check oil light Hybrid cars, which add an internal combustion engine to pure electric vehicles, aim to reduce the pollution of cars and improve the mileage of pure electric vehicles. Hybrid vehicles have serial and parallel structure. (3) lorries: vehicles mainly used for transporting goods. 1. Enterprise income tax Turning interest into creating equality - bubbles are a sign of market demand and represent a majority of people's expectations of financial returns. We should see it as an opportunity for development. But if we stop, we may continue to centralize wealth, repeat the traditional power structure and miss out on real opportunities. On the basis of introducing marginal concepts and mathematical argumentation, neoclassical has established a formal "perfect" mathematical model for the neoclassical "laissez-faire order" : general equilibrium. The price is the most important independent variable in this model, which can also be called price mechanism. The process of achieving general equilibrium is also a process of social resources guiding the flow of prices, so the price mechanism regulates the allocation of social resources.