Solution: as long as the gasoline in the tank is exhausted, the extra gasoline vapor in the tank can be fired into the cylinder by the negative pressure of the engine, and no gasoline vapor will overflow. It doesn't seem to be too much of a market to really focus on learning or learning about the importance of learning. More and more, I feel that learning is to keep to the only way to do it for a long time in the market, continuous learning can bring something new to you constantly, in a sense, the ability of learning will be able to represent your trading ability and analysis ability. Western economists further point out that the main factor that leads to the difference between trading costs in markets and businesses is the incompleteness of information. Because of the incompleteness of the information. Any party of a contract will be trying to collect, information and access to what they didn't have to monitor each other's behavior, and try to constraints, and afterwards to punish in advance of each other's default behavior and so on. All these practices produce transaction costs. As a result of these practices in the market and the enterprise can take different forms, so the corresponding transaction costs is not the same, in particular, under the condition of asymmetric information, in the process of market transactions, transaction cost, as a result of these practices are often very high. Therefore, through the organizational form of enterprises, some market transactions can be internalized to eliminate or reduce the high transaction costs generated by some market exchanges. Keloid scars are some in the most unsightly types of scars you can become victim to. These raised scars are large and irregular shaped, often growing well after dark original bounds in the wound and rarely ever subsiding independently. They are reddish purple, smooth, and shiny making people desperate to take them off. There are various goods that falsely claim keloid removal and lots of people may turn to believe that a good solution just doesn't exist. However, keloid scar removal is not impossible! But first you have to find the best treatment. The independent of interest is of positive significance to show the active role of the fund users in the reproduction process.