1. Olympic track and field competition

Since the first Olympic Games in 1896, track and field movements are one of the main competitions.Since the 9th Olympic Games in 1928, the women's track and field project has been added.The track and field is the most gold medal in the Olympic Games.In the 2012 London Olympic Games track and field project, 48 gold medals were set up.

The International Fields stipulates that athletes must meet the specified registration standards at the prescribed time. Each individual project reaches the A -level standard for up to 3 athletes. If athletes who do not meet the A -level standards, one allows one to meet the B -level standardThe athletes participating in the athletes, if they do not meet the B -level standard athletes, they are allowed to report to each male and female athletes to participate in other project competitions other than the field project, 10,000 meters, seven all -around, and ten all -around items.Each association of the relay project has a maximum of 1 team, and the relay athletes can report 6, of which two unspoken athletes can be reported.

Second, World Track and Field Championship

The World Track and Field Championships is an international track and field competition hosted by the International Athletics Federation. It was founded in 1983. It was originally a session every four years. It was changed to one session every two years since 1991.

Development process

In 1913, the International Amateur Track and Field Federation, which was just established, decided that the track and field competition in the Olympic Games actually assumed the mission of the track and field World Championships. Therefore, the world's top track and field athletes can only be "carnival" every four years.This decision has been effective for more than 50 years. Until the end of the 1960s, the field associations of many countries began to call for special track and field World Championships.

In 1976, at the International Field Conference held in Puerto Rico, it was finally determined that it was necessary to hold a track and field World Championships outside the Olympic Games.The first time was 1983, and there were two candidates: Stugart in West Germany and Herbinye in Finland.In the end, the latter was determined and decided to hold this competition at the Herbinky Olympic stadium. This venue was the main venue of the 1952 Olympic Games.

The men in the 1976 Olympic Games were taken out of 50 kilometers and became the only project of the "World Championships" that year. This is just the predecessor of the Track and Field World Championships.In 1980, there was still a so -called "World Championship", including only two women's projects: 400 meters and 3000 meters.

Finally, in 1983, the real track and field World Championships were boiled.In the first session, more than 1,300 players from 154 teams participated.Gradually, the scale is getting bigger and bigger.At the beginning, the four years, after the third session of 1991, changed to two years.

In addition to the increasing number of participants, the project is becoming more and more complete-

In 1987, women's 10,000 meters and 10 kilometers were added;

In 1993, the women's three -level jump was added;

In 1995, the woman 5000 meters replaced 3000 meters;

In 1999, the women's pole jumping and chain balls were added.

In 2005, the women's 3000 -meter obstacles were added.

3. World indoor track and field championship

The International Track and Federation of the International Track and Field Federation is a international interior track and field competition organized by the International Athletics Federation. The first time was held in Paris, France in the first time.World indoor track and field championship.

The World indoor track and field championships are held every two years. Except for two consecutive events in 2003 and 2004, the reason is that the International Athletics Federation will be held one year in advance, and the World Track and Field Championships can be held every year.

On the evening of November 26, 2017, the 212th Council of the International Field Union was held in Monaco. The International Field Federation Chairman Sebastianke announced that Nanjing, China won the right to host the 2020 World Track and Field Championship.This is the first time in China to host the World Indoor Track and Field Championships. It is also a major international track and field competition in China after the 2015 Beijing World Track and Field Championships.

Competition

There are 26 competitions in the World indoor track and field championships, including 13 men and 13 women.Separate

Men: 60 meters, 400 meters, 800 meters, 1500 meters, 3000 meters, 60 meters jump columns, 4 x 400 meters relay, high jump, high pole jump, long jump, three -level long jump and shotgun, seven all -round.

women: 60 meters, 400 meters, 800 meters, 1500 meters, 3000 meters, 60 meters jump columns, 4 x 400 meters relay, high jump, high pole jump, remote jump, three -level long jump and shotgun, five all -round.

Fourth, World Cup track and field race

The World Cup track and field World Cup track and field competition is a high -level track and field event hosted by the IAAF.

Introduction to the event

Before the 1970s, only the World Field Federation and the International Olympic Committee co -organized the Olympic track and field competition.After entering the 1970s, the International Field Federation has been enlightened in the European Cup track and field competition, which has begun in the mid -1960s, and wants to imitate the European Cup.Development.After years of brewing, the plan for the group office in 1975 has basically formed.Subsequently, the International Field Federation consulted relevant opinions from various countries and regional track and field organizations, and the International Field Conference officially passed the resolution during the 21st Olympic Games in July 1976.It is decided to host the World Cup track and field, every two years, and one year before or after the Olympics.The 1985s Cup was changed from two years to four years, and the match period was fixed in one year after the Olympic Games.

