The degree of difficulty and differentiation of objective test questions in the examination paper of analytical chemistry were calculated.

39%;degree of difficulty is 0.

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.

Evaluation of ultrasonic predicting difficulty of laparoscopic cholecystectomy by receiver operator characteristic curve;

Effects of part of speech, word category and word frequency on difficulty and reaction time of Chinese Words Reasoning Test;

Research on calculating methods of difficulty and differentiation in education survey;

Through the contrast and the analysis of RG code of points (2001edition) issued by FIG and the changes of code of points during recent 25 years, the paper indicates that the main changes are represented by the higher technical difficulties, the greater risk and the originality of technical actions.

: With the objects of the athletes, who attended the 37~(th) Championship Group , and with male free exercise , this paper analyses movement difficulties , patterns and linkage , and movement quality of D plus Group .

The results show that the difficulties of movement mainly embody the creation of stylish multidegree turn, flying movements and enhancement of connection value.

The paper points out that in arranging the entire exercise, it is not necessary to make the difficulty degree too high, provided the entire exercise meets the set requirements.

Prediction for weaving difficulty and relevant measures;