首页
登录
职称英语
Why did the paper industry need a new source of fiber in the early 180Os? [origi
Why did the paper industry need a new source of fiber in the early 180Os? [origi
游客
2024-10-14
47
管理
问题
Why did the paper industry need a new source of fiber in the early 180Os?
In the early 180Os, the paper industry was still using rags as its basic source of fiber just as it had for many centuries. However, the rag supply couldn’t keep up with the growing demand for paper. The United States alone was using 250 thousand tons of rags each yeas. And a quarter of that had to be imported. It was clear that a new source of fiber was needed to keep up with the demand for paper. The answer to this problem turned out to be paper made from wood pulp, something that was abundantly available in North America. In Canada, the first wood pulp mill was set up in 1866 and it was immediately successful. But while wood pulp solved the problem of quantity it created a problem of quality. Wood contains a substance called lignin. The simplest way to make large quantities of cheap paper involves leaving the lignin in the wood pulp. But lignin is acidic and its presence in paper shortens the life expectancy of paper from several centuries for rag paper to less than a century for paper made from wood pulp. This means that books printed less than a hundred years ago are already turning yellow and beginning to disintegrate, even though books printed much earlier maybe in fine condition. This is bad enough for the older books on your bookshelf but it poses a huge problem for libraries and the collections of government documents.
选项
A、Publishers wanted higher quality paper.
B、Paper made from rags deteriorated too quickly.
C、Wood pulp had become too expensive.
D、The supply of rags was insufficient.
答案
D
解析
语义理解题。“However, the rag supply couldn’t keep up with the growing demand for paper.”可见原料的供应远不能满足快速发展的纸张需求,选项D为正确答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3800771.html
相关试题推荐
Whydidthepaperindustryneedanewsourceoffiberintheearly180Os?[br]
Whydidthepaperindustryneedanewsourceoffiberintheearly180Os?[br]
______,heisreadytoacceptsuggestionsfromdifferentsources.A、Insteadofhi
Inwhichaspect,iTunesturnedouttobeahugesuccessinmusicindustry?[br]
Inwhichaspect,iTunesturnedouttobeahugesuccessinmusicindustry?[orig
Poortransportfacilitiesandthelackofresources,rawmaterialsandenergyal
Doeseverybodyontheearthhaveanequalright______anequalshareofresources
Theindustryhaschanged______asaconsequenceoftheincreaseduseofelectroni
______thepeopledirectlyinvolvedinthetouristindustrymaybenefit,others
WhichofthefollowingareNOTresourcesinthelibrary?[br][originaltext]
随机试题
He/Shethinksanoverheadprojectorisusuallyneeded.[br]He/Shesaysthatfi
A.dataB.getaccustomedC.effectD.sparedE.solveF.associatedG.
Almosteveryactivityinliferequirescommunication.Whenyoumakeaspeech
BiologicalMimicryTheInventionofVelcro
肾源性水肿的开始部位A.从足部开始,下垂部位明显 B.足部开始,腹水常更突出
参苏饮与败毒散二方组成中均含有的药物是()A.半夏苏叶 B.羌活
患者,女,30岁。因尿路感染后需做尿培养。患者神志清醒,一般情况良好。护士留取尿
(2017年真题)信用证按开证行保证性质的不同,可分为()。A.可撤销信用
患者,男性,23岁,学生。1周前因淋雨后"感冒",自服"康泰克"后好转。3天前开
垫隔、覆盖土工布处理基底法在( )会收到较好的效果。A.软土、沼泽地区 B.
最新回复
(
0
)