In the process of movement, the body's structure will change with the movement, can strengthen its own constitution, the movement is one kind of activity way that mankind cannot leave. How many textbooks there are about the team? Here's the team Profit is divided into pretax profit and after-tax profit according to its forming process. Profit before tax is also called total profit; Pre-tax profit minus income tax, i.e., profit after tax, also known as net profit The stability and mobility of style is an important category of research style problem. The stability of style, or relative stability, refers to the main style characteristics of a writer once formed, which often runs through many stages and many aspects of the writer's creation. The stability of style is mostly related to the writer's character, disposition, temperament and so on. In addition, national style and ethnic tradition, especially national character, ethnic form, and national language, are often restricted by these factors, and are also important aspects of forming style stability. The change of style mainly refers to the development of style. The maturing of the writer's style, tend to have a development process, even if has formed its own unique style, it is not rigid, but reflect the difference of the object, when writing a specific objective environment and the subjective state of mind, also will be change, show stage.