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2010全国英语PETS四级考前训练02
Read the following text.Choose the best word(s)Tor each numbered blank and mark[A],[B],[C]or[D]on ANSWER SHEET 1.
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 21 took a sharp upward leap with the invention of writin9,but even 22 it remained painfully slow for several centuries.The next great leap forward 23 knowledge acquisition did not occur 24 the invention of movable type in the l 5th century by Gutenberg and others.25 t0 1500,by the www.pets12345.com 26 Europe was producing books at a rate of 1000 titles per year.This means that it 27 a full century to produce a library of 100,000 titles.By 1950,four and a half 28 later,the rate had accelerated so sharply that Europe was producing 120,000 titles a year. 29 once took a century now took only ten months.By l960,a 30 decade later,the rate had made another significant jump, 31 a century’s work could
be finished in seven and a half months. 32 ,by the mid.sixties,the output of books on a world 33 ,Europe included,approached the prodigious figure of 900 titles per day.
One can 34 argue that every book is a net gain for the advancement of knowledge.Nev。ertheless we find that the accelerative 35 in book publication does,in fact,crudely 36 the rate at which man discovered new knowledge.For example,prior to Gutenberg 37 11 chemical elements were known.Antimony,the l2th,was discovered 38 about the time he was working on his invention.It was fully 200 years since the 11th,arsenic,had been discovered. 39 the same rate of discovery continued,we would by now have added only two or three additional elements to the periodic table since Gutenber9. 40 ,in the 450 years after his time,certain people discovered some seventy additional elements.And since l900 we have been isolating

the remaining elements not at a rate of one every two centuries,but of one every three years.

21.[A]accumulation [B]development [C]knowledge [D]rate
22.[A]so [B]if [C]then [D]when
23.[A]to [B]by [C]from [D]in
24.[A]until [B]since [C]when [D]before
25.[A]As [B]Due [C]Prior [D]Next
26. [A]examples [B]estimates [C]evidence [D]evaluation
27.[A]would take [B]had taken [C]was taking [D]would have taken
28.[A]decades [B]centuries [C]dozens [D]years
29.[A]This [B]These [C]It [D]What
30.[A]plain [B]historic [C]single [D]eventful
31.[A]now that [B] so that [C]as [D]when
32.[A]However [B]But [C]And [D]Therefore
33. [A] scope [B] sphere [C] scale [D] stretch
34. [A] so [B] hardly [C] accordingly [D] therefore
35. [A] line [B] circle [C] diagram [D] curve
36. [A] fit [B] like [C] resemble [D] parallel
37. [A] about [B] only [C] more than [D] less than
38. [A] in [B] at [C] on [D] for
39. [A] As [B] Had [C] If [D] With
40. [A] In addition [B] In turn [C] Instead [D] In particular

参考译文
一万年来,人类一直在以螺旋上升的速度积累关于自身和宇宙的有用的知识。随着文字的发明,这一速度急剧加快,但即便如此,在几个世纪里,也还是非常缓慢的。知识积累的第二次跃进直到l5世纪古滕博格和其他人发明了活字印刷后才出现。据最乐观的估计,欧洲在1500年以前生产书籍的速度是每年1 000种。这意味着要建一座藏书100万种的图书馆需要整整一个世纪的时间。到1950年,也就是4个半世纪以后,知识积累的速度增长得如此之快以至于欧洲每年生产出12万种图书。曾经需要花一个世纪才能完成的事现在只要用10个月。到l960年,仅仅10年以后.这一速度再次显著提高,一个世纪的工作只要7个半月就可以完成。而且到60年代中期,www.pets12345.com的世界范围内,图书产量达到了每天900种的巨大数字。
每本书都是知识的净增长,对此人们很少有争议,但是我们发现事实上图书出版的增长曲线与人类发现新知识的速度大致相符。例如,在古滕博格之前,只有11种已知的化学元素。第12种元素,锑,就大致是在他致力于他的发明时被发现的。这距第11种元素砷的发现已经整整200年了。如果我们继续以同样的速度发现元素,从古滕博格至今,我们只能往元素周期表上再增加两、三种元素而已。相反,在他之后的450年中,有大约70种元素被发现。而1900年以后,我们分离其余元素的速度不是每两个世纪一种,而是每3年一种。

答案及解析
21.D解析】the rate“速率”,全文自始至终都在谈存储知识——出版书的速率问题。
22.A解析】even so“即使这样”。
23.D解析】in knowledge acquisition“在知识的获得方面”。“在…方面”应用in。
24.A解析】not…until“直到…才”.固定搭配。
25.C解析】prior to“在…前”,固定搭配。
26.B解析】by the www.pets12345.com estimates“依最乐观的估计”。estimate“估计,猜测”,如It is estimated that the painting was worth of $20,000 at that time。evaluate“评估”,如evaluate a school“评估学校”。
27.A解析】过去将来时。
28.B解析】从1500到1950,正好是4个半世纪,因此选centuries。
29.D解析】主语从句,既缺少主语又缺少关联词。
30. C解析】从上文by 1950,by 1960看,强调的是时间的短暂性,只用了一个10年。
31.B解析】SO that“以至于”;now that=since“既然”。
32.C解析】从下文60年代中www.pets12345.com看,文章是要表达60年代一个世纪的工作在七个半月完成的并列关系,都突出了时问的快速。
33.C解析】sphere“球”;stretch表示“地方、空间”;scope表示“覆盖面的宽,用于指空间”;scale表示“大,巨大”,表程度;on a world scale“在世界范围内”,表示一种程度,而不定空间范围。
34.B解析】hardly“几乎不能”,本句意为我们并不能说,每本书都能促进知识的进步。
35.D解析】diagram“示意图、图解”。curve“曲线图”。本文指的是曲线图。
36.D解析】parallel“和…平行”。本www.pets12345.com率曲线和发现新知识的速率曲线平行相似。因此最好选parallel,而不是resemble。
37.B解析】only“仅仅”。
38.B解析】at the time“在那时”。
39.B解析】本句是表示与过去事实相反的虚拟语气,省略if,助动词had提前。
40.C解析】instead“而”,表示与前面陈述的事实相反。