gravimetric procedure

comparative research on the higher educational population rate among the world most populous countries

世界人口大国高等教育人口比重的比较研究

The prerequisite for u test of comparison of sample rate and population rate

样本率与总体率比较u检验的应用条件

The Error Estimate of Stable Population Rate of Increase and Birth Rate

稳定人口增长率和出生率公式的误差估计

the demand of long-term care facilities has increased as the population rate of elderly people increase yearly.

随著老年人口比例逐年提高，长者对安养机构的需求日增。

In 2003 our urban population rate was 39.1%, not merely far lag behind 80% of the average level of developed country but lower than the world by 50% of the average level too.

2002年我国人口城市化水平为39.1%，不仅远远落后于发达国家80%的平均水平，也低于世界47%的平均水平。