The World Cup track and field competition is only held in the final. There are 8 teams participating in: the United States team; one team of the European Cup championship runner -up; one team of each continents each continent is selected by the place where they are located.However, when the 3rd Cup in 1981 was held in Rome, the host Italy sent a separate team to attend and became 9 teams.In 1989 and 2002, the host also sent a team to participate in the competition.

Each project of each project is limited to one or one team (relay project).The total score of the first eight groups is: the first place in the single or relay is 8 points, the second place is 7 points.

There are relatively few projects set up in the World Cup.From the four sessions from 1977 to 1985, men were fixed to 20, without competition, marathon and ten versatile; women's projects changed slightly, 14 items in 1977; increased by 400 meters in 1979;It was 100,000 meters and developed to 16 items. Like men, there are no marathon and all -around projects.The World Cup was the first to include women's 400 -meter column and 3000 meters into the world competition.

5. International Field Diamond League

The FIFA Diamond League, referred to as the Diamond League, is a global track and field series launched by the FIFA in 2010.The event replaced the International Field Gold League, which was originally limited in Europe, and changed from gold bars to diamonds at the end of the quarter.There are 14 stations in the competition, including Shanghai Station, China.The Diamond League set up 32 single items with a prize of 416,000 US dollars.

Competition

According to the rules of the International Field Diamond League, 32 single items will be established, including men and women 100 meters, 200 meters, 400 meters, 800 meters, 1500 meters, 5000 meters, 400 meters, 3000 meters obstacles, high jumps, long jumps, three Levels, and level three Levels.Jumping, jumping, shot, javelin, iron cake, men's 110 -meter column, women's 100 -meter column.Shanghai Station will choose 16 of them, and 8 projects for men and women to compete.The annual projects will be held in rotation.

The special equity enjoyed by Shanghai alone: Among the 16 projects, Shanghai Station permanently retains the men's 110 -meter column.

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Iopia eyes can be wornPolarized sunshine?

Who can understand the pain of myopia?Many friends dare not try polarizing Sunglasses because of myopia.In fact, myopia can wear polarized Sunglasses. Let's take a look at what good methods.

1. Polarized Sunglasses with a degree

A degree of polarizer is suitable for friends with myopia. This is a lens that combines polarized lenses and myopia lenses. It can effectively solve the confusion of myopia friends who cannot wear polarized Sunglasses!

2, glasses clip

You can also buy a pair of Polarized mirror clips suitable for Myopia glasses that are usually worn. This has the same Shading effect as the normal polarizing mirror, and the effect of blocking ultraviolet rays is also very good.

3. Set mirror

Everyone can also buy a large polarized Sunglasses on myopia mirror. Although it is very convenient, it will make your nose bridge to bear the light weight!

Is myopia polarizing mirror harm the eyes?

Under the condition of precision mirror, it will not be harmful to the eyes. Ordinary polarizing mirrors cannot correct myopia. You can customize a pair of polarized mirrors with myopia.However, people with myopia wearing myopia mirror may have a lot of inconvenience, especially the degree of polarizer with a degree of polarizer. It needs to change glasses when using it indoors. It is very troublesome. Thereforemirror.

What are the types of myopia polarizers?

1. Upper flip type

It is convenient to quickly roll up when the light environment is often or rapid, and the safety and convenience are improved to the greatest extent.The Sunglasses can also be removed and used as Myopia glasses alone.

2. Replacement

The innovation of this method is relatively low, but the toughness of the materials is better and the mold is accurate.Friends who do nt travel frequently and have a lower degree can consider. You can bring close -up videos in the room when you go to work. You can switch to Sunglasses when you travel!

3. Uncinction mirror frame

It can be easily disassembled. Because the frame materials are not easy to change, it is very stable.It is currently the best solution to myopia.

When do I need to wear polarized Sunglasses

If you don't drive, you rarely participate in outdoor sports, but if you walk shopping and walk, a Putong Sunglasses can already meet your needs.So when should I wear polarized Sunglasses?

