1. Industrial age The ECB confirmed that it plans to slow its bond-buying efforts to 30 billion euros (22 billion pounds) by the end of September 2018, from January 2018. In the near future, the car owner who has changed the gasoline pump or unloaded the gas pump will not panic if there is a gasoline smell in the car. It is likely that the residue has not been cleaned up after the removal of the vehicle. The probability of such a situation is small, and the general replacement cycle of the gasoline pump is 100 thousand kilometers. But the gasoline filter is connected with the gasoline pump. The replacement cycle is shorter and the gasoline pump needs to be removed when replacing. In this case, simply check the installation of the gasoline pump and clean the surrounding area. Alpesh Paleja, chief economist at CBI, said: "although sales have grown in the past few months, the basic trading conditions for retailers remain difficult. We expect that the pressures on households to actually pay will continue for a while, so retailers still face challenges. " At present, about the nature of the enterprise. Western economists have different views. There is also some debate. Some western economists analyze the nature of the enterprise mainly from the perspective of transaction costs that coase emphasizes.