Little is known about the interest in hairy crabs.

1. What tips should I pay attention to when eating hairy crabs?

Brother Su Xie told you that after eating crabs and breaking their shells, there was a white thing besides yellow mud. Some people think it is a parasite!

In fact, the white thing in the hairy crab is its fat, but if the hairy crab is not cooked, there may still be parasites.

Hairy crabs are cold, so it is best to drink a cup of hot ginger tea to relieve the cold after eating. In addition to this small detail, there are many taboos for eating hairy crabs. First of all, we must pay attention to hygiene and avoid eating half-cooked hairy crabs. Someone once ate undercooked hairy crabs, which caused paragonimiasis to invade the body, causing intestinal rot and lung rot, and the consequences were very serious. Therefore, it is best to cook crabs thoroughly before eating, at least for 20 minutes.

Although hairy crabs are delicious, not every part can be eaten. There is a hexagonal white thing between its gills, which is actually the stomach of a hairy crab. It is extremely cold and cold, and it is not suitable for people with deficiency and cold. In addition, don't eat the viscera of hairy crabs, because there are heavy metals accumulated in the viscera, which will be poisoned if you eat too much.

There are two things to remember, persimmons and beer can't be eaten with hairy crabs. The meat of hairy crabs is rich in protein, and persimmons contain tannin. Eating hairy crabs and persimmons together will solidify protein and lead to intestinal spasm. There is a very scary saying in Shanghai that "Persimmons and crabs will die if eaten together", so we must pay attention to it. Beer is "ghost herbal tea" and it is cold. If you send crabs with beer, the coldness will increase and it will easily cause diarrhea. Therefore, it is best to send crabs with yellow wine or white wine with isothermal properties.

It should be noted that not everyone can eat hairy crabs. Pregnant women are forbidden to eat. For the sake of children, it is best to endure this year and try again next year. People who are weak and afraid of the cold should not eat it. Symptoms such as rubella, stomach cramp, diarrhea and abdominal pain will appear after eating. People with sensitive skin should not eat hairy crabs, otherwise there will be symptoms such as redness, itching, rash, vomiting, stomach cramps, diarrhea and abdominal pain. People with high cholesterol should not eat it. Although the fat content of hairy crabs is lower than that of chicken, they contain extremely high cholesterol. Every100g hairy crabs contain cholesterol135mg. Even healthy people should not eat it many times. Eat 1/2 to 1.

2. Pay attention to some common sense when eating hairy crabs.

Autumn is crisp, sweet-scented osmanthus is fragrant, and the best golden season of the year is coming. Autumn is also the best season for people's health. Makes people feel comfortable and happy. After the long summer heat, people have an "impulse" to move after being lazy for several months, and people have arranged their travel plans one after another.

Autumn is still a very delicious season. The most coveted thing is hairy crabs. Autumn wind, crab feet yellow, the famous Yangcheng Lake hairy crabs have climbed the table of Hangzhou people. Although hairy crabs are delicious to everyone, not everyone likes the delicious hairy crabs from a health point of view. Experts remind that some people can only taste delicious hairy crabs.

People with spleen and stomach deficiency and diarrhea should eat less crabs. Crabs are cold, which aggravates cold in the body and diarrhea. Crabs have a high cholesterol content. Every100g of crab meat contains 235mg of cholesterol, and every100g of crab roe contains 460mg of cholesterol. Patients with coronary heart disease, arteriosclerosis, hypertension and hyperlipidemia should eat less crabs, especially crab roe, so as not to aggravate the development of the disease. People with biliary tract diseases such as cholecystitis and gallstones should be forbidden to eat crabs.

Crabs should fast during colds. Chinese medicine believes that people who catch a cold have a thick tongue coating and a lot of phlegm in their bodies, while crabs are food that produces phlegm and dampness. Eating a cold and fever will aggravate phlegm and dampness in the body.

In addition, crabs belong to high purine food, and gout patients should limit their intake so as not to aggravate the accumulation of uric acid in joints and gout. Patients with hepatitis, especially those with acute attack, should not eat crabs. Crab is not recommended for pregnant women, and it is suitable for eating warm food during pregnancy, such as eel.

Apples, crabs, etc. It is very cold. Eating it during pregnancy may cause miscarriage, and eating it after delivery may cause uterine contraction pain.

Even healthy people should pay attention to how to eat crabs. Don't eat dead crabs. After their death, their bodies will decompose to produce histamine, which is a toxic substance. Moreover, with the extension of death time, more and more histamine is accumulated in crabs, and the toxic gas is getting bigger and bigger. Don't eat crabs raw. Crabs may contain various viruses, bacteria and even parasites, which may invade the lungs, brain and other parts. Soaking in yellow wine and white wine alone can't kill parasites.

