how do you start a not for profit organization The "fish-type duck tail" model partially overcomes the lift of the air when the car is traveling at high speed, but it does not fundamentally solve the problem of lift of the fish. After a lot of exploration and experimentation, the designer finally found a new type of model - wedge. This type of vehicle is to tilt the body forward downward, and the back of the body is as straight as a knife, which can effectively overcome lift. Because economists understand earnings as actual material wealth increase, accounting experts think the output value of more than the difference between the input value is profits, there is a contradiction and two kinds of income concept. The specific performance is: Like most of the developed countries, France's car market also belongs to the mature market, tend to be saturated, most new car sales are no longer a first-time buyers of consumer is bought, is more of a used car. Subject to regional economy, the cost of living, and the influence of cultural background, etc, the French are more keen to sta domestic car, in French, so we will find that their vehicle seems to is not match with the national economic development level, and it is precisely the characteristics of these European developed countries have in common, they did not imagine the high to the requirement of cars, more practical. Psa Peugeot Citroen sold 51,188 cars in France in 2014, down 2.2% from a year earlier, according to data from the auto industry. Sales at Renault also fell 0.4 per cent year on year to 37,898 units. In addition, Volkswagen, ford, Toyota and most other car companies suffered declines in France in 2014, and France's current car market is not expected to sell well. The international monetary fund has strongly defended its gloomy forecast of the UK after brexit, saying a warning of a slowdown in growth is imminent. She added that those who plan to pay out of five-year notes would be better off waiting for the New Year. "We are concerned that if the UK decides to leave, it is likely to lead to a weaker pound, higher inflation, lower disposable income and less investment," she said. As hicks income concept did not specify what is called "equal wealth", and thus the income concept formed the basis of many debates concept, and the theory of accounting earnings, especially the capital preservation theory has a great influence. In accounting, people used to call "maintaining the same level of affluence" as capital preservation.