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1.
目的:了解ABO血型频率和基因频率在不同人群中的分布以及血型与疾病的关系.方法:运用玻片法测定血型,统计并计算满、汉、回三民族ABO血型的基因型频率和基因频率.结果:满、汉、回三民族ABO血型的基因型频率和基因频率存在差异.结论:ABO血型抗原在不同地域不同民族中是有差异的.  相似文献   

2.
目的:了解ABO血型频率和基因频率在不同人群中的分布以及血型与疾病的关系.方法:运用玻片法测定血型,统计并计算满、汉、回三民族ABO血型的基因型频率和基因频率.结果:满、汉、回三民族ABO血型的基因型频率和基因频率存在差异.结论:ABO血型抗原在不同地域不同民族中是有差异的.  相似文献   

3.
本文对怀化汉族586人的ABO血型分布进行了调查.结果是:血型分布特点是O>A>B>AB,基因频率r=0.6125,P=0.2046,q=0.1829.经x2检验,各血型的观察值与期望值符合Hardy-Weinberg定律,  相似文献   

4.
广西民间长诗是广西民歌的重要类别。据现有资料,300行以上的民间长诗作品共63首。广西民间长诗的特点有:各民族分布不均匀、各类别分布不均匀、各地区分布不均匀、少数民族与汉族文化交流密切、叙述本民族人物事件的作品占比过半数、用汉语西南官话方言演唱的作品近半数。同时,在演唱上具有体例多样、比喻起兴、重复排比、夸张双关、乐器伴唱的特性。其传承多为小众传承,主要为师徒传承、口口相传为主,活态传承将越来越困难。因此,抢救性记录现有民间叙事长诗工作尤为重要。  相似文献   

5.
怀化地区汉族ABO血型的分布   总被引:1,自引:0,他引:1  
本对怀化汉族586人的ABO血型分布进行了调查,结果是:血型分布特点是O>A>B>AB,基因频率r=0.6125,P=0.2046,q=0.1829,经x^2检验,各血型的观察值与期望值符合Hardy-Weinberg定律。  相似文献   

6.
传统音乐学是研究音乐与其所处文化环境共生的科学。它的研究目的首先是要阐明各民族、各地区音乐发展的规律,从各民族、各地区的现实音乐状况出发,探索它的起源、形成、繁荣、发展、演变等问题,从而达到对人类音乐文化发展规律的认知。传统音乐的实地调查作为音乐学研究(案头工作)的第一步,要求研究者在资料的搜集、整理和研究上更趋科学和系统,从而能够更加自觉、更加成熟地走向各民族丰富多彩的社会音乐生活。  相似文献   

7.
由于我国地域、民土风情、语言文化与生活习俗之间的差异,导致我国民族音乐的种类日益繁多、历史也更为悠久,所以各民族、各地区及各省市在民族演唱中分别形成了各自独特的音乐风格、演绎特点。中国民族音乐是一种来自各民族特色的民间艺术,极具多样的艺术表现形式和丰富的体裁特征,由各地区不同民族的人们通过长期实践活动而逐步形成与发展的,带有一定的地域风格和民族特色,对传播我国的传统文化具有重要的现实意义。所以对我国民族音乐进行不断传承及发展是目前音乐教学中最为重要的任务。  相似文献   

8.
我国是一个多民族国家,56个民族共同组成中华民族大家庭。55个少数民族与汉族交错分布于全国,具有大杂居的特点;各少数民族在地域分布上又具有相对集中居住的特点。我国各民族这种大杂居小聚居的分布局面,有利于各兄弟民族之间在经济上、文化上密切往来、互相依存、互相吸收、互相帮助,使由56个民族组成的中华民族具有很强的民族凝聚力。 人口最少的两个民族之一的赫哲族(仅0.42万人)是我国分布最东  相似文献   

9.
通过对河西学院汉、回民族学生的ABO血型、单双眼睑、耳垂有无及舌卷曲4对遗传性状的调查,比较了这4对性状的基因频率在两民族间的分布.结果表明:ABO血型、单双眼睑及耳垂有无3对遗传性状的基因频率在汉族和回族间存在明显差异,而舌卷曲基因频率在两民族间差异不大.  相似文献   

10.
对380名正常汉族学生的指纹与血型进行了相关性研究。经X2检验,四种血型的指纹型分布频率,各手指纹型的频率及左、右对应手指指纹组合格局均有显著差异。不同血型男女间各形指纹频率未见有性别差异。结果提示:指纹与血型之间可能有一定的相关性。  相似文献   

11.
在中华民族的精神起源过程中,诗与音乐(作为“声音”自身演进的成熟形态或结构体)在历史之维上具有深刻的同源性,但诗与音乐在明的精神结构中所以分割开来,成为两种有着本质不同的精神(显现)方式,则表明它们在思维之向度上存在着深刻的本体论差异,从本体论角度,弄清诗与音乐的分界及交互关系,以对“声音”的现象学分析为中介,对于深入认识诗与音乐各自的本质特征,具有极为重要的理论意义。  相似文献   

12.
从压电振子的等效电路出发,得到了行波型超声波电动机定子环乃至整个电动机的等效电路.分别对电机控制系统各组成部分进行了分析,并利用电机等效电路达到简化控制系统的目的.实验对研究结果进行了验证.  相似文献   