When eating crabs, it is best to add some ginger juice to the seasoning, or soak Jiang Mo in the seasoning for a long time. Ginger is a hot food that can dispel the coldness of crabs. When eating crabs, don't eat persimmons and drink tea at the same time. Tannic acid in persimmon and tea meets protein in crab, which will condense into indigestible lumps, causing "stomach persimmon disease", abdominal pain, vomiting and other symptoms. If you want to eat persimmon and drink tea, it is best to have two hours apart.

Article source, Yangcheng Lake hairy crabs:

Can you teach me some tips on buying crabs?

Buying crabs is very particular, specifically:

One calculation: it is advisable to eat female crabs in September of the lunar calendar, with more crab yellow; Male crabs should be eaten in October of the lunar calendar, and the paste is full of meat and fat.

The second balance: heavy and fat, light and less meat.

Third look: choose old crabs and abandon young crabs. The old crab is dark blue and shiny, with no mud on its surface, long and hard feet, thick and solid body, iron spots on its abdomen and hard feet. If the belly glows, it is a tender crab.

Four touches: touch your eyes, and the crab claws should respond quickly; If you pull your foot, you should take it back at once.

Five turns: turn the crab upside down, and the one who can turn it over quickly is a good crab.

Six releases: put the crab on the ground, and the crab that climbs fast is strong.

4. Common sense of life: the difference between swimming crab and hairy crab

The main difference is that the subjects have different classification, different morphological characteristics, different living habits and different distribution ranges, as follows:

First, the disciplines are classified differently.

1, Portuguese

Also known as sea crab, Portunus trituberculatus, gun crab and sea crab. It belongs to Decapoda, Portunus, Portunus.

2. Hairy crabs

Chinese name Eriocheir sinensis, also known as river crab, hairy crab, clear water crab, hairy crab and crab. It belongs to the species of Eriocheir sinensis, a quadruped.

Second, the morphological characteristics are different.

1, Portuguese

The head breastplate is spindle-shaped and slightly convex. There are three prominent verrucous bulges on the surface, stomach area 1 and heart area 2. Its shape is like an ellipse, and its two ends are pointed like weaving shuttles, so it has the name of Portunus trituberculatus. The abdomen of male crab is triangular, and that of female crab is round. The back of the male crab is dark green, the female crab is purple, and the abdomen is gray.

2. Hairy crabs

The breastplate is round and square, and the back half is wider than the front half. The back is raised and the forehead and liver area are depressed, which has the typical morphological characteristics of "green back, white belly, golden claws and yellow hair"

Third, different living habits.

1, Portuguese

The adaptive salinity is 13~38‰, and the optimum growth salinity is 20~35‰. The suitable salinity for overwintering is 28~35‰. Lurking at the bottom of the sea during the day and coming out for food at night, the phototaxis is obvious. It belongs to omnivorous animals and likes to eat shellfish, fresh miscellaneous fish, small miscellaneous shrimp and so on. And algae buds, dead marine animals and rotten aquatic plants.

2. Hairy crabs

The main lifestyle of Eriocheir sinensis is benthic and burrowing, generally living in gravel and aquatic plants, often digging holes in mudflats of rivers, rivers and lakes, hiding during the day and coming out at night, and feeding on animal carcasses or grains.

Fourth, the distribution range is different.

1, Portuguese

Distributed in most coastal areas of Japan, Korea, Malay Archipelago, Red Sea and Chinese mainland.

2. Hairy crabs

Eriocheir sinensis is distributed in China, from Liaoning in the north to Tonghai rivers in Fujian coastal provinces in the south, especially lakes and rivers on both sides of the middle and lower reaches of the Yangtze River.

Baidu Encyclopedia-Portuguese

Baidu encyclopedia-Chinese mitten crab

5. Interesting little knowledge

Little knowledge, physical interest-the "weight of things" that will change. After learning the relevant physical knowledge, students may know that the weight of the object itself is not static, that is, it is sometimes "weightless"; Sometimes it is "overweight".

What causes the change in the weight of an object? Don't worry, let's look at the following story first: Once upon a time, there was a story: a businessman bought 5000 tons of herring from Dutch fishermen, loaded it on a boat and transported it from a Dutch city to the seaport of Maga, an African city near the equator. When I got there, I weighed it and found that the herring was nearly 19 tons short.

Strange! Where did it go? It can't be stolen because the ship didn't call all the way. At that time, no one could reveal the secret, but now we finally know the reason: it turned out that this was a joke played by gravity.

Because the earth is slightly oval, its radius of north and south poles is 20 kilometers smaller than that of equator. The smaller the radius, the greater the attraction; or vice versa, Dallas to the auditorium

Therefore, when the Dutch 5000 tons of herring are transported near the equator, the weight of herring naturally becomes "light". In addition, the weight of the object changes a lot! If you are on a high mountain, it is lighter than on the flat ground; The equator is lighter than the poles; It is much lighter in water than on land, and so on.

