2009年浙江卷压轴题中导数问题浅析

导数部分内容,由于其应用的广泛性,为解决函数问题提供了一般性的方法和思维策略．因此在高考新课程卷中占有较为重要的地位,其考查重点常见的有以下几种：一、函数的性质（单调性、极值、最值）;二、曲线的切线问题;三、不等式恒成立问题;四、     

西北师范学院的函授教育

西北师范学院于一九五六年初成立函授部。同年暑假前,在甘肃省和青海省经考试招收了中文、数学两个专修班,共三百九十四人,学制为三年。专修班主要招收中学教师。他们入学后,经过三年系统的函授学习,基本上达到大学专科毕业水平,能胜任初中的语文和数学的教学工作。一九五七年初,该院对一九五六年暑假前开办的函授专修班进行了总结,制定出《西北师范学院函授教育暂行规程》(草案),与此同时,创办了《函授教育参考资     

浅析我国艺术体操技术发展现况 上海第二届百花奖邀请赛调研报告

上海市第二届百花奖艺术体操邀请赛是继去年十二月第一届之后于今年四月间举行的。来自全国八个省市的十三个代表队云集上海。虽不及去年第一届全国大学生运动会艺体赛的规模庞大,然而却也集中了不少优秀选手,是全运会大赛前的一次水平较高的技术演习。其中北京体院队、北京体院竞技学校、广西、江苏四支队伍分别表演了下届世界艺体锦标赛团体的规定项目三绳三圈;有十个队的33名运动员参加了个人全能比     

女子自由体操小周期训练

女子竞技体操各单项的特点,一年比一年更多地表现在运动员的训练方法上。这不仅反映在整个的训练过程中,而且反映在各个项目的训练量和训练特点上。当前对高级女体操运动员(运动健将)提出的更高要求,使得在自由体操训练过程中必须不断改进和完善其组织与实施的有效方式和方法。而赛前训练的实施问题则具有特别重要的意义。我们对高级(?)动员(运动健将)     

玫瑰红石蒜的染色体核型分析

The  present paper embodies the results of a karyotypic analysis for the species Lycoris rosea Traub et Moldenke.  The voucher specimen, J. Z. Lin 004 is pre- served in the Herbarium of Hanchow Botanical Garden. The chromosome number in root tip cells is found for the first time to be 22, and the karyotype is shown to be an asymme- trical one with rod-shaped chromosomes. A photomicrograph, the karyotype and the idiog- ram are shown in Figs. 1-2. According to Levan et aL.[5], the karyotype formula of the species is 2n=22=22t. But based on the classification presented by Bose and Flory[1], the karyotype formula should be expressed as 2n=22 =C22, and the chromosomes are all with subterminal constrictions.       If regarding 11 as the basic number and centric fusion as the major tendency of karyo- type evolution as proposed by Inariyama[2], Stebbins[6], and Jones[3,4] in particular, L. rosea would be considered as one of the most primitive species in Lycoris from point of view of karyotype evolution. Reciprocal translocations and centric fusions would give rise to V-sha- ped chromosomes. Consequently, the successive decrease in chromosome number may have taken place in the speciation of the genus under discussion. Yet further evidence seems ne-cessary for the verification of the speculation.     

技巧驱动还是概念驱动：数学问题的本质探究

李邦河院士说过：“数学根本上是玩概念的,不是玩技巧,技巧不足道也!”,在传统的数学教学模式中,特别是在高三的复习过程中,很多老师往往重解题而忽略了概念,大搞题海战术、习题分类,有时候虽然重视数学概念,但也仅限于死记硬背,生搬硬套,结果导致审题不清,或者应用不当,也没有很好地形成应用概念的技能,导致学生迁移能力不强,     

长筒石蒜的染色体核型分析

A karyotypic analysis of Lycoris longituba Y. Hsu et Fan was carried out. The voucher specimen, Z. G. Mao 10501, is preserved in the Herbarium of Hangchow Botanical Garden. The chromosome number in root tip cells of the species is found for the first time to be 16, among which 6 are large, V-shaped with submedian primary constric- tions, and the other 10 are short, rod-shaped  with terminal primary constrictions. Photomi- crograph of the chromosome complement and idiogram are given in Fig. 1-3 respectively. The karyotype formula of the species is therefore 2n=16=6m+6t+4t (SAT) in the light of the chromosomal terminology defined by Levan and al.[5]      Based on the view stressed by Jones[3] and Brandham[4], successive fusion of the ch- romosomes should be taken as the essential mechanism for karyotype evolution and specia- tion in Lycoris. Reciprocal translocation, with the loss of one of the centromeres, might be the mechanism of origin for a V chromosome. It is, then, suggested that the decrease in ch- romosome number as a result of fusion of the rods with terminal or subterminal primaryconstrictions has taken place in the speciation of L. longituba.     

吴三桂墓碑考

吴三桂尸体是否为清朝政府所获,300年来多有疑惑。2010年7月,在考察贵州岑巩县之水尾镇马家寨时,听到吴氏秘传人谈过诸多有关陈圆圆梦幻中吴三桂的影子,令人生疑。不久,传出发现一座怪异墓碑。同年10月,再次考察马家寨,对于这座墓碑进行研究的结果证实,这是吴三桂的墓。为此,本文对陈圆圆梦幻中有关吴三桂尸体的行踪和吴三桂墓碑等相关情况进行系统梳理和考证,结论是:墓碑是吴三桂的。本文将对这个墓碑进行考察的情况,加以如实报告。     

《SCI》的特点及其功能

在对《SCI》主要特点进行概述的基础上进而揭示了其四个方面的特殊功能。