Compression ratio refers to the ratio between the total volume of the cylinder and the volume of the combustion chamber, which indicates the degree of gas compression in the cylinder when the piston moves from the lower stop to the upper stop. Compression ratio is an important parameter to measure the performance of automobile engine. At this year's Shanghai international wine and spirits trade exhibition, we found more and more Brazilian exhibitors. It is believed that with the deepening of china-pakistan economic and trade relations, Brazilian wines can make a big difference in the Chinese market. Late last year, as Brazil's wine industry "leader" of the aurora winery has completed a total for the Chinese as much as 2.16 million barrels of wine export agreement, broke the single export record the wine industry in Brazil, which may be the trend of arguments. Two extremes can be envisaged. In an extreme case, each production is done by a single individual, such as a person making a car. In this way, the person is going to trade with a lot of intermediate goods suppliers, and also to trade with the demanders of their products. In this case, all transactions are conducted through the market in many individuals. In another extreme cases, all the production in the economy in a large enterprise, such as the complete car was produced in the enterprise interior, don't need to make any intermediate products trading market. Therefore, the same transaction can be conducted either through the organizational form of the market or through the organizational form of the enterprise. Companies exist, or companies and markets coexist, because some transactions cost less in the enterprise, while others cost less in the market. Larger suppliers can borrow cheaply from the government's regular contributions, which means they have little incentive to raise savings rates to attract customers' deposits and then lend. Passenger car (no more than nine) are classified into ordinary passenger cars, active senior passenger cars, passenger cars, small passenger car, convertible, warehouse back passenger car, station wagon, multipurpose passenger vehicles, short head special passenger cars, off-road car, passenger car, etc. 11 class.