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! But the DRAM and NAND semiconductor industries have gone from boom to bust in the face of rising prices and the abundance of falling prices. Will it be any different this time? Or is the need for mobile device memory and disk replacement sufficient to continue to delay the abundance until the foreseeable future? So, again, stay objective and open, don't close yourself, always be curious and curious, so that you can get motivated to keep moving forward. Strictly speaking, closing yourself out, denying someone else is the equivalent of your trading life going into the end. The key is to see what you want. Identifying your pursuit determines the direction and motivation of your study. The market is changing, the pursuit is improving, so you never stop learning. Through continuous thinking and learning again, I found any trading tools on the market and reasonable analysis method has its existence value, but there is a reasonable value, not the existence of absolute value. The market will always operate under these limited factors, but different stages affect the dominant factors of the market. If you close yourself and stick to some idea, then when the market's dominant factor is not your acceptance and understanding, you will be in a state of confusion and loss. Not learning or accepting other valuable things is equivalent to losing a lot of market opportunities and understanding the market. The market is very big, the connotation won't have big change, but the disposition and the expression way but often change. If you don't keep learning and absorbing, you will eventually be eliminated by the market, regardless of who you are. 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%.