题干

数轴上①②对应的奋斗目标分别是(    )

A:全面建成小康社会  实现社会主义现代化

B:达到总体小康   实现社会主义现代化

C:解决人民温饱问题  全面建成小康社会

D:全面建成小康社会  实现中华民族伟大复兴

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A

同类题1

“科学家最新研究发现,注射人类大脑细胞的老鼠,其记忆力与智力会比一般老鼠高出4倍”.研究人员称,注入幼鼠的是一种未分化的人类大脑细胞——神经胶质细胞.人类大脑胶质细胞可支持大脑细胞发育,形成大脑细胞结构,供给营养物质.分析上述材料,联系相关知识回答下列问题:

(1)实验用小鼠为一群有先天缺陷的小鼠,根据人类大脑细胞在老鼠体内得以生存的事实,说明这个缺陷主要体现在____ 能力低下.

(2)记忆力与智力均与神经细胞之间的联系有关.人类神经胶质细胞在小鼠大脑增殖,并替代老鼠同类型细胞,使实验鼠的记忆力与智力比一般老鼠高出4倍.可见,人类神经胶质细胞在促进小鼠神经细胞之间形成____ 方面的作用优于小鼠的同类细胞.

(3)注射人类大脑细胞给小鼠,____ (填“能改变”或“不能改变”)小鼠细胞内的遗传物质.注人人类大脑细胞的老鼠____ (填“属于”或“不属于”)克隆动物.

(4)若在体外培养人类神经胶质细胞,则需要满足以下条件:____ 、添加了____ 的培养基、适宜温度与pH、____  的气体环境等.

(5)若将导致人类神经胶质细胞与小鼠同类细胞差异的基因找到,并适时将该基因导人小鼠受精卵,从而获得高智商小鼠.这类获得高智商小鼠的手段涉及到的生物工程手段主要有:________ 等.这类高智商小鼠与植人人类脑细胞的聪明小鼠相比,有性传代后,前者____ (填“一定能”、“可能”或“一定不能”)保留高智商性状,而后者____ (填“一定能”、“可能”或“一定不能”)保留更聪明的性状.

同类题3

阅读理解

    One of the main challenges facing many countries is how to maintain their identity in the face of globalization and the growing multi-language trend. "One of the main reasons for economic failure in many African countries is the fact that, with a few important exceptions, mother-tongue education is not practiced in any of the independent African states." said Neville Alexander, Director of the Project for the Study of Alternative Education in South Africa at the University of Cape Town.

    In response to the spread of English and the increased multi-language trends arising from immigration, many countries have introduced language laws in the last decade. In some, the use of languages other than the national language is banned in public spaces such as advertising posters. One of the first such legal provisions(规定) was the 1994 "Toubon law" in France, and the idea has been copied in many countries since then. Such efforts to govern language use are often considered as futile by language experts, who are well aware of the difficulty in controlling fashions in speech and know from research that language switching among bilinguals is a natural process.

    It is especially difficult for native speakers of English to understand the desire to maintain the "purity" of a language by law. Since the time of Shakespeare, English has continually absorbed foreign words into its own language. English is one of the most mixed and rapidly changing languages in the world, but that has not been a barrier to acquiring superiority and power. Another reason for the failure of many native English speakers to understand the role of the state regulation is that it has never been the Anglo-Saxon way of doing things. English has never had a state-controlled authority for the language, similar, for example, to the Academic Francaise in France.

    The need to protect national languages is, for most western Europeans, a recent phenomenon—especially the need to ensure that English does not unnecessarily take over too many fields. Public communication, education and new ways of communication promoted by technology, may be key fields to defend.