motor in a car 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. 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. There is no ambiguity in the objective of the concrete plan. For example, business sales managers intend to increase sales by 15 percent over the next six months, and he will formulate specific procedures, budget plans, and schedule schedules, which is the concrete plan. Guideline plans only some general guidelines and action principle, favors the actors free disposition, it points out that the key but don't limit actors on the specific target or specific action plan. For example, a specific plan to increase sales may require a 15 per cent increase in sales over the next six months, while a guidance plan may limit sales by 12 to 16 per cent over the next six months. Compared with the guidance plan, the concrete plan is easier to carry out, assess and control, but lacks the flexibility, and its requirements for clarity and predictability are often difficult to satisfy. breakthrough, but said, the final agreement was established to minimize the trade barriers, and to provide enough time to implement change. So, again, stay objective and open, don't close yourself, always be curious and curious, so that you can get motivated to keep moving forward. Strictly speaking, closing yourself out, denying someone else is the equivalent of your trading life going into the end. The key is to see what you want. Identifying your pursuit determines the direction and motivation of your study. The market is changing, the pursuit is improving, so you never stop learning. Through continuous thinking and learning again, I found any trading tools on the market and reasonable analysis method has its existence value, but there is a reasonable value, not the existence of absolute value. The market will always operate under these limited factors, but different stages affect the dominant factors of the market. If you close yourself and stick to some idea, then when the market's dominant factor is not your acceptance and understanding, you will be in a state of confusion and loss. Not learning or accepting other valuable things is equivalent to losing a lot of market opportunities and understanding the market. The market is very big, the connotation won't have big change, but the disposition and the expression way but often change. If you don't keep learning and absorbing, you will eventually be eliminated by the market, regardless of who you are.