the profit dvd Solution: as long as the gasoline in the tank is exhausted, the extra gasoline vapor in the tank can be fired into the cylinder by the negative pressure of the engine, and no gasoline vapor will overflow. It includes garbage trucks, refrigerated truck trucks, dump trucks carrying sand, concrete transporters, tankers, as well as trailers, semi-trailers, container trucks, etc. Is one of the more common usage refers to various enterprises independent, non-profit organization (can be legal person, also can not), and can be further divided into companies and enterprises, the latter such as partnerships, sole proprietorship enterprise, individual industrial and commercial households, etc. In his theory, money supply is controlled by the central bank and is an exogenous variable with no interest rate elasticity. At this point, monetary demand depends on people's psychological "liquidity preference".