It looks like a big box and has doors and Windows, which people call "box cars". It is named "sedan" in the catalog because it looks like the "sedan chair" of the European ladies used for travel and other occasions. (1) spiritual gain -- spiritual satisfaction; As long as it can stay on the cutting edge in DRAM and memory, Micron can achieve sustained revenue growth. Server, mobile phones, desktop and notebook computer needs more memory and flash memory, because the disk gradually withdraw from the main storage and QLC flash memory as the secondary storage to replace the choice of more powerful. Famous British economist hicks and others argue that the above theory did not consider the factor of income, and therefore unable to determine the level of interest rates, in 1937, and puts forward the is-lm model on the basis of general equilibrium theory. It establishes a theory of interest rates and income at the same time that the four factors of savings and investment, money supply and monetary demand interact.