【单选题】
{{U}} (69) {{/U}}even while enjoying the results of technical progress,{{U}} (70) {{/U}}must defend the primacy and autonomy of our knowledge. Knowledge sought{{U}} (71) {{/U}}for its practical applications will have immediate and{{U}} (72) {{/U}}success, but not the kind of important result{{U}} (73) {{/U}}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{{U}} (74) {{/U}}investigation of conic (二次曲线) sections zealously and without the least suspicion{{U}} (75) {{/U}}it might someday be useful, it would not have been possible{{U}} (76) {{/U}}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{{U}} (77) {{/U}}curiosity, would eventually lead to modern electrical technology, without which we can scarcely{{U}} (78) {{/U}}of contemporary life. Pure knowledge is valuable for its own sake, because the human spirit cannot{{U}} (79) {{/U}}itself to ignorance.But,{{U}} (80) {{/U}}it is the foundation for practical results that would not have been reached if this knowledge had not been sought{{U}} (81) {{/U}}.
B．to
C．with
D．by
网考网参考答案：B
网考网解析：
[精解]考查介词，固定搭配。apply sth. to...“将…应用于…”。apply for“申请”apply with“配…以使用”。 document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>
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