首页
登录
职称英语
Man has been storing up useful knowledge about himself and the universe at the r
Man has been storing up useful knowledge about himself and the universe at the r
游客
2023-07-30
20
管理
问题
Man has been storing up useful knowledge about himself and the universe at the rate which has been spiraling upward for 10,000 years.
The【C1】______took a sharp upward leap with the invention of writing, but even【C2】______it remained painfully slow for several centuries. The next great leap forward【C3】______knowledge acquisition did not occur【C4】______the invention of movable type in the 15th century by Gutenberg and others.【C5】______to 1500, by the most optimistic【C6】______Europe was producing books at a rate of 1000 titles per year. This means that it【C7】______a full century to produce a library of 100,000 titles. By 1950, four and a half【C8】______later, the rate had accelerated so sharply that Europe was producing 120,000 titles a year.【C9】______once took a century now took only ten months. By 1960, a【C10】______decade later, the rate had made another significant jump,【C11】______a century’s work could be finished in seven and a half months.【C12】______, by the midsixties, the output of books on a world【C13】______, Europe included, approached the prodigious(巨大的)figure of 900 titles per day.
One can【C14】______argue that every book is a net gain for the advancement of knowledge. Nevertheless we find that the accelerative【C15】______in book publication does, in fact, crudely【C16】______the rate at which man discovered new knowledge. For example, prior to Gutenberg【C17】______11 chemical elements were known. Antimony(锑)the 12th, was discovered【C18】______about the time he was working on his invention. It was fully 200 years since the 11th, arsenic(砒霜), had been discovered.【C19】______the same rate of discovery continued, we would by now have added only two or throe additional elements to the periodic table since Gutenberg.【C20】______, in the 450 years after his time, certain people discovered some seventy additional elements. And since 1900 we have been isolating the remaining elements not at a rate of one every two centuries, but of one every three years. [br] 【C19】
选项
A、If
B、With
C、As
D、Had
答案
D
解析
此处是省略“的虚拟语气,对过去的假设,因此D)正确。
转载请注明原文地址:https://www.tihaiku.com/zcyy/2882167.html
相关试题推荐
Whenthepassengerwokeup,______.(他发现自己躺在医院的病房里).hefoundhimselflyinginaho
Manhasbeenstoringupusefulknowledgeabouthimselfandtheuniverseatther
Manhasbeenstoringupusefulknowledgeabouthimselfandtheuniverseatther
Manhasbeenstoringupusefulknowledgeabouthimselfandtheuniverseatther
Manhasbeenstoringupusefulknowledgeabouthimselfandtheuniverseatther
Manhasbeenstoringupusefulknowledgeabouthimselfandtheuniverseatther
Manhasbeenstoringupusefulknowledgeabouthimselfandtheuniverseatther
Manhasbeenstoringupusefulknowledgeabouthimselfandtheuniverseatther
Manhasbeenstoringupusefulknowledgeabouthimselfandtheuniverseatther
Manhasbeenstoringupusefulknowledgeabouthimselfandtheuniverseatther
随机试题
[originaltext]InspiteofstoriesofprosperityintheUnitedStates,noto
-阶电路的瞬态过程是电路变量由初始值按指数规律趋向新的稳态值,趋向新的稳态值,趋
托收承付结算款项的划分方法,分邮寄和电报两种,由()选用。A.承运方 B.付
能够补益肝肾,收敛固涩的药物是A.赤石脂 B.五味子 C.枸杞子 D.山茱
按现行《国家基本比例尺地形图更新规范》,地形图更新方式依据地形要素变化情况、比例
我国规定,出口退税必须在规定的()日内办理完毕。A.10 B.15 C
商业银行当前的外汇敞口头寸如下:瑞士法郎空头20,日元多头50,欧元多头100,
贷款人行使不安抗辩权时,贷款人在合理期限内未恢复履行债务能力并且未提供适当担保的
某企业当年实际销售费用为6000万元,占销售额的30%,企业预计下年销售额增加5
(2017年真题)某气体公司主要产品为高纯氧气、高纯氮气,同时用甲醇裂解法生产超
最新回复
(
0
)