Interest rate, in the form of expression, refers to the ratio of the amount of interest to the total amount of borrowed capital in a certain period of time. [1] the interest rate is the interest level per unit time of the unit currency, indicating the interest rate. Economists have been looking for a theory that can fully explain the structure and change of interest rates. Interest rates are usually controlled by the central bank of the country and administered by the federal reserve board in the United States. Today, interest rates are one of the important tools for macroeconomic regulation. “We are a trade specialist so all retail enquiries and enquiries from smaller independent installers are handled by our customers, which means they are sharing directly in the success of our campaign.” Sometimes owners during fuel gasoline plus too full, although filler without oil, gasoline is along the line into the canister, canister when releasing steam, together with the gas release, if the air conditioning is under a state of outer loop, the car could smell of petrol. In management, the plan has a double meaning, one is the work plan, is refers to according to the analysis of external environment and internal conditions, put forward in the future a certain period of time to achieve organizational goals and achieve the goal of the solution way. Secondly, plan form, it is to point to in words and index within the organization of the form of expression and organization of different departments and different members of a certain period of time in the future about the management of the direction, content and way to arrange events. High compression ratio if choose low grades of gasoline engine, can make the cylinder temperature rises, the incomplete combustion of gasoline, strong vibration machine, so that the output power down, damage to the parts, fuel consumption and driving. If lower compression ratio engine with high grade oil, can appear "delay" phenomenon, namely the compression ratio is less than the highest point of spontaneous combustion, as will appear incomplete combustion phenomenon, the engine is no good. In just three days, the 30-year bond jumped 16 basis points, the biggest gain since December 2008.