For differential equations with one or two delays and some kinds of symmetry,the Kaplan-Yorke method is an effective tool in the study of the existence of periodic solutions with some particular periods.

Application of Guessing Skills in Chinese Material Reading;

Based on test and psychological theories, this essay concerns why and how to encourage the testees to make good use of guessing strategies in a test.

Test unreliability due to guessing in multiple choice and true/false tests is analysed, and two measures are described: the resolution of defined levels of knowledge and the probability of examinees being incorrectly ranked.

In this paper,a conjecture put forward by G.

In this paper,a conjecture concerning this function,which was put forward in 1997,is proved to be true.

That is analogy is a way of thinking based on some attributes of the identical or similarity of the two or two kinds of things to conjecture some other attributes that are possibly identical and similar.

G.Giuga Guess——One Judge Method of Prime Number;

This paper points out three ways to guessing the meaning of word by way of the context.

On cultivating students ability of the audio-visual thinking in teaching Mathematics Analysis, the paper discusses such five points as: the encouragement of students bold guess, the emphasis on the general analysis, the teaching of students intuition, the improvement of students aesthetic awareness and the building of students cognitive structure.