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丁皓 《职教通讯(江苏技术师范学院学报)》2004,(9):34-35
课堂教学无疑是以科学性为基础的教育教学活动.有了科学性,就能保证知识的正确传授,学生智力的合理发展、能力的逐步提高.但是,实践证明,只强调科学性的课堂教学,又往往显得呆板、生硬.优质的课堂教学应是严密科学性与巧妙艺术性的高度结合.怎样把语文课堂教学的科学性与艺术性结合起来,为学生创造一个知情结合、文质兼美的境界呢?笔者以为要从以下几个主要方面入手. 相似文献
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1974年和1975年,是周恩来辞世前最后两年。在这两年时间里,他同“四人帮”进行了坚决而又讲策略的斗争。周恩来在这两年对“四人帮”的斗争和对邓小平的支持,不仅为中国共产党最终粉碎“四人帮”奠定了基础,也为以邓小平为核心的党中央第二代领导集体的形成奠定了基础。一、不能再搞一场“文化大革命”那样的政治运动1973年底,周恩来病情进一步发展。“四人帮”密谋要在1974年把他的身体搞垮,他们主要采取了两种方式:一是对周恩来使用轮番轰炸的手段。他们明知周恩来重病在身,却大事小事都推给周恩来,轮 相似文献
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INTRODUCTION Functionally graded materials (FGM) possesselastic constants and density that vary gradually withlocation within the material. In one kind of FGM,only the elastic constants vary continuously along oneor more directions, and in the other kind, only thedensity varies gradually with location. We call thelater one density functionally graded materials. Functionally graded materials have attractedmuch interest. Tutuncu and Ozturk (2001) obtainedclosed-form solutions… 相似文献
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This paper presents an overview of the recent progress of potential theory method in the analysis of mixed boundary value problems mainly stemming from three-dimensional crack or contact problems of multi-field coupled media.This method was used to derive a series of exact three dimensional solutions which should be of great theoretical significance because most of them usually cannot be derived by other methods such as the transform method and the trial-and-error method. Further, many solutions are obtained in terms of elementary functions that enable us to treat more complicated problems easily. It is pointed out here that the method is usually only applicable to media characterizing transverse isotropy,from which, however, the results for the isotropic case can be readily obtained. 相似文献