Based on a discussion on the concept, expression and study scope of reserves?_production ratio, this paper has reviewed historical changes, rational limits and concerned problems in the study of reserves?_production ratio, and purposefully presented two ways to predict reserves?_production ratio.

This article reviews the analyzing methods and the causes and results of its study scope extension in western economics since the 80s.

The study scope should be widened further from content to literary form,while tracing back origins of "complicated legal cases",smashing the shackles of subject matter,studying the works of exposing regulations of feudal clans and feudal moral principles and ethics,as well as those people s looking.

The concepts of the study area and impact area of traffic impact analysis are elaborated, and the differences between them are defined.

This paper preliminarily delimitates the characters,theoretical basis and research scope of advance financial accounting.

The scope of study in environmental accounting comprises 3 levels——the micro, medium and macro and is confined to the problems of pollution and rehabilitation o.

Therefore,we could recognize the target for research and fields of research by analysing the function of pedagogy, and establish the system of the studies of teaching and studying meta pedagogy and peripheral pedagogy.