The paper suggests and expounds two principles of teaching vocabulary in TCSL: the frequency grading and morpheme analysis principle.

Using Gaoqifawanzhi spring of Guiyang Erlu as water supply source for example,the paper makes the frequency flux of spring in runoff modulus way and atmosphere precipitation infiltration way combining the data observed,conducts a frequency analysis,and evaluates the water quality.

The method is as follows: use Laser Particle Sizer to obtain data of frequency distribution (calculous), cumulative distribution (integral) and then build mathematic model, lastly do research with computer and combined wit.

Based on the data collected from the 16 sampling plots and 256 sampling squadnats in Picea classifolia community at Qilian Mountains forest area in Gansu Province,this paper analyzed the frequency distribution,synusia structure,and dynamic of Picea ctassifolia community.

It is hypothesized that frequency distribution of both grammatical and lexical cohesion is much higher in good composition than that in poor ones.

Dynamic optimization model about difficulty coefficient and discrimination of exam questions in questions pool;

The Research on National Civil Servant Recruitment Interview Discrimination of Jiangsu Province;

It includes validity,reliability,difficulty and discrimination of the text paper and the items.

Low convergent validity and low discriminant validity were consistently found in most studies.

To evaluate our school′s test quality, collect some relevant information on improvement of teaching quality and establish test items database, a quantitative analysis was performed on the preventive medicine test papers of 40 nursing students to explore the degree of difficulty, degree of distinction, degree of reliability and degree of validity.