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  3. The rate at which man has been storing up useful knowledge about himself and

The rate at which man has been storing up useful knowledge about himself and

游客2023-10-16  57
问题     The rate at which man has been storing up useful knowledge about himself and the universe has been spiraling upward for 10,000 years. The rate【46】t______a sharp upward leap thousands of years ago,【47】w______the invention of writing, but even so it remained painfully slow over centuries of time. In knowledge【48】______(acquire) the next great leap forward did not occur until the invention of movable type in the fifteenth century by Gutenberg and others. Prior【49】______1500, by the most optimistic【50】est______, Europe was producing books at a rate of 1, 000 titles per year. This means that it would take a full century to produce a library of 100, 000 titles. The rate had【51】ac______so sharply by 1950, four and a half centuries later, that Europe was producing 120, 000 titles a year.【52】______once took a century now took only ten months. By 1960, a【53】s______decade later, the rate had made another significant jump, so that a century’ s work could be completed in seven and a half months. And, the output of books【54】______ a world scale by the mid sixties, Europe【55】______(include), approached the remarkable figure of 1,000 titles per day. [br]
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答案 included
解析 原文在计算世界书籍出版数量时，也把欧洲包括在内，因此欧洲是“被包括”在内，故使用include的过去分词做后置定语。
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