The "fish-type duck tail" model partially overcomes the lift of the air when the car is traveling at high speed, but it does not fundamentally solve the problem of lift of the fish. After a lot of exploration and experimentation, the designer finally found a new type of model - wedge. This type of vehicle is to tilt the body forward downward, and the back of the body is as straight as a knife, which can effectively overcome lift. Gas vehicles mainly include liquefied petroleum gas vehicles (LPG vehicles or LPGV) and compressed natural gas vehicles (CNG cars or CNGV). As the name suggests, LPG cars are fueled by liquefied petroleum gas (LPG) and CNG is powered by compressed natural gas. The CO emission of gas vehicles is more than 90 percent less than the gasoline car, the hydrocarbon emission reduction is more than 70 percent, and the nitrogen and oxygen emission reduction is more than 35 percent, which is the current relatively practical low emission vehicle. The concept of accounting income is called accounting income. According to the traditional view, the accounting income refers to the difference between the realized income and the corresponding expenses. It has the following characteristics: The establishment of shares refers to the pledge of the pledge of shares, which can be transferred according to law. The quality of the shares shall be entered into a written contract and shall be registered with the securities registration authority, and the pledge contract shall take effect from the date of registration. The shares may not be transferred after the quality of the shares, except as agreed by the pledgor and the pledgee. Upon the consent of the pledgee, the proceeds from the transfer of the shares by the pledgee shall be paid to the pledgee to liquidate the secured claims or to the third party as agreed with the pledgee. However, the company shall not accept the shares of the company as the subject matter of pledge.