The article take vegetation resources along Baiyunebo-Bayinhua section of Baotou-Mandoula Railway as object of study,using the method of vegetation sampling plots investigations and remote sensing.

Study on sample survey scheme in countrywide direct economy loss caused by work safety accidents;

Development Status of Environmental Protection Industry in China--Result analysis on sampling investigation of environmental protection industry in 2003;

Earthquake damage prediction and countermeasures against earthquake disasters based on sampling investigation for village housing of Anhui Province,China

The sampling investigation was conducted during 20 th to 23 th,February 2005.

The further study of some important problems of sampling survey;

The construction of the course and the reform of educating on thd sampling survey;

Sampling survey of hearing disability in Jilin Province;

Through the sample survey on the outside reading of the university students, this paper introduces the reading situation of the current university students, considers the problems existing currently in the outside reading of university students, and puts forward some ideas of improving the work for the readers.

Sample survey is an important way to find statistics;the problem of sample survey by dividing layer is domain estimation in fact.

The application of sample survey method in history research is analyzed.