. As long as the broken branches of Chinese rose are inserted into the soil, it will grow roots again, sprout, and then bloom bright and dazzling flowers. Su Dongpo, a great poet in the Song Dynasty, praised the Chinese rose in this way. "Flowers bloom and fall without interruption, and spring goes to spring and comes to nothing. Peony is the most expensive in the Spring Festival Evening, but it is only popular in early summer. It's just that this flower is inexhaustible, accounting for four seasons a year. " Although the Chinese rose is not as expensive and warm as the peony, it has the tenacity of always opening.
Although the Chinese rose is not expensive, it is dotted with every corner of our lives, and it has tenacious vitality. It is not feminine or artificial, and it is silently dedicated to this one that belongs to itself. There are also many people like Chinese rose in life, who work silently and selflessly in their posts. The sanitation workers on the street, the traffic police at the crossroads and the tireless teachers on the platform are all very inconspicuous, but they are very important parts. They can always bloom the most charming flowers inadvertently. Although ordinary, they are enough to make every passer-by feel subtle beauty and fragrance!
I want to introduce a sweeping robot. Sweeping robots are very useful. It can clean the house, so you don't have to be so tired.
Most sweeping robots are round. They are flat, maybe half the height of your pen. They can get under your sofa. Its diameter is about 40 centimeters long. There is a touch sensor in front and a universal wheel at the bottom; There is a charging magnetic sheet on the left and right sides of the bottom plate of the sweeping robot, a rotating horizontal brush on the left and right rear, and a roller on the back of the horizontal brush. A vacuum cleaner is installed in the middle of the bottom plate, which is also the core component of the sweeping robot and sucks away the garbage and dust swept by the cross brush. The bottom plate is generally equipped with germicidal lamps to kill all kinds of bacteria.
When you press the start switch of the sweeping robot, the sweeping robot starts its program. When it is running, it usually moves forward first, rotates the cross brush while moving forward, automatically turns on the vacuum cleaner and starts its cleaning work; When it hits a wall or other obstacle, it will change direction and move to continue the next procedure.
Nowadays, sweeping robots have gradually entered thousands of households to serve us. Some people even regard the sweeping robot as a shovel for pets, which is an eye-opener for us.
Little friends, do you have a sweeping robot at home? What do you think it can do?
Onion is a very humble plant. It is so common and ordinary, but its function is great, and people like it very much.
This common plant can grow anywhere, just like a weed. In order to facilitate picking, people always plant it on the wall, in the corner of the garden, in the old foam box ... As long as there is soil, it can flourish.
The lower part of onion plant is milky white, but the upper part is blue-green. Its unique shape is always incompatible with other plants. Its leaves are closed tubes of different lengths, but they are all magical and have the function of regeneration. Every time I pinch off its upper body, a few days later, the broken part actually grows new green seedlings, which is even more magical than magic.
The roots of onions are milky white, thin and long, and deeply rooted in the soil. If uprooted, the soil will also be uprooted, like an onion follower, which can't be separated for a moment.
Although onions are unremarkable, they are found in all kinds of foods. Onion, egg and scallion cake smell very fragrant. Sprinkle a handful of chopped green onion on the ribs soup; Braised fish are decorated with onions ... As far as I know, onions are added to these foods because they can refresh and make the food more delicious and beautiful.
This is onion, an ordinary plant, which can help people create delicious food, although it is unremarkable and unsightly. They are endless, emitting fragrance with their own bodies and serving our beautiful life. I read the truth of being a man from onions. We can't be decent people who are useless to others.
Who is the smallest mammal in the world? It's the Etruscan shrew.
Etruscan shrews are very small and light. It is only about 4-6 cm long, and its tail is 4-5 cm, which is almost as big as two knuckles of an adult. Etruscan shrews generally weigh 1 to 5 grams, which is lighter than a Lego villain.
At present, the smallest Truglia shrew found in the world is only 5cm in length, 2.5cm in tail length and only 1 g in weight.
