Therefore,real estate tax,turnover tax,city construction tax and resource tax should be imposed as the main tax in developed cities,developing cities,undeveloped cities and resource abundant cities respectively,so that local governments can make the best use of their comparative advantages to develop their local economy.

Initial Exploration on Taking the property Tax for the Main Tax Of the Local Tax System;

And the innovation to the local tax system pattern is the definite range to the local tax powr, main type of tax,perfecting the current tax categories, levying t.

"Efficiency should be first"was produced in the reform of tax system of 1994, in which added - value tax was chosen as a main type of tax.

By using the data of area and main tree species of Guizhou province from 2000 to 2007,and eight different scenarios have been schemed for the annual area of GGP-forests during 2008~2010 and harvest options.

Study on interspecific association of main populations in arborous layer of nature forest in Wuyishan Scenery District;

Variance analysis, X~2 test, Ochiai index, Dice index and Jaccard index, which are based on 2×2 contingency table, were used to study the inter-specific association of 19 main populations of Alsophila spinulosa community in Mopan Gully, Fuling, Chongqing.

Population spatial distribution pattern of 15 main populations of stand layer and undergrowth in Cycas fairylakea community was investigated,in order to discuss the structure and succession direction and provide scientific foundation for the protection of C.