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异学段同题异构,促计算思维进阶发展
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作者 彭仁杰 《中国信息技术教育》 2023年第9期39-42,共4页
作者围绕“算法”核心概念的建构,在小学、初中和高中三个阶段,通过基于问题解决的综合实践课,剖析了培养学生计算思维的不同层级,探究了计算思维的纵向发展路径。
关键词 计算思维 习进阶 同题 算法 异学段
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同课异构,探寻异学段音乐教学——以《金蛇狂舞》为例
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作者 华芳 《名师在线》 2020年第17期73-74,共2页
基于初高中学生具备不同的生理、心理、知识储备及思维能力这一实际情况,初高中音乐课堂必然呈现出具有异学段特征的教学。例如,在江苏省名师课堂中,音乐特级教师郑文千这样点评一节课:"这是一节典型的符合高中学段的课。"因... 基于初高中学生具备不同的生理、心理、知识储备及思维能力这一实际情况,初高中音乐课堂必然呈现出具有异学段特征的教学。例如,在江苏省名师课堂中,音乐特级教师郑文千这样点评一节课:"这是一节典型的符合高中学段的课。"因此,异学段特征是初高中音乐教师在进行教学设计与实施时需要考虑的重要因素。笔者在一所完全中学担任音乐教师,本文以初高中同课《金蛇狂舞》为例,根据异学段学生展开不同的音乐教学设计与实施,希望给广大同人带来启发。 展开更多
关键词 异学段 同课 《金蛇狂舞》 音乐教
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Morphological changes and allometric growth in hatcheryreared Chinese loach Paramisgurnus dabryanus(Dabry de Thiersant, 1872) 被引量:11
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作者 张云龙 吴巧婉 +7 位作者 胡伟华 汪帆 邵韦涵 张诚明 赵忠波 何辉 樊启学 顾泽茂 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2016年第4期757-762,共6页
The length-weight relationship and allometric growth patterns of hatchery-reared Chinese loach, Paramisgurnus dabryanus(Dabry de Thiersant, 1872), were determined from hatching to 60 days after hatching. A best power ... The length-weight relationship and allometric growth patterns of hatchery-reared Chinese loach, Paramisgurnus dabryanus(Dabry de Thiersant, 1872), were determined from hatching to 60 days after hatching. A best power model was estimated for the length-weight relationship during the early life stages. Positive allometric growth for the head segment, trunk length, tail length and eye diameter was also found in the early life stages, while body depth, tail depth, tail fi n length, pectoral fi n length and barbel length displayed a negative coeffi cient. During the subsequent early developmental stage, the growth coeffi cients showed a clear and common tendency towards isometry for all measured body ratios. The allometric growth changes in Chinese loach during the early stage are possibly the result of selective organogenesis directed towards survival priorities. 展开更多
关键词 Paramisgurnus dabryanus early life stages length-weight relationship allometric growth
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A Molecular Epidemiology Analysis of HIV in Shenzhen and HIV Env Gene Variation Replication Analysis
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作者 陈琳 冯铁建 +1 位作者 李良成 何建凡 《Chinese Journal of Sexually Transmitted Infections》 2002年第3期34-36,共3页
Objective: To analyze molecular trends of the HIV epidemic in Shenzhen. Methods: Serum collected from Shenzhen AIDS patientsbetween 1992-1999 was analyzed using molecular techniques.DNA fragments of the HIV-1 Env gene... Objective: To analyze molecular trends of the HIV epidemic in Shenzhen. Methods: Serum collected from Shenzhen AIDS patientsbetween 1992-1999 was analyzed using molecular techniques.DNA fragments of the HIV-1 Env gene were amplified bynested PCR from uncultured peripheral blood mononuclearcells (PBMCs) from these serum samples. The C2-C3 region ofthe Env gene was sequenced and analyzed. Specific high-riskbehaviors were also analyzed. Results: We found that the transmission of HIV in the citywas mainly through sexual behaviors (46.0%). There werefour HIV-1 subtypes: B', B, C and E with 6.31%, 7.95%,3.09% and 8.92% gene divergence inside each subtype inShenzhen. These results suggested that epidemic times were 6,8, 3 and 9 respectively. The main cpidemic subtypes were Eand B strains. AIDS patient's antigenic variation was slightlyhigher than that of HIV infected individuals. Conclusion: Surveillance data reflect trends and theepidemic time of HIV which will be useful for policy makersto formulate effeive strategies of HIV/AIDS prevention and control in Shenzhen. 展开更多
关键词 HIV gene variation epidemic time
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