The main food of Etruscan shrews is earthworms and insects. Because it's too small! So when it preys on earthworms, it is like a mouse hitting a snake. How do Etruscan shrews prey? It will bite its prey first, then spray venom with its fangs, and then drag it into its burrow after it loses consciousness.
The shrew eats a lot, eating two to three times its own weight every day. Eat whatever you see. If you put the mouse and the shrew in the same cage, after a long time, you will find that the shrew is staring at the shredded body of the mouse, so the shrew is also called "the man with a big belly".
Although a shrew looks like a mouse, if you think a shrew is like a mouse, you are all wet. Science has proved that shrews are not related to mice. Even the relationship between man and shrew is closer than that between shrew and mouse. From the appearance, the mouth of the shrew is sharper than that of the mouse; From the food point of view, shrews eat pests and mice eat crops; From the perspective of combat effectiveness, shrews are fierce predators with strong combat effectiveness, and their combat effectiveness is relatively weak compared with rats.
The life span of shrews is only 14 to 15 months, and the gestation period is about 24 to 25 days. Every year, shrews have 1 to 2 babies, and each baby has 4 to 8 babies.
Today, let's guess a riddle and hit a fruit: "Wear green clothes, your stomach is watery, and there are many seeds, all of which are black." You must have guessed the answer. That's right! It is the best and my favorite big watermelon.
Watermelon is round, just like a football. It is covered with green and dark green stripes, one deep and one shallow, very beautiful. It's a bit like an uncle's camouflage uniform in the People's Liberation Army, hidden between melons and seedlings. The vines of watermelon are short and curly, just like the tail of a pig, which makes people feel strange. Every hot summer, the stalls in the vegetable market are filled with watermelons, which are big and round and make people drool.
Watermelon belongs to Cucurbitaceae and is an annual vine herb. Watermelon pulp is crisp, sweet and juicy, rich in minerals and vitamins. Can be used as medicine, such as melon juice and peel, which can clear away heat and relieve summer heat and induce diuresis; Eating directly can moisten the throat and quench thirst, eliminate toxins in the body and so on; It is said that eating can also cool down when you have a fever.
There are many kinds of watermelons. There are oval black beauties, chubby unicorn melons, smaller gift melons, and big and delicious local watermelons. I like unicorn melons best.
When you cut a unicorn melon, you can see the bright red flesh inlaid with spots, just like a group of little black boys walking in a fire. Pick up a piece of watermelon and gently bite it. Suddenly, the juice in your mouth overflows, and the sweet and refreshing taste is memorable. If you put it in cold water, it will be cooler and sweeter.
After listening to my introduction, you can't wait to eat watermelon.
Hello, everyone, I am a huge whale. The biggest animal in the world is our whale. In our family, the largest whale is160,000 kg, and the smallest whale is more than 2,000 kg!
We live in the ocean, and many people call us whales because we look like fish. In fact, we are not fish, but mammals.
We have many kinds, such as blue whales, white whales, killer whales and so on. But in general, it can be divided into two categories: one is baleen whales, which have no teeth; One is the toothed whale, which has sharp teeth.
I forgot to tell you, I'm a blue whale. My name is Doudou. My figure is about 30 meters and my weight is about 70 tons. If I open my mouth, I can open it wide enough for ten adults to come in and out freely. Because we stay in the water for a long time, every time we go out for air, our nostrils will spray a water column as high as 15 meters, which is equivalent to the height of your five floors. Seen from a distance, it looks like a fountain. I have great strength, which is roughly equivalent to the pulling force of a medium-sized locomotive. How's it going? Awesome!
We whales are all treasures, my fat can be used to make soap, whale meat is nutritious, whale bones can be used to extract glue, whale liver contains a lot of vitamins, and blood and internal organs are high-quality fertilizers. So, we are hunted by human beings, alas! It makes us uneasy. 1 For this reason, we protested many times, but you humans always ignored it, and we lost many relatives. Why? Why? Can't you have a kind heart like Guanyin?
Now, our number has fallen sharply and is almost extinct. Humans! Please don't kill us again.