average advance
1.(1) As a whole, the qualities of the urban human settlements construction in Lanzhou becomes better than ever, but the development of the nature subsystem, the construction subsystem, the supporting subsystem and the society subsystem are not in harmony, and the average advance speed of the four subsystems can be described that the supporting subsystem is quicker than the society subsystem, the society subsystem is quicker than construction subsystem and the construction subsystem is quicker than the nature subsystem.
4.It was fed out that the average age of menarche was 15 .01±1 .51, and the average op of menopause was 48.23±2.34. There was a difference in the age of menarche between the 21-year-old and 40-year-old groucps (14.02±1 .08 and 15.57 ±1.65 respehvely). An continuous advanCe was notted in the op of li nationality.

