四阶非线性方程两点边值问题

本文应用复合度的方法在f(x,y,z,u)无界的条件下证明了一般的四阶方程y=f(x,y,y′,y″) (*)在边界条件y(0)=A_1,y(1)=A_2,y″(0)=B_1,y″=B(_2或y(0))=A_1,y(1)=A_2,y″(0)=B_1,y(1)=B_2下解的存在性。     

以人为本构建和谐校园

以人为本构建和谐校园是新时期高等学校发展的必然趋势。坚持以人为本，首先以教师为本，走人才强校之路：坚持以人为本，还应坚持以学生为本，促进学生全面发展；同时要正确处理好以人为本与规章制度的关系。     

按部就班 循序渐进--谈谈“大学英语”泛读教学的实践与体会

作为外语教学的重要组部分,泛读教学起着使学生从精读教学中获得的语言知识在实用中得到巩固和拓展的作用.为了达到能让学生广泛、快速、高效地阅读效果,泛读能力的培养应贯穿于整个泛读教学之中.     

蚜虫和蝗虫的性别决定初探

XA型生物性别决定机制的特点:蚜虫的X染色体含X基因的数量小于常染色体组合的Y基因,为0.6-0.8;蝗虫的X染色体与常染色体含X基因与Y基因的数量相同,为1.0;X染色体含的X基因全都能在性别决定中起作用,会是有效性基因;常染色体组则随各种性型的X染色体与常染色体组的数量关系不同,所含的Y基因有的在性别决定中起作用,有的在性别决定中不起作用,有有效性基因和无效性基因之别。由此,决定了蚜虫须经历有性和无性两个世代,以有性和无性两种生殖来完成世代交替,靠营群居生活才能进行繁衍生息;蝗虫不再须经历有性有无性两个世代,只以有性生殖来完成世代交替,营独栖生活也能进行繁衍生自。     

《英语国家概况》的课程特点及教学策略

《英语国家概况》是英语专业一门重要的文化知识课,是传播英语国家社会文化、培养学生跨文化交际能力的主渠道。较之于其它语言课程,该课程有自身的特点。教学中教师应针对该课程的特点,遵循文化教学的基本原则,采取有效的教学策略,从而达到较好的教学效果。     

绿色荧光蛋白和荧光素酶

绿色荧光蛋白和荧光素酶基因是基因工程中广泛使用的两个报告基因。本文从绿色荧光蛋白和荧光素酶的来源、性质、发光机理、检测方法和用途等方面论述了两者的区别。     

Promoting cognitive and social aspects of inquiry through classroom discourse

We investigated how Chinese physics teachers structured classroom discourse to support the cognitive and social aspects of inquiry-based science learning. Regarding the cognitive aspect, we examined to what extent the cognitive processes underlying the scientific skills and the disciplinary reasoning behind the content knowledge were taught. Regarding the social aspect, we examined how classroom discourse supported student learning in terms of students' opportunities to talk and interaction patterns. Our participants were 17 physics teachers who were actively engaged in teacher education programs in universities and professional development programs in local school districts. We analyzed one lesson video from each participating teacher. The results suggest both promises and challenges. Regarding the cognitive aspect of inquiry, the teachers in general recognized the importance of teaching the cognitive processes and disciplinary reasoning. However, they were less likely to address common intuitive ideas about science concepts and principles. Regarding the social aspect of inquiry, the teachers frequently interacted with students in class. However, it appeared that facilitating conversations among students and prompting students to talk about their own ideas are challenging. We discuss the implications of these findings for teacher education programs and professional development programs in China.     

What are you going to be when you grow up？

One day our teacher in charge of class （我们的班主任） calked us, “What are you going to be when you grow up？” Some of my classmates answered him at once one after another.     

培养学生质疑问难能力策略研究

小学阶段是培养学生质疑问难能力的基础和关键。培养学生质疑问难能力是素质教育的需要，有助于学生良好个性的形成。培养学生质疑问难能力，要研究学生学习心理、学习环境和自身的知识和能力，同时也要教给学生质疑问难的方法。     

简论马克思主义人权观

本文是从形成与发展、阶级属性、基本特征等三个主要方面综述了马克思主义人权理论体系，指出了马克思主义人权理论是无产阶级进行革命斗争的强大思想武器，对近代中国人权理论研究与政治斗争，尤其是在当前改革开放和现代化建设事业中具有重要的现实指导意义。