普物中引入"唯一性定理"的必要性和可行性

结合教学工作实际择在普物教材中引入“唯一性定理”的必要性和可行性进行了初步讨论。     

A THEOREM ON THE CONVEXITY OF PLANAR PARAMETRIC CURVES OF DEGREE N

The main result of this paper is a theorem about the. convexity of curves of degree n on a plane. As its application ,we obtained a sufficient condition that a space curve of degree n in R3 has no singularity points and staying points.     

ON THE PURPOSE OF TEACHING “GOOD MANNERS IN ENGLAND”

通过国籍、场合、话题、道别、用餐等方面语言交际的实例，探讨了英国人的礼尚行为，以达到培养学生具有实际的跨文化交际能力的教学目的。