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  3. For me, scientific knowledge is divided into mathematical sciences, natural sciences or sciences dealing with natural world, and

For me, scientific knowledge is divided into mathematical sciences, natural sciences or sciences dealing with natural world, and

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问题      For me, scientific knowledge is divided into mathematical sciences, natural sciences or sciences dealing with natural world, and sciences dealing with mankind. Apart from these sciences is philosophy. All this is pure or【C1】______ knowledge, sought only for the【C2】______ of understanding in order to fulfill the need to understand what is intrinsic and consubstantial (同质的) to man. What【C3】______ man from animal is that he knows and needs to know. If man did not know that the world existed, and that the【C4】______ was of a certain kind, that he was in the world and that he himself was of a certain kind, he wouldn’t be man. The technical aspects or applications of knowledge are equally necessary for man and are of the greatest importance,【C5】______ they also contribute to【C6】______ him as man and permit him to  【C7】______ a life increasingly more truly human.
   【C8】______ even while enjoying the results of technical progress,【C9】______ must defend the primacy and autonomy of our knowledge. Knowledge sought【C10】______ for its practical applications will have immediate and【C11】______ success, but not the kind of important result【C12】______ revolutionary scope is in large part unforeseen, except by the imagination of the Utopians. Let me recall a well-known example. If the Greek mathematicians had not applied themselves【C13】______  investigation of conic (二次曲线) sections zealously and without the least suspicion【C14】______ it might someday be useful, it would not have been possible【C15】______ later to navigate far from shore. The first man to study the nature of electricity could not imagine that their experiments, carried on because of mere【C16】______ curiosity, would eventually lead to modern electrical technology, without which we can scarcely【C17】______ of contemporary life. Pure knowledge is valuable for its own sake, because the human spirit cannot【C18】______ itself to ignorance. But,【C19】______ it is the foundation for practical results that would not have been reached if this knowledge had not been sought【C20】______ .  
【C19】
选项 A、in addition
B、in a word
C、what’s worse
D、on the contrary
答案A
解析 句际关系。分析两个主句“Pure knowledge is valuable for its own sake”(纯理论就其本身而言是很有价值的)和“it is the foundation for practical results”(理论知识也是实践结果的基础)，判断两者之间是顺承关系，而且后者是前者的补充说明，于是选择A。in a word“总之”，what’s worse“更糟糕的是”，on the contrary“正相反”。
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