英語四級長篇閱讀練習(xí)題附答案

1、英語四級長篇閱讀練習(xí)題附答案導(dǎo)讀：我根據(jù)大家的需要整理了一份關(guān)于英語四級長篇閱讀練習(xí)題附答 案的內(nèi)容，具體內(nèi)容：得閱讀者得天下，是學(xué)生對閱讀理解在六級英語 考試中重要性的概括。為了幫助大家提高長篇閱讀的解題技巧，下面我為 大家?guī)?，歡迎各位考生參考練習(xí)。英語四級長篇閱讀練習(xí)題原文A).得閱讀者得天下，是學(xué)生對閱讀理解在六級英語考試中重要性的概括。 為了幫助大家提高長篇閱讀的解題技巧，下面我為大家?guī)恚瑲g迎各位考 生參考練習(xí)。英語四級長篇閱讀練習(xí)題原文A) We are surrounded by so much paper and card that it is easy to forget

2、just how complex it is. There are many varieties and grades of paper materials, and whilst it is fairly easy to spot the varieties, it is far more difficuIt to spot the gradesB) It needs to be understood that most paper and card is manufactured for a specific purpose, so that whilst the corn-flake p

3、acket may look smart, it is clearly not something destined for the archives It is made to look good, but only needs a limited life span It is also much cheaper to manufacture than high grade cardC) Paper can be made from an almost endless variety of cellulose-based mat erial which will include many

4、woods, cottons and grasses or which papyrus is an example and from where we get the word "paper" Many of these are very specialized, but the preponderance of paper making has been from soft wood and cotton or rags, with the bulk being wood-basedPaper from WoodD) In order to make wood into

5、paper it needs to be broken down into fine strands Firstly by powerful machinery and then boiled with strong alkalies such as caustic soda, until a fine pulp of cellulose fibers is produced It is from this pulp that the final product is made, relying on the bonding together of the cellulose into lay

6、ers That, in a very small nut shell, is the essence of paper making from wood However, the reality is rather more complicated In order to give us our white paper and card, the makers will add bleach and other materials such as china clay and additional chemicalsE) A further problem with wood is that

7、 it contains a material that is not cellulose Something called lignin. This is essential for the tree since it holds the cellulose fibres together, but if it is incorpora ted into the manufac tu red paper it presents archivists with a problem. Lignin eventually breaks down and releases acid products

8、 into the paper This will weaken the bond between the cellulose fibers and the paper will become brittle and look rather brown and careworn. We have all seen this in old newspapers and cheap paperback books It has been estimated that most paper back books will have a life of not greater than fifty y

9、ears Not what we need for our archivesF) Since the lignin can be removed from the paper pulp during manufacture, the obvious question is "why is it left in the paper?" The answer lies in the fact that lignin makes up a considerable part of the tree By leaving the lignin in the pulp a paper

10、maker can increase his paper yield from a tree to some 95% Removing it means a yield of only 35% It is clearly uneconomic to remove the lignin for many paper and card applicationsG) It also means, of course, that lignin-free paper is going to be more expensive, but that is nevertheless what the arch

11、ivist must look for in his supplies There is no point whatsoever in carefully placing our valuable artifacts in paper or card that is going to hasten their demise Acid is particularly harmful to photographic materials, causing them to fade and is some cases simply vanish!H) So, how do we tell a piec

12、e of suit able paper or card from one that is unsuitable? You cannot do it by simply looking, and rather disappointingly, you cannot always rely on the labe1. "Acid-free" might be true inasmuch as a test on the paper may indicate that it is a neutral material at this time. But lignin can t

13、ake years before it starts the inevitable process of breaking down, and in the right conditions it will speed up enormous1y.I) Added to this, as I have indicated earlier, paper may also contain other materials added during manufacture such as bleach, china clay, chemical whiteners and size This look

14、s like a bleak picture, and it would be but for the fact that there are suppliers who will guarantee the material that they sei 1 If you want to be absolutely sure that you are storing in, or printing on, the correct material then this is probably the only way.J) Incidentally, acids can migrate from

15、 material to materia1 Lining old shoe boxes with good quality acid-free paper will do lit tie to guard the cont ents The acid will get there in the end Paper from RagK) Paper is also commonly made from cotton and rag waste This has the advantage of being lignin-free, but because there is much less c

16、otton and rag than trees, it also tends to be much more expensive than wood pulp paper You will still need to purchase from a reliable source though, since even rag paper and card can contain undesirable additivesL) A reliable source for quality rag papers is a recognized art stockiest Many water co

17、lor artists insist on using only fine quality rag paper and boardM) The main lesson to learn from this information is that you cannot rely on purchasing archival materials from the high street The only safe solution is to purchase from specialist suppliers It may cost rather more, but in the end you

18、 will know that your important and valuable data and images have the best home possible 英語四級長篇閱讀練習(xí)題選項1. The corn-flake packet is cheaper than high grade card2. There are a lot of mat erials which can be used for making paper, but the superiority ones are soft wood, cotton and rags3. During the whole

19、 manufacturing process, the final product is made from a pulp of cellulose fibres4 In order to make white paper and card, the makers will add bleach5. Liguin is essential for the tree but it will make paper easy to break6. Many paper producers will preserve lignin during manufacture, because leaving

20、 the lignin will make more paper from a tree7. Acid is particularly harmful to photographic materials8 If the lignin is removed from the paper, the paper will be more expensive9 Although free of lignin, paper made from cot ton and rag waste can also cost more money than wood pulp paper because there

21、 is much less cotton and rag than trees10. What we can learn from "Paper from Rag" is tha t you had bet ter buy archival materials from specialist suppliers.英語四級長篇閱讀練習(xí)題答案：1. B根據(jù)題干中的信息提ZK詞cornflake packet, high grade card,可定 位到文章第二段，該部分最后提到corn-flake packet在制造過程中比高 等級的紙(high grade card)便宜.2. C根據(jù)題干中的信息提示詞soft woo