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
2024-10-24
0
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/3814735.html
相关试题推荐
Ididn’tgotohispartylastnight,because______Ichangedmymind.A、onasec
Thepaperindustryneededwoodpulpintheearly1800sbecause______.[br][or
Thepaperindustryneededwoodpulpintheearly1800sbecause______.[original
Everychildunder16inthiscountryhastoattendschoolbecauseeducationis_
He______the9:00trainbecausehedidn’tleavehomeuntil9:10.A、couldn’thave
Peterdid______wellintheexaminationbecausehehadbeenworkingveryhard.A
It’sanindustrybuiltpurely【C1】______image,buttheactors,actressesa
It’sanindustrybuiltpurely【C1】______image,buttheactors,actressesa
It’sanindustrybuiltpurely【C1】______image,buttheactors,actressesa
It’sanindustrybuiltpurely【C1】______image,buttheactors,actressesa
随机试题
AgriculturalSocietyinEighteenth-CenturyBritishAmericaP1:Throughouttheco
[originaltext]Campingcanteachyoumanythings,suchashowtorecognizep
Oneafternoonrecently,twounrelatedfriendscalledtotellmethat,well,
针对帕金森病的肌强直及肢体僵硬可进行的训练是A.松弛训练 B.姿势训练 C.
A.广东B.云南C.海南D.江西、四川、湖北等E.印尼药材阳春砂主产于
房地产市场调查的目的可以通过探测性调查.描述性调查.因果性调查和( )来确定。
我国国有独资公司章程由国有资产监督管理机构制订,需报()批准。A:董事会 B:
企业集团管控模式受到()等一系列因素的影响。A.行业特点 B.产业特征 C
投保人通过支付一定的保险费参与保险计划,可以将偶然的灾害事故或人身伤害事件造成的
如今的孩子很小就接受了各种各样的新生事物,脑子里千奇百怪的东西很多。有时候,他们
最新回复
(
0
)