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  3. The rate at which man has been storing up useful knowledge about himself and the universe has been spiraling upward for 10,000 y

The rate at which man has been storing up useful knowledge about himself and the universe has been spiraling upward for 10,000 y

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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【C1】t______a sharp upward leap thousands of years ago,【C2】w______the invention of writing, but even so it remained painfully slow over centuries of time. In knowledge【C3】______(acquire)the next great leap forward did not occur until the invention of movable type in the fifteenth century by Gutenberg and others. Prior【C4】______ 1500, by the most optimistic【C5】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【C6】ac______so sharply by 1950, four and a half centuries later, that Europe was producing 120,000 titles a year.【C7】______ once took a century now took only ten months. By 1960, a【C8】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【C9】______ a world scale by the mid sixties, Europe【C10】______(include), approached the remarkable figure of 1,000 titles per day.
【C7】
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答案What
解析 what引导主语从句，在主句和从句中都做成分。原句译为：原来要花一个世纪的事现在只需要十个月就够了。
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B类竞赛（英语专业本科专科）

大学生英语竞赛（NECCS）

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