In addition, the national standard has strict regulations on the content of various chemical components of gasoline such as benzene and olefins. Alkenes are high in content, which can produce gelatinous substances in the process, and accumulate in intake manifold and valve catheter. When the engine is in normal working temperature, there is no abnormal phenomenon; When the engine has cooled for some time, the glial will stick the valve inside the valve tube. When you start the engine, you will have a top valve phenomenon. The toxic benzene content should not exceed 1%. 304/5000 Leakage may occur at the interface of the gasoline pipe, which leads to the use of the air conditioning system into the vehicle. If the owner found the car fumes, deal with gasoline pipeline - open interface to check engine hatch, it is easy to discern does the interface of gas leakage, for a period of time after the leakage surface will appear a layer of oil sludge. If the leakage of the gasoline pipe is found, the interface should be tightened or repaired. Finally, a spokeswoman for the tax department confirmed the news, saying it had collected information through the bitcoin exchange and its investors and sources of information to tax the relevant actions. (1) car: a vehicle for carrying personnel (2-9 persons) and their carry-on items and their seats are arranged between the two axes According to the latest standard GB/T 3730.1-2001, cars are mainly divided into passenger cars and commercial vehicles. These managerial accounting questions relate with effective cost assignment and optimal cash strategy tricks of a company enterprise-the appropriate mix of costs management strategies that maximizes the return on your investment and shareholders' wealth while minimizing the expense of operations, simultaneously.