(2) passenger car: a rectangular carriage, which is mainly used for vehicles carrying personnel (more than 9 persons) and their carry-on items 1. The amount of the shares, the capital of the company is divided into shares, and the amount of each share is the same, that is, the shares are a reflection of certain value and can be measured in currency; According to Jerome McCarthy, "basic marketing" : a market is a group of potential customers with the same needs; They are willing to trade the goods or services offered by the seller in exchange for something of value, which is the way to meet the demand. The rubber hose in the engine compartment will be used for a long time and it will be a problem for older vehicles. Once aging, gasoline can leak into the engine compartment. The air conditioning system will allow the smell of petrol to enter the car. Therefore, once the rubber tube is old, need to change promptly!