How to choose R, how to choose a clams

The main point of the selection of clams.

1.Texture.

Among the clams, there are more people who favor jadeized clams, but don't think that as long as it is jade, it will be fine. In fact, jade is also divided into ordinary jade, water permeable, ice permeable, etc. Among them, the quality of ice penetration is the best, which has the transparency of ice cubes and the moistness of mutton fat jade.

Its permeability is not as good as water permeability, and it is more moisturizing than water permeability! Durable, with natural lines are not obvious!

2.Whether there is a crack in the worm.

Cracks are very common on clams, and because of this, perfect clams are so precious. When choosing, we must pay attention to this, especially cracks will easily cause the clams to break, so we should carefully observe whether there are defects inside the clams, and do not cause damage to the clams because of cracks.

3.Whether the color is rare and beautiful.

4.Whether the workmanship is excellent.

The excellent workmanship of the clams is relatively fine at a glance, and the surface of the clams has generally been properly polished, which undoubtedly makes the feel of the surface of the clams more oily and uniform. In addition, there are people who carve the clams, and if the craftsmanship is good, it can also add a lot of points to the clams.

Teach you how to buy apples.

Crabs are divided into sea crabs and river crabs. Depending on the gender and season, the selection method of crabs varies slightly.

Sea crab: The scientific name is three-wart pike crab, also known as B crab, sea worm, cockle, produced in the Bohai Sea and coastal areas. This crab is the fattest in March and April, and this is the best season to buy sea crabs.

Crabs also have more female crab roe and less male crab roe, so people like to buy female crabs. The identification of male and female crabs is that the abdomen of male crabs is triangular, and the abdomen of female crabs is round and has hard hairs, which are used to attach eggs. The back of the male crab's head cuirass is blue-green, and the female crab's head and chest are dark purple on the back.

The dorsal shell of sea crab is blue-brown or slightly purple. The texture is clear and shiny. There are no gastric marks on the umbilicus.

The inside of the crab foot is white and complete; There was no damage to the tips of the shells at both ends of the crab shell. When lifted, there is a feeling of weight, and the fingers press the sides of the breastplate to feel the flesh of the shell is solid. When lifting the crab body, the forefoot is not loose and sagging, the leg joint is elastic, and the forefoot and the shell are loosely connected and easy to fall off as a secondary crab.

River crab: also known as Chinese mitten crab, river worm, crab, river crab, lake crab, etc. Among them, the Qingshui hairy crabs in Zhaobeikou, Shengfang Town, Tianjin City, and Yangcheng Lake in Jiangsu Province are the most famous.

The best time to buy river crabs is around the beginning of autumn. The male crab is the pointed umbilicus, and the female crab is the mass umbilicus. The method of buying river crabs is similar to that of sea crabs, with fast crawling, large crab claw clamping force, smooth hair, complete legs, large and full individuals, crab shells, blue-green, shiny, and constantly foaming in the mouth.

When buying river crabs, you should also pay attention to the fact that dead river crabs cannot be purchased and eaten.

River crabs can't be eaten when they're dead, but sea crabs are okay.

Crabs, the appearance is not good-looking, walking rampage, but the taste is extremely delicious, especially the hairy crabs produced in Yangcheng Lake in Jiangsu, in the late autumn season of the body fat paste yellow, famous in the world.

Fresh crab, very tasty. However, if the crab is caught, the umami will be gone, and people can be poisoned after eating. So, what is the reason?

Crabs live in the water and like to eat dead fish, dead shrimp and other decaying animal carcasses in the water, and the crab will be infected with certain bacteria in the body. In particular, river crabs mostly grow in dirty river ponds, and there are a large number of germs inside and outside the crabs. Live crabs can excrete bacteria from their bodies through metabolism in their bodies; Once the crab dies, the bacteria in his body will multiply in large numbers, decompose the crab meat, and some bacteria also produce toxins, if people eat such crabs, it will cause food poisoning, common manifestations are nausea, vomiting, abdominal pain, diarrhea; In severe cases, dehydration, electrolyte imbalances, convulsions, and even shock, coma, sepsis, etc. may occur.

If the above situation occurs, the patient should be immediately sent to the hospital, given dextrose normal saline or compound sodium chloride intravenous drip, supplemented with fluids, and encouraged to drink more water and tea. Potassium supplementation should be given in time to maintain electrolyte balance, and sensitive antibiotics should be given to control and prevent infection. Patients with low blood pressure are given vasopressor drugs and other symptomatic treatment.

Therefore, when buying crabs, you must pay attention to whether they are fresh, do not buy dead crabs, especially river crabs, and cook them thoroughly when using them to kill the bacteria contaminated inside and outside the crabs.

18 3 3 How to calculate the division first, then multiplication.

1, the third quarter of the fifth 2, b 3, c 4, a 5, d 6, c 7, a