首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Man has been storing up useful knowledge about himself and the universe at the rate which has been spiraling upward for 10,000 y
Man has been storing up useful knowledge about himself and the universe at the rate which has been spiraling upward for 10,000 y
admin
2010-02-20
18
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.
【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://kaotiyun.com/show/EYt7777K
0
大学英语四级
相关试题推荐
A、Thisevening.B、Tonight.C、Sometimenextweek.D、Tomorrow.DWhenwillthewomanandherfamilyprobablymovein?
Childrenwhostartspeakinglate______.Itcanbeinferredfromthepassagethatwhena7-monthbabycallshisorhermother"
A、Towork.B、Onholiday.C、Toaparty.D、Toalecture.AW:I’msorry,Ican’tmeetyouonSunday.Mybosswantsmetodoovertim
What’sthemaintopicofthepassage?AccordingtoParagraph4,nearly50percentofchildrensuffermalnutritionin______.
What’sthemaintopicofthepassage?Ifapoorcountrymanagedtoprovideenoughfoodforchildren,theyearlyeconomicgrowth
RobertEllisSmithbelievesidentitytheftisdifficulttodetectandonecanhardlydoanythingtopreventit.Usingaspecial
Thesecondmajorcauseofdeathrelatedtoexcessivealcoholuseis______.Wecaninferfromthepassagethat______.
A、Lookforhiminhisoffice.B、Consulthimoutsideofclass.C、Makeanappointmentwithhim.D、Talktohimduringclassroomhou
Collegeaccommodationusuallyconsistsofasingleroom,andprovidesbothmealsandlinen.Inconclusion,oneofthesuggestio
Theseapplicantswouldliketo__________(尽可能地给领导留下好印象).
随机试题
中药“十九畏”中芒硝畏
下述有关前庭器官毛细胞功能特征的描述,恰当的是
下列除哪项外均是卫气的作用
护士指导患者正确服药的方法,下列不正确的是
妊娠期间羊水量超过(),称为羊水过多。
[背景资料]某水闸工程施工招标投标及合同管理过程中,发生如下事件:事件一:该工程可行性研究报告批准后立即进行施工招标。事件二:施工单位的投标文件所载工期超过招标文件规定的工期,评标委员会向其发出了要求澄清的通知,施工单位按时递交了答复,修改了工期计划
沥青路面基层的主要作用是()
精密、大型设备安装基础需要考虑减小基础振幅、减弱基础振动或控制基础沉降等,最适合采用的基础是()。
ShestudiesinauniversityoftheSouth.
人民警察不得参加罢工。()
最新回复
(
0
)