The polarized angle and arc of polarizing Sunglasses are professional design and processing. The wearer will not have the feeling of distortion and dizziness of the scene. It is most suitable for fishing, driving, sports, navigation, skiing, hunting and other occasions.For example, fishermen like to wear polarized Sunglasses, because wearing it fishing, it is easier to see Fish drift and not tired of the eyes.At the same time, polarizing lenses are the most recognized lenses in the world.Polarized tablets make the polarization principle of light, which can effectively eliminate the special functions of glare, filter the disorderly light, make the driver improve the vision, and the driving is easier.Even friends who love Outdoor tourism are unique to polarizing Sunglasses, because it can enhance color contrasts, reduce reflection, enhance the color saturation of the scenery, and let you see a clearer world.

Wearmyopia polarizerWhat to pay attention to

1. Everyone usually controls the time of polarizing Sunglasses and should not be worn for a long time.

2. Do not wear polarized Sunglasses for a long time outdoors, and remove it indoors.

3. Do not choose polarized Sunglasses with too large frame frames and excessive quality. This Sunglasses can make people swell on their faces and distracted their attention.

4. Friends who drive when they encounter a large temperature difference inside and outside the car. When the windows and glasses are fog, they should stop the car safely, and then dry the polarized Sunglasses carefully.

5. Everyone is best to choose dark gray or brown polarized Sunglasses, because they have the smallest color distortion and the best color.

6. When wearing polarized Sunglasses, avoid contact with chemicals such as perfume, pesticides, etc., so as not to cause damage to the lens.

7. Wear polarized Sunglasses during driving. Do not put polarmic Sunglasses on the car console to avoid deformation due to high temperature.

Xiaobian concluded: Polarized Sunglasses are a kind of Sunglasses, so they naturally inherit the basic attributes of Sunglasses -Shading.In addition to this, due to its polarizing characteristics, the Polarized mirror can also adjust the Solar light to the eyes and shoot into the eyes, like a louver window, soft and not dazzling.This can effectively KO's various reflex Lights produced in our daily life, only absorb the reflection light of the object itself, and truly present the things to see.Therefore, it can improve human vision, reduce eye fatigue, make the field of vision more clear, and play a role in nourishing eye and eye protection.Not only that, polarizing Sunglasses can also block the hidden killer -ultraviolet rays, which allows people to avoid ultraviolet infringement.

Disclaimer: The above method stems from the index of the program system or the sharing of netizens. It is for your reference only and does not represent the research perspective of this website. It proves that it is valid. Please pay attention to the authenticity and authority of the source of the content of the content.Apply to delete & gt; & gt; error correction & gt; & gt;

1. The difference between the fishing carrier 3 axis and 12 axis

1. The number of bearing is different

3 The number of bearing in the internal rotation part of the fish line wheels equipped with a shaft sea pole is 3;12 The internal rotation parts of the fish line wheels equipped with a shaft sea pole are 12 bearing.

2. Different friction

The more bearings, the less friction, the smoother rotation, the faster the closing line, the easier.In theory, 12 axes are less friction than 3 axes, and the lines close faster.

3. Different prices

The price of the 3 axis of the fishing Ship is relatively low, and the price of the 12 axis of the fishing Ship is higher.

4. Different weight

The fish line wheel of the 3 axis is small, the structure is simple, and the weight is light; the 12 -axis fishing Ship is heavier than the 3 -axis fishing Ship.

2. How many axes do the fishing Ship buy?

The fishing wheel axis means rolling axis. In other words, the two circles are together, and then some steel balls are placed in the middle, which can mainly play the effect of sliding friction and lubrication, which will make the fishing wheels use smoother.But this is not to say that the more bearings of the fishing wheels, the better. The gear combination of the fishing wheel only requires 5-8 bearings. Generally, the number of axis should not be less than 5.The number of fishing ships will also increase the weight of the fishing Ship.Therefore, the axis is not the only reference parameter when choosing a fishing Ship.

1. Is there a back of Maza?

Maza is a popular Outdoor product, especially in Camping, Picnic and other activities. Because of its lightness and ease, people can easily bring it into the Outdoor environment and use it when needed.Woolen cloth?

Traditional Maza generally does not have back. Its main feature is folding storage, which is easy to carry, but now there are many Maza designs of back -to -back models, which is more comfortable than ordinary Maza.

Second, which is a good back of Maza and ordinary Maza

Ordinary Maza generally does not have back. Compared with Maza with back, the two have their own advantages:

1. Ordinary Maza

(1) Small volume and easy to carry: ordinary Maza has no back, and the design is even light, which is convenient to carry during outdoor activities, such as Camping, Picnic, mountaineering, etc.