As you can imagine, if you fly to a high altitude area where the gravity of the earth can't reach, there is no weight at all, because the gravity of the earth is very small. However, no matter how it changes, the quality of the object will not change! Well, now everyone knows the truth! In fact, there are many similar problems around us. As long as we can find it in time and combine it with theory, we can find the correct answer.

I believe that if you encounter similar problems in the future, don't be "helpless"! A cat has 230 bones. Cats are more sensitive to hearing than people and dogs.

Compared with its size, cats have bigger eyes than any mammal. The normal pulse of a cat is between 1 10 and 170 beats per minute.

The normal temperature of a cat is about 39 degrees. The vertical jumping height of a cat can reach five times its own height.

A cat's nose print is unique. No two cats have the same nose print. Cats react more strongly to women than men because women's voices are more frequent than men's.

The running speed of domestic cats is about 55 to 60 kilometers per hour. Cats are the most sleepy mammals, sleeping about 16 hours a day.

Birds are interesting and have little knowledge. What bird is not easily noticed? When you pass a tree with a woodcock in the forest, you may not notice that there is a woodcock in the tree. The woodcock is not a very small bird, but a big bird, but its beautiful feathers look like fallen leaves in autumn, so it is not easy to be noticed because it pretends to be motionless. The woodcock stands in the tree, always paying attention to the surrounding situation, even if there is a little movement behind him, it can immediately detect it.

This is because its eyes are located at the back of its head, so no enemy can escape its sight. Of course, few insects can escape it.

Where does grouse live? Grogrouse lives in the cold zone of the northern and southern hemispheres and is one of the few birds in the cold zone. In winter, birds perch on pine or fir trees.

In order to resist the cold climate, it must eat a lot of needles to generate energy. Near the polar regions, the days are short and the nights are long in winter, so grouse eat almost all day.

Spring has come, and grouse have started courtship. They usually choose the male bird by the female bird, and they must win the competition to win the favor of the female bird.

Do parrots chat with each other? "Baby, get up!" Some parrots can talk, but they don't really talk. Parrots' owners patiently teach them to say some simple words. Although they can read them, they don't understand the meaning at all.

Animals can communicate with each other in their own way, not in the language we understand. Their crying may mean: "I'm afraid"; "Please touch me"; "I found food" or "danger! Run! " Colors, movements and smells can also be used as communication tools between animals.

Hunters can set traps by imitating their sounds and smells, and let them trap themselves. Penguins can't build nests? In fact, penguins can't build nests.

When the mother penguin went to the sea to look for food, the father penguin stood on the land, put the egg between his feet, covered the egg with a fat belly, and hatched the egg. Penguins hatch their eggs in the same place every year. They use their beaks and wings to deal with possible enemies and protect their offspring.

Newborn penguins will look for food in their parents' mouths. Penguins feed on fish, shrimp and shells.

In the summer when food is abundant, they spend all their time supplementing nutrition, and can usually dive into the sea hundreds of meters deep to find food. Can Penguin Fly Penguin is a very strange animal, dull but cute.

Their feet are like wearing the same trouser legs, and it is very difficult to walk. Penguins always contract their wings to keep their balance.

Although they can't fly, they still belong to birds. Their heavy clothes are covered with very tight little feathers, which are all covered with oil.

Penguins flap their wings in the water as if equipped with an engine. Penguins are very lively and like diving and playing in the water very much.

When they avoid natural enemies, they often surface and can glide in the air 1 m or more. What kind of nest is the most beautiful? There are many kinds of birds flying in the sky, and each bird has a different nest.

Hummingbirds' nests are smaller than spoons, and some eagles' nests are bigger than cars. Birds use fluff, branches, saliva or cobwebs as nesting materials.

The shape of the bird's nest, some like bowls, some like balls; Some hang like cradles, others float on the water like rafts. There are hundreds of species of weaver birds in Africa, and their nests are very complicated. Some birds also paint their nests to attract the attention of females.

There are many kinds of bird's nest in the world, which one is the most beautiful! How do birds fly long distances? Birds fly in groups for days on a long journey. For example, terns fly from the North Pole to the South Pole in this way, which is about 20 thousand kilometers away.

The long flight of birds is actually very hard. Fly.

6. Ask a little fable about crabs.

Small Crab Yi Xue

Everyone says that the panda warrior is good at martial arts, but the little crab is not convinced and wants to compete with the panda warrior. Panda soldiers have no choice but to compete with small crabs. In order not to hurt the little crab, the panda warrior only succeeded in half, but did not expect to hurt the little crab's hand.