13.
The current study examined the link between academic enablers and different types of reading achievement measures. Academic enablers are skills and behaviors that support, or enable, students to perform well academically, such as engagement, interpersonal skills, motivation, and study skills. The sample in this study consisted of 61 third‐, fourth‐, and fifth‐grade students (54% male). Academic enablers were rated by classroom teachers via the Academic Competence Evaluation Scales (ACES; DiPerna & Elliott, 2000 ). Four different measures of reading achievement were included: classroom grades, global ratings of reading skills, standardized test scores, and Reading CBM scores. Results indicated that academic enablers were significantly related to each type of reading outcome. Academic enablers accounted for the greatest amount of variance for classroom grades (45%) and the least amount of variance in standardized test scores (11%). Results suggest that academic enablers are an important part of academic success in reading, particularly classroom grades, but when considering the variance accounted for by academic enablers, they alone are not likely to improve Reading CBM scores or standardized test scores.  相似文献   

14.
ON THE PUBLIC AND CIVIC PURPOSES OF EDUCATION   总被引:1,自引:0,他引:1  
A bstract .  In this review essay, Kathleen Knight Abowitz discusses three recent books related to democratic public life and schooling: Susan H. Fuhrman and Marvin Lazerson's The Public Schools , Walter C. Parker's Teaching Democracy: Unity and Diversity in Public Life , and Kevin McDonough and Walter Feinberg's Education and Citizenship in Liberal-Democratic Societies . Abowitz details how each text is inspired by meanings of liberal democracy that evolved during the Enlightenment era, in which individual rights were constitutionally coded and equality came to be a powerful social and educational ideal, and how each book also takes up different sorts of Enlightenment traditions of public life and education, attempting to revitalize their meanings for public education today. Yet while these books are inspiring and instructive in numerous ways, they are also notable for the issues they fail to take into theoretical account, particularly the colonization of public spheres by the private and market-based spheres of commerce, and the ways in which increasing ecological crisis calls for new ways of conceiving our political and educational frameworks.  相似文献   

15.
In general, mathematical representations such as formulae, numbers, and graphs are the inseparable components in science used to better describe or explain scientific phenomena or knowledge. Regardless of their necessity and benefit, science seems to be difficult for some students, as a result of the mathematical representations and problem solving used in scientific inquiry. In this regard, several studies have attributed students’ decreasing interest in science to the presence of these mathematical representations. In order to better understand student learning difficulties caused by mathematical components, the current study investigates student understanding of a familiar science concept and its mathematical component (pH value and logarithms). Student responses to a questionnaire and a follow-up interview were examined in detail. “Measure” and “concentration” were key criteria for students’ understanding of pH values. In addition, only a few students understood logarithms on a meaningful level. According to students’ understanding of scientific phenomena and mathematical structures, five different student models and the critical features of each type were identified. Further analysis revealed the existence of three domains that characterize these five types: object, operation, and function. By suggesting the importance of understanding scientific phenomena as a “function,” the current study reveals what needs to be taught and emphasized in order to help students obtain a level of scientific meaning that is appropriate for their grade.  相似文献   

16.
90~100日龄 Wisten雄性大 21只,随机分成 3 组,并在同样条件下饲养,其中一组在安静条件下处死,另一组在力竭性游泳2小时后处死,第三组在力竭性游泳后立即处死.然后检测它们的血乳酸、血肌酐、血尿酸水平,结果显示力竭性运动后血乳酸增多以及肾血流量和肾过滤率下降是血尿酸水平上升的主要原因。  相似文献   

17.
INTRODUCTIONOursisanincreasinglyglobalera .Nowitisbecomingcommonsensethatweallhavetoliveinaworldwide ,multiculturalsociety .Buttolivewelltogetherisneveraneasything ,andtofacethechallengesofglobalizationmaybringuswellbeyondcommonsense .Inwritingthisessay ,I…  相似文献   

18.
三音节是惯用语最基本的形式,四音节次之。惯用语的语法结构与韵律特征并非毫无关系,不同的语法类型有着不同的韵律特征。不同语法结构类型的音步形式不完全相同,而不同语法结构的声调搭配虽然在一定程度上会受到音节数的影响,但还是存在着特定的声调搭配。  相似文献   

19.
Many factors influence a student’s performance in word (or textbook) problem solving in class. Among them is the comprehension process the pupils construct during their attempt to solve the problem. The comprehension process may include some less formal representations, based on pupils’ real-world knowledge, which support the construction of a ‘situation model’. In this study, we examine some factors related to the pupil or to the word problem itself, which may influence the comprehension process, and we assess the effects of the situation model on pupils’ problem solving performance. The sample is composed of 750 pupils of grade 6 elementary school. They were selected from 35 classes in 17 Francophone schools located in the province of Quebec, Canada. For this study, 3 arithmetic problems were developed. Each problem was written in 4 different versions, to allow the manipulation of the type of information included in the problem statement. Each pupil was asked to solve 3 problems of the same version and to complete a task that allowed us to evaluate the construction of a situation model. Our results show that pupils with weaker arithmetic skills construct different representations, based on the information presented in the problem. Also, pupils who give greater importance to situational information in a problem have greater success in solving the problem. The situation model influences pupils’ problem solving performance, but this influence depends on the type of information included in the problem statement, as well as on the arithmetic skills of each individual pupil.  相似文献   

20.
减数分裂和测交试验原理表明测交后代(Ft)的表型种类和比例,就体现了F_1所形成的配子类型及其比例。本文通过理论分析,根据测交结果,采用卡平方(X~2)测验的方法,确定三对基因之间的遗传关系。为了更迅速准确地完成对其测交结果的分析,编写了苹果Ⅱ机和LAER310机通过的BASIC程序。  相似文献   

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