下面是英语六级阅读难点关键句，育路教育网特别为您搜集整理，内容如下：
51. Even the doctoral degree， long recognized as a required “ union card” in the academic world， has come under severe criticism as the pursuit of learning for its own sake and the accumulation of knowledge without immediate application to a professor‘s classroom duties.
52. While a selection of necessary details is involved in both， the officer must remain neutral and clearly try to present a picture of the facts， while the artist usually begins with a preconceived message or attitude which is then transmitted through the use of carefully selected details of action described in words intended to provoke associations and emotional reactions in the reader.
53. Articles in the popular press even criticize the Gross National Production （GNP） because it is not such a complete index of welfare， ignoring， on the one hand， that it was never intended to be， and suggesting， on the other， that with appropriate changes it could be converted into one.
54. Other experiments revealed slight variations in the size， number， arrangement， and interconnection of the nerve cells， but as far as psychoneuaral correlations were concerned， the obvious similarities of these sensory fields to each other seemed much more remarkable than any of the minute differences.
55. The Chinese have distributed publications to farmers and other rural residents instructing them in what to watch for their animals so that every household can join in helping to predict earthquakes.
56. Supporters of the Star Wars defense system hope that this would not only protect a nation against an actual nuclear attack， but would be enough of a threat to keep a nuclear war from ever happening.
57. Neither would it prevent cruise missiles or bombers， whose flights are within the Earth‘s atmosphere， from hitting their targets.
58. Civil rights activists have long argued that one of the principal reasons why Blacks， Hispanics， and other minority groups have difficulty establishing themselves in business is that they lack access to the sizable orders and subcontracts that are generated by large companies.
59. During the nineteenth century， she argues， the concept of the “useful” child who contributed to the family economy gave way gradually to the present day notion of the “useless” child who， though producing no income for， and indeed extremely costly to its parents， is yet considered emotionally “ priceless”.
60. Well established among segments of the middle and upper classes by the mid-1800‘s， this new view of childhood spread throughout society in the late nineteenth and early twentieth centuries as reformers introduced child labor regulations and compulsory education laws predicted in part on the assumption that a child’s emotional value made child labor taboo.
译文：
51、即使是学术界被长时间认作必须“同盟卡”的博士学位，现在也因为仅仅为了学习本身和知识的累积而学习，却不把知识应用到教授的教学职责中去而受到了严厉的批评。
52、尽管收集必要的信息对于两者来说都是需要的，但官员必须以中立和清晰的态度来提供事实的画面，而艺术家从已设字的信息或者态度开始，并将其过用激发读者共鸣和情绪反应的词语描写的动用细节描述出来。
53、流行期刊中甚至有文章批评国民生产总值，因为它并不是一个福利目录，一方面忽视了它从来就没有这种倾向，另一方面的建议是通过正确的改变它才能被转化过来。
54、其他的实验揭示神经细胞的大小、数量、排列和连接的细微变化，但就神经关联而言，这些感觉区域的相似性比那些细微的区别更有意义可言。
55、中国向农民和其它农村住户发放了宣传刊物，指导他们观察动物，以便每户人家都能参与帮助地震预报。
56、星球大战防御系统的支持者们希望它不仅能保护一个遭受核攻击的国家，也希望它能成为使核攻击永不发生的足够威胁。
57、它也不能防止轨道在地球大气层以内的洲际导弹和轰炸机命中目标。
58、人民活动家一直认为黑人和拉丁美人难以在生意上立足的原因是因为他们难以取得大公司的大宗定单和分包合同。
59、她认为十九世纪给家庭经济作出贡献的孩子才“有用”的概念慢慢改变了，今天提到那些没有挣取收入的“无用”孩子，甚至还要花销很多，仍然在情感上被认为是无价的。
60、这种关于孩子的观点到19世纪时已在中上阶级中建立，并于19世纪末20世纪初在社会上广泛传播，当时改革者们推行童工规定和义务教育法，部分来源于孩子的情感价值的假设，这都使得使用童工被禁止了。