SNS virtual currency
The securities and Exchange Commission (SEC) identified XRP as a security, and hired 21 lawyers to step up preparations to fight the SEC's lawsuit against XRP
at present, the case is still in progress, and the result will be known in the next few months
The emergence of the Internet is the technical background of the future currency: in the early 21st century, a new type of proction relations and organizational form appeared in the world, which is closely related to the development of the Internet and new technology. After the emergence of a new organizational form and mode of proction to rethink the social trend of thought“ Wiki model has penetrated into all aspects of our lives, imperceptibly carrying out a great change
wikiart emphasizes that after the emergence of new network technologies, the open, peer-to-peer and shared large-scale cooperation mode will certainly change the traditional art creation methods and forms. Wiki artists pursue a shared, open and harmonious world. It advocates the use of collective wisdom, large-scale collaboration and peer-to-peer creation through the Internet network collaborative community (wikisns)
the phenomenon that wiki model was first applied to artistic creation appeared in the American music instry. However, e to the right problem, it is difficult to realize the free sharing of works, so this model has been curbed and has not been further developed. This discovery was first put forward in 2007 by the world famous new economist, Canadian "don Tapscott" and British "Anthony D. Williams" book "wikieconomics"
wikivism is a new science and art, which is based on four new principles: openness, equivalence, sharing and global operation. These new rules are replacing some of the old dogmas of proction and organizational collaboration. In April 2007, the U.S. broke out a once-in-a-century financial sub-prime crisis. In August 2007, it began to sweep the world's major financial markets such as the United States, the European Union and Japan. Followed by the "Du debt crisis", "Greek sovereign debt crisis", the United States forced the appreciation of the RMB and a series of financial confrontation, a smoke free "currency war" has begun
in the face of the expansion of human desire and the collapse of the financial system, human society has come to the crossroads of history, and we begin to question the current financial and monetary system, the chief cause of these disasters. How to choose and where is the future of mankind are the main motive and historical context for the creation of future currency
the orbit of an artificial satellite is an ellipse, and its air resistance is the largest when it flies over the perigee, so the main factor determining the time of the satellite's existence in the air is its perigee height. Secondly, the same perigee height, the greater the apogee height, the longer the operation time. In addition, different shapes and sizes of satellites lead to different air resistance, which is also a factor affecting the operation time of satellites in the air
therefore, the operation time of artificial satellites generally has a certain period
can we make the satellite never fall? If we put the satellite high enough and there is no air there, it can go around the earth forever without falling down. The moon is a satellite of the earth. Its average distance from the earth is 384000 km. Since ancient times, I do not know how many years have passed, the moon is still around the earth year after year. However, it does not mean that the higher the satellite is placed, the longer it is in the air, the better. For example, we use the motion of satellites to study the structure of the earth's upper atmosphere. How can we put satellites into space without air? So how high a satellite should be launched depends on its use in politics, military affairs and scientific research. The altitude of the perigee and apogee of the scientific experiment satellite successfully launched by China on March 3, 1971 is lower than that of the first satellite in China, which is determined by the need to carry out a variety of scientific experiments
satellites are powered by the fuel they carry. Once the fuel is exhausted, it will naturally fall.
the electronic components of the satellite operate, transmit signals and transmit data, using the power provided by the built-in solar panels, and the power provided by the built-in micro nuclear cells. This time, curiosity, the Mars probe to be launched by the United States, will wear nuclear cells instead of solar cells.
classification: chordate, Mammalia, Carnivora, Felidae, cheetah, cheetah species. Cheetah has two subspecies, one is African subspecies, the other is Asian subspecies. There are more subspecies in Africa, with 9000 to 12000. Asian subspecies are relatively few. They mainly live in Iran, and now there are about 300
cheetahs have a trunk length of 1-1.5 meters, tail length of 0.6-0.8 meters, shoulder height of 0.7-0.9 meters and weight of 35-72 kg. The size of male cheetah is slightly larger than that of female cheetah, and the color of cheetah's back is light yellow. It has a lighter abdomen, usually white. It has black spots all over its body. There is a black stripe from the corner of its mouth to the corner of its eyes. This stripe is a feature we use to distinguish cheetah from leopard
monotypic species of cheetah in Carnivora Felidae. It looks like a leopard, but its body is thinner than a leopard, its limbs are slender, and its toes and claws are straight. The head is small and round; The whole body is colorless and yellowish with many small black spots. It is now distributed in Africa
leopard Carnivora Felidae leopard species, also known as leopard. It is widely distributed in Asia and Africa, and in almost all provinces of China. There are more than 20 subspecies in the world and 3 subspecies in China: South China leopard (p.pars fusea), North China leopard (p.p.fontanieri) and northeast leopard (p.p.orientalis)
it is similar to a tiger, but smaller than a tiger. It is 1-1.5 meters long and weighs about 50 kg, with a maximum weight of 100 kg; The tail is nearly 1 meter long; The whole body is orange or yellow, covered with black spots and black stripes. The color of male and female hair is the same
it inhabits in mountains, hills, deserts and grasslands, especially in dense forests. There is no fixed nest. Activities alone. In the daytime, I lie in the trees, or in the grass, or rest in the cave of the cliff, and wander at night. He is good at climbing trees and jumping. He has great courage. He dares to live in the same field with tigers. He can attack big bucks or fierce wild boars. It mainly hunts small and medium hoofed animals, such as muntjac, roe deer, musk deer, sheep, etc., and also eats small carnivores, such as beaver, weasel, etc., occasionally preys on birds and fish.