【Abstract】Ralph Emerson was a leading American poet， as well as a philosopher known for his championship of the America......

DANGDAI　　Vol. 253， No. 3’2020　　Fiction　　Stay for a Moment Jia Pingwa 4　　Stories　　All World Covered with Snow Z......

选取肇庆市6个国家基本气象站1962—2018年逐月降水资料,基于标准化降水指数SPI,利用线性回归、M-K突变检验、Morlet连续复小波分......