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131.
为了做好高等院校畜牧兽医类本科生的驻场教学实习工作,落实本科教学人才培养方案,为畜牧兽医行业储备更多优秀人才,文章对高等院校畜牧兽医专业本科生驻场实习的现状及解决途径进行了简要分析,以供借鉴与参考。  相似文献   
132.
This study examined students alternative conceptions of reptiles and amphibians and the extent to which these conceptions remain intact through the elementary (grades 4 and 6), junior, and senior high school years. We administered multiple-choice and free-response instruments to a total of 513 students and interviewed at least 20 students at each educational level to get an in-depth view of their original conceptions. Then, we developed and administered a two-tier multiple choice diagnostic instrumentto assess various levels of students understanding of amphibians and reptiles(N=1267). The results showed that most students were able to classify snakes as reptiles, whereas fewer than 30% of the students across different ages classified sea turtles as reptiles; the remaining 70% classified sea turtles as amphibians. More students were able to correctly classify frogs as amphibians than toads. In most instances, students correctly classified prototypical representatives of the two animal classes more readily than less exemplary representatives, a finding that supports previous research (Trowbridge, J.E. andMintzes, J.J. (1988). Alternative conceptions in animal classification: A cross-age study. Journal of Research in Science Teaching, 25(7), 547–571). Interestingly, the alternative views of sea turtles as amphibians remained intact throughout the school years. Interview data indicated that students classified sea turtles as amphibians largely because sea turtles are able to live in terrestrial and aquatic habitats. Semantically, amphi means living on land and in water. When asked to distinguish between reptiles and amphibians and to classify several species into those two groups, a wide range of alternative conceptions emerged and the origin of those alternative conceptions are discussed. Similar results were obtained when we applied a two-tier multiple-choice diagnostic instrument to assess students understanding of amphibians and reptiles.  相似文献   
133.
利用核移植技术生产人类疾病大鼠模型的研究   总被引:16,自引:0,他引:16       下载免费PDF全文
大鼠是研究人类疾病的理想模型动物,而利用核移植手段是创造遗传修饰大鼠的最佳手段。但由于大鼠卵母细胞和胚胎发育的特殊性,克隆大鼠一直没有取得成功。我们在对大鼠卵细胞活化进行了深入研究的基础上,采用了全新的快速一步法体细胞核移植技术,并且利用蛋白激酶抑制剂(MG132)阻断大鼠卵母细胞减数分裂中期到后期的转变,成功地创造出有繁殖能力的体细胞克隆大鼠。该项研究为人类疾病的研究、相关药物的研制创造了条件。  相似文献   
134.
随着生命科学和医学的发展,仅仅依靠课堂教学培养学生综合素质,效果是有限的,难以满足医学生实验技能和综合素质培养的需要。开展医学院校学生实验动物学创新性教学和第二课堂教学是医学高校创新教育的重要内容,也是培养医学生医学思维模式,提高学生综合素质和创新能力的重要途径。通过初步的探索教学,我们对开设创新性课堂与第二课堂的教师人才培养、教学方法和教学内容改革上有了自己的认识。  相似文献   
135.
为提高《动物细胞工程学》课程的教学质量,构建系统的知识体系,培养学生的科学思维能力和创新能力,从改革教学内容、教学方法、教学手段等方面对《动物细胞工程学》教学进行了改革和尝试,提出了实施教学改革的具体措施,取得了良好的教学效果,为探索适合我国高等院校现代化教学的新模式积累了资料。  相似文献   
136.
蒲松龄在《聊斋志异》中创作了许多以动物为题材的作品,其中有些作品是在以往类似作品的基础上深化拓展,融入作者自己的思想意愿.这些以动物为题材的作品塑造了大量知恩图报、有情有义、智慧敏捷的动物形象,同时他的笔下也出现了少数作恶害人的动物形象.这些或善或恶的动物形象集中体现了蒲松龄对自身、对社会现实人生的悲叹.  相似文献   
137.
实践教学是高等院校动物科学专业最重要的教学形式之一,而实践教学基地,特别是校内实习基地是实施和完成实践教学环节的基础场所。因此,文章从校内实践基地建设的重要性、遵循的原则和基本思路进行了探讨,以提高农业高等院校动物科学专业校内实践基地的建设质量。  相似文献   
138.
吴丹 《海外英语》2012,(14):205-207
Languages convey cultural information while they are used as tools to communicate.With the development of human society and the frequencies of intercultural communication,cultural differences may impact on people’s normal communications.Cultural differences between English and Chinese appear in many aspects of languages.Animal words are influenced by such cultural factors as geographical conditions,historical developments,traditional customs,mythology and fables,etc.So they are endowed with abundant cultural connotations.A similar animal word may have different connotative meanings in English and Chinese respectively,but sometimes different animal words have the same connotations.Whether they are different or not will reflect cultural differences between Chinese and English.Thus,through illustration,classification and comparison of English and Chinese animal words,the thesis aims to explore the cultural differences between English and Chinese.What’s more,the thesis aims to help English learns have a better understanding of English culture and develop the abilities of English language study.  相似文献   
139.
黄晶 《运城学院学报》2012,30(2):48-50,91
畜禽舍是畜禽生长和活动的场所。在养殖畜禽的过程中,畜禽的生活环境对畜禽的健康生长和生产潜力都有着重要的影响。与发达国家相比,我国在畜禽养殖行业的生产水平还是比较落后的,而畜禽舍的环境问题就是导致这一现象的主要原因。基于PIC单片机的畜禽舍环境控制系统的硬件实现是可以有效改善这一问题的。  相似文献   
140.
陈折 《海外英语》2012,(12):245-246
Animals are friends of human beings.Both the Chinese and English language contains a lot of words denoting animals.Along with the development of society,animal words gradually got their connotations in both languages.However,because of different cultural backgrounds of English and Chinese,the implied meanings of the same animal are possibly different.The article starts with the discussion on four causes of special connotation of animal words.Afterwards,the paper makes comparison between the cultural connotation of English and Chinese animal words.It mainly dwells on four types to explore the differences:similarity,part similarity,distinction and vacancy in equivalence.A large amount of examples have been employed to show the differences of connotation between English and Chinese animal words.Hopefully,the barriers in intercultural communication can be removed and mutual-understanding between the cultures will be achieved accordingly.  相似文献   
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