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核工记(节选)
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作者 宋起凤 《中华活页文选(初二)》 2010年第1期85-89,96,共6页
季弟②获桃坠③一枚,五分许,横广四分。 全核向背皆山。山坳插一城雉④,历历可数。城颠具⑤层楼,楼门洞敞。中有人,类司更卒⑥,执桴⑦鼓,若寒冻不胜⑧者。
关键词 核工记 中学 语文学习 阅读
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核工记(节选)
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作者 宋起凤 《中华活页文选(初二)》 2010年第7期78-81,187,188,共6页
季弟获桃坠一枚,五分许,横广四分。 全核向背皆山。山坳插一城雉,历历可数。城颠具层楼,楼门洞敝。中有人,类司更卒,执桴鼓,若寒冻不胜者。
关键词 中学 课外阅读 语文教学 核工记(节选)》
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海涵地贫 尺幅千里——试论短新闻的构思
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作者 杨甦 《传媒观察》 1989年第12期23-28,共6页
在“深度报道”、“典型报道”……日益增多的今天,人们在赞誉之余,也深深感到:长新闻太多、短新闻过少、信息量锐减……。为了增加信息量,看来还是应该多发些短新闻;为了提高短新闻的“容量”、“质量”。
关键词 写作规律 《长江日报》 地方报纸 宛县 三度空间 湖北省省长 海涵地负 《羊城晚报》 巨山 核工记
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Development and application of biological technologies in fish genetic breeding 被引量:23
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作者 XU Kang DUAN Wei +4 位作者 XIAO Jun TAO Min ZHANG Chun LIU Yun LIU ShaoJun 《Science China(Life Sciences)》 SCIE CAS CSCD 2015年第2期187-201,共15页
Fish genetic breeding is a process that remolds heritable traits to obtain neotype and improved varieties.For the purpose of genetic improvement,researchers can select for desirable genetic traits,integrate a suite of... Fish genetic breeding is a process that remolds heritable traits to obtain neotype and improved varieties.For the purpose of genetic improvement,researchers can select for desirable genetic traits,integrate a suite of traits from different donors,or alter the innate genetic traits of a species.These improved varieties have,in many cases,facilitated the development of the aquaculture industry by lowering costs and increasing both quality and yield.In this review,we present the pertinent literatures and summarize the biological bases and application of selection breeding technologies(containing traditional selective breeding,molecular marker-assisted breeding,genome-wide selective breeding and breeding by controlling single-sex groups),integration breeding technologies(containing cross breeding,nuclear transplantation,germline stem cells and germ cells transplantation,artificial gynogenesis,artificial androgenesis and polyploid breeding)and modification breeding technologies(represented by transgenic breeding)in fish genetic breeding.Additionally,we discuss the progress our laboratory has made in the field of chromosomal ploidy breeding of fish,including distant hybridization,gynogenesis,and androgenesis.Finally,we systematically summarize the research status and known problems associated with each technology. 展开更多
关键词 fish genetic breeding genetic improvement biological method TRAITS new variety
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