The Classification of Natural Types and the Charateristic Discriminatory Analysis of Pinus tabulaeformis in Shanxi DIVISION OF FOREST CLIMATIC REGIONS IN HAINAN ISLAND BY STEPWISE DISCRIMINATORY ANALYSIS AN INVESTIGATION ON THE SOIL TYPES AND THEIR VALUE ANALYSIS IN JIANFENGLING REGION,HAINAN ISLAND MULTICOMPONENT STATISTICAL ANALYSIS OF SEXUAL DISCRIMINATION ON ACTINIDIA LINDL