The general function of deacetylation with the lysine residues is carried out by HDAC enzymes. Apart from this pair of HDACs there exists another enzyme which performs a similar function. The name with this enzyme is SIRT1 also it removes the acetyl group by way of a very unique mechanism. The end product of this enzyme mediated reaction is nicotinamide. Removal of acetyl group by HDACs doesn't involve NAD+ hydrolysis. Inhibitors like trichostatin A, which show specific action against HDACs don't have any action against SIRT1. Financial staff are used to dividing the investment payback period into long-term, intermediate and short-term periods. The term usually refers to more than five years, short term generally refers to a period of less than one year, and the middle term is somewhere in between. Managers also use long, medium and short term to describe the plan. Long-term plan describes the organization in a quite long period (usually more than 5 years) and the development direction of policy, regulation on the group's various departments over a longer period of time in some activities should reach the goal and requirements, mapped the organization long-term development blueprint. Short-term plans specifically provides for all departments of an organization in the current stage, to the future the shorter period especially in the recent period of time, which should be engaged in activities, engaged in such activities should meet the requirement, and thus provides a basis for the ACTS of all members of the organization. Recently, the yield of celestica monetary fund balance treasure has attracted the attention of investors, since August, balance of treasure yields falling, so far, the balance of monthly average yield has fallen below 4%. The first wedge-shaped car was made in 1963, and the car was highly regarded as an expert in car shape design. In 1968, gm's Ozzie toronado improved and developed the wedge-shaped car, and in 1968, it was adopted by the Cadillac premium sedan, eldo. Wedges are widely used in racing cars. Because the car first considers the influence of fluid mechanics (aerodynamics) and other issues on the automobile, the body can be made entirely by wedge, while the ride comfort is considered as a secondary consideration. Like the Italian ferrari in the 1980s, it was a typical wedge shape. Wedge shape for currently considering the high-speed car, whether from the aspects of its modelling concise, move feeling, or from its embodiment of aerodynamics, are conform to the requirements of the modern people's subjective, with a strong contemporary breath, give a person with beautiful enjoyment and speed fast. Japan's Toyota motor co., the MR2, is an engine sports car (the tail is fitted with a flexible flow board) that can be called a car in a wedge car. The accounting income follows the historical cost principle and the matching principle, which is conducive to the objective reflection of the business management responsibility of the enterprise management authorities. But, due to the historical cost principle inherent defects, especially according to the present value of revenue and expenses by historical cost line, makes the calculation of accounting earnings lack of inner logical unity, and the matching principle is difficult to carry out, so that the book value of assets can not reflect its real value, cost cannot be fully compensated. And the economic benefit is measured in the current value, which reflects the actual value of the asset, which is beneficial to the full compensation of the cost.