The little crab was sent to a light to recuperate, and the martial arts teacher Panda Hero comforted him and said, "Sorry, son, I hurt you by mistake. Take good care of yourself and learn martial arts from me when you get well. " . The little crab blushed and said, "Master, it seems that I can't learn martial arts. I want to learn carpentry. " After recovering, the little crab bid farewell to the panda warrior and went to learn from grandpa Woodpecker, a carpenter.

Grandpa Woodpecker saw that the two big knives in the little crab's hand looked like saws, so he put them in. Grandpa Woodpecker said to the little crab, "Son, I want to hit two boxes. Please saw these boards open. " The little crab saw and saw for a long time with a saw in his hand, but he didn't see a board.

Grandpa Woodpecker is unhappy: "What's the matter? You can't pretend to work! " "Master, it seems that * * * can't be a carpenter." He said goodbye to Grandpa Woodpecker and was preparing to go home in dismay. Grandpa Woodpecker severely criticized him and said, "How can you give up halfway?" Nothing will succeed in this way! "

The little crab blushed and decided to study this craft well. It has been studying hard and practicing hard ... Finally, one day, Grandpa Woodpecker touched the glistening beard and said kindly to the little crab, "Son, you started your career." From now on, you are an excellent carpenter. Go home! "

As soon as Grandpa Woodpecker finished speaking, the little crab jumped up happily. It said goodbye to grandpa and went home.

Source: Modern and Contemporary Sun Bowen's "Extracurricular Bookstore for Primary and Secondary School Students: 365 Nights of Knowledge Fairy Tales"

Extended data

There is no shortcut to success.

If there is any shortcut to success, the only shortcut to success is perseverance. Persistence is the simplest and most effective shortcut to success. Find a direction without consuming many brain cells. You will go straight ahead, don't look back, don't look around, believe in yourself, and you will definitely reach your destination. Li Bai was a great poet in Tang Dynasty. When he was a child, he studied hard and often skipped classes.

On one occasion, he couldn't go on in class, so he went to the suburbs to play. He came to a stream and met a white-haired woman who quickly ground the iron pestle. He stood for a long time, staring at the old woman who was ground, and he would have a strange question: "Grandma, why are you grinding this?" The old woman smiled. "Give me an injection."

"Is that the ground?" "Yes, as long as you work hard." "Oh!" The woman's confident answer strongly shocked him! So he quickly turned around and went back to school. Since then, he has finally made great achievements. This is the origin of "the iron pestle is ground into a needle", and this story has inspired us to succeed step by step for thousands of years.

7. Ask a little fable about crabs.

It's a bright moonlit night.

Small crabs are chirping on the beach.

The mother crab suddenly cried out in horror.

"alas! Kid! Why do you walk sideways? How ugly!

Will be laughed at by everyone! You must go straight! "

"I know! Mom! " However, I still don't understand.

Bubble said from his mouth:

"So, mom, will you demonstrate and demonstrate? I will do it! "

"okay! Very simple! "

The mother crab tries to walk straight, but no matter how she walks, she can only walk sideways.

Mother crab is so discouraged!

And the little crabs can only learn to be like their mothers one by one.

8. Teaching plan of small class interesting literacy crab school in kindergarten

moving target

1. Let children learn nursery rhymes.

2. Let children know the characteristics and habits of crabs.

Teaching emphases and difficulties

Through the understanding of small crabs, we know that this kind of behavior is not good. Let children learn to be polite, United and friendly, respect the good habits of others, and cultivate them into good children that everyone loves.

Activities to be prepared

Wall charts, crab toys

Activity process (it is not necessary to record all the conversations and activities between teachers and students in detail, but it is necessary to clearly reproduce the main links of the activity, that is, the beginning link, the basic link, the end link and the extension link. Note: Emphasis is placed on the basic links)

I. Introduction:

1. The teacher shows the prepared wall chart of underwater animals and asks the children to tell which animals are there. Where do they live?

Two. Preliminary comments:

1. The teacher shows the toy crab and lets the children observe how many feet it has.

2. What's the use of two big pliers on your head?

Its body has a hard shell. What does it do? There are two in its eyes.

3. Observe again:

What did the little crab do in the picture? Why are fish and shrimp afraid of it?

4. Explain nursery rhymes:

The teacher reads nursery rhymes with emotion, and then teaches the children to read nursery rhymes and explain the contents of nursery rhymes, so that the children can understand the bullying of the little crab. Rudeness will make other animals hate it and dislike it.

The expansion of verb (verb's abbreviation);

Let the children listen to the crab song and draw freely.

Teaching reflection

Tell children that it is impolite. It has two big pliers, so it is bullying, rude and disrespectful to other small animals. It scares it away when it sees fish, and knocks it down when it sees shrimp, so other small animals don't like it. For example, some children in our class are always pushing people to fight and grab things. This kind of behavior is not good, just like a little crab, rude and disunited. In this case, other children will not play with him and dare not be with him. So we should get rid of this bad habit and be a polite, United and friendly boy.