(2) Simple structure and easy storage: The folding design of ordinary Maza makes it easy to store when not in use without taking up too much space.

2. Back Maza

(1) High comfort: Back design can provide support for the back, improve the comfort when sitting, and reduce the back pressure.

(2) Various functions: In addition to suitable for rest and dining, the back of Maza is also suitable for watching performances and sports events for a long time.

(3) Good stability: As the back part is increased, the back of the back is more stable when used, and it is not easy to dump.

However, it should be noted that because the back part is increased, the back of the back is large and the weight increases accordingly. It may not be friendly for users who need long -term Hiking or Backpack travel; if your main needs are outdoor activities Outdoor activitiesIt is easy to carry, light and easy to store, then ordinary Maza may be more suitable for you; if you need a highly comfortable and diverse sitting gear, for watching performances, sports events, etc.Support, then the back of the back may be more suitable for you.

1. Which one is better for fishing?

1. Small medicines are different from eating and promoting food.The main purpose of temptation is to lure fish into the nest, such as pig breast milk, Luke incense, egg milk fragrance and other fragrances. The main role is to lure fish into the nest.The main purpose of conshaying small medicines is to promote fish to eat, such as shrimp powder, shrimp oil, red worm powder, composite sea creatures.When bait bait, two kinds of small medicines can be used together.

2. Different small medicines used in fishing objects are also different.If you fishing carp, you can use corn flavor, strawberry fragrance, Sweet potato cream, etc.; fish fishing can be used for egg milk flavor, black chicken cream, mouse medicine, Luke fragrance, etc.Different target fish generally use different small medicines.

3. There are also differences in small medicines used in different seasons.Small medicines made in summer are better.If acid, strawberry fragrance, pineapple fragrance, etc.; Small medicines for water organisms in winter are better.Such as shrimp powder, red worm powder, black chicken cream, etc.

In summary, there are no best fishing medicines, and each variety has its appropriate time and environment.Just use it right, sometimes it will be reaction.

2. precautions for using fishing medicines

1. Small medicines serve fishing, and they cannot be completely centered on small medicine.Many fishing novices naturally think that you can catch fish after buying a good fishing medicine, and put all your energy on studying small medicines. In fact, this is a completely wrong behavior.A good medicine requires solid fishing skills as a basic guarantee. Those who have not practiced fishing skills are not good.

2. The reason can be attributed to small medicine without fishing. This is a very wrong understanding.Different fish feelings and water feelings have different fishing methods. Different small medicines should be randomly respond to the amount of drugs. The rigidity and persistence of a use of usage and dosage must not be used.fishing is a game of wise men. Those who have the rules will stay at a level for a lifetime, and the fishing skills have not grown.

3. Small medicines that excite the fish do not allow the fish to eat, and can only suppress the fish opening.Many fishermen mistakenly believe that as long as the fish is excited, the fish will speak, so they are blindly looking for a small medicine that excites the fish.After the fish is excited, it will only become anxious, scratching everywhere, and the desire to eat is suppressed.The truly effective food promotion agent is the hungry hormone such as Daba salt, so that the fish can make the fish hungry, and then eat bait.

4. The essence of polyfish is that the smell spreads in the water, so that the fish tracking odor comes to the den.Therefore, the scientific use of odor communication agents is the key to polyfish.The smell of flavor small medicine needs to be transmitted in the water with the help of the smell to spread the carrier to complete the fast polyfish.

5. The essence of retaining fish is to make the fish not anxious, stable and comfortable. The restless fish will only scattered everywhere. Only when the fish feels comfortable in the nest, will the fish leave the fish in the nest.It has the function of allowing fish to calm down, relieve pain in fish, supply oxygen to the stress to eliminate fish, such as Beijing fish Settlement Small medicine.

6. Small medicines are different from different fish. For example, carp likes fragrance and sweetness, catfish like strong fragrance and fishy, Luo Fei likes thick fish and fragrance.But the taste of this fish changes with weak weather and seasons.When it is cool, it is more fishy, and it is more vegetarian when it is hot.

In the end, the change is inseparable, and the small medicine has an important role in fishing, but it is not a decisive role. Fishermen should still learn fishing from fishing, constantly accumulate and summarize experience, be down -to -earth, and practice fishing skills step by step.No one can succeed casually.