首页
登录
职称英语
The paper industry needed wood pulp in the early 1800s because ______. [br] [or
The paper industry needed wood pulp in the early 1800s because ______. [br] [or
游客
2023-11-19
75
管理
问题
The paper industry needed wood pulp in the early 1800s because ______. [br]
In the early 180Os, the paper industry was still using rags as its basic source of fiber 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 tens of rags each year. 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 quantifies of cheap paper involved leaving the lignin in the wood pulp. But lignin is acidic and its presence in paper has shortened 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 may be in the conditions.
选项
A、did not make much money
B、achieved great success
C、produced paper of high quality
D、produced paper of limited quantity
答案
B
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3200173.html
相关试题推荐
Ican’treadthemarksandnotesJennymadeinthemarginbecausetheyaretoo_
ThepeopleatthepartywereworriedaboutSusanbecausenoonewasaware______
Theoilmustbeusedup,__thelightwentout.A、sinceB、asC、becauseD、forD此题考
Jackcannevergethighmarksinhismathsexam,becausehetendstoregardhis
Hewaspromotedtothehigherpositionbecausehewas______atinterpersonalskil
ScientistsareinterestedinMarsbecause______.[br][originaltext]Scie
ScientistsareinterestedinMarsbecause______.[br][originaltext]Scie
ScientistsareinterestedinMarsbecause______.[br][originaltext]Scie
ThespeakercomparestheEarthtoaspaceshipbecause______.[br][originaltex
Lisasaidthatshemarriedhimbecauseshewascompletely______byhismanners.
随机试题
Theadvantagesofsomeformofinternationallanguageinthemodernworldar
[originaltext]Goodmorning,ladiesandgentlemen,andwelcometothethirdino
TheBermudaTriangleThereisaplaceinthe
LiuXiang
关于存活的心肌的评判()
TraditionalIPpacketforwardinganalyze
四气理论的产生是如何总结出来的()A.从人体的感觉 B.从药物作用于机体
提示左心衰的临床表现是A.脉搏短绌 B.平脉 C.水冲脉 D.奇脉 E.
2008~2012年间,全国石油消费量超过全国石油产量2倍的年份有几
某企业已建项目年总成本为300万元,销售费用、管理费用合计为总成本费用的2
最新回复
(
0
)