首页
登录
职称英语
The paper industry needed wood pulp in the early 1800s because ______. [original
The paper industry needed wood pulp in the early 1800s because ______. [original
游客
2024-10-24
36
管理
问题
The paper industry needed wood pulp in the early 1800s because ______.
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、wood pulp was of good quality
B、wood pulp was very cheap
C、rags were not enough
D、rags could not be obtained in the U. S.
答案
C
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3814734.html
相关试题推荐
Whatistheplanmainlyabout?[originaltext]Cityofficialshaveapproved
WhatdidNOThappenaftertheintrusionofthetwomen?[originaltext]Asub
WhichofthefollowingdidNOThappentotheoperahouse?[br][originaltext]
WhichofthefollowingdidNOThappentotheoperahouse?[br][originaltext]
Whatisthepassagemainlyabout?[br][originaltext]Internetexpertsare
Whatisthepassagemainlyabout?[br][originaltext]Internetexpertsare
Whatisthepassagemainlyabout?[originaltext]Internetexpertsaremeetin
Thespeakersareina______.[br][originaltext]W:Sir,you’vebeenusingtheO
Thespeakersareina______.[br][originaltext]W:Sir,you’vebeenusingtheO
WhichofthefollowingisNOTtrueaboutthebook?[br][originaltext]W:CanI
随机试题
关于市价指令,下列说法正确的有()。A、按当时市场价格即时成交的指令B、成交速度快C、指令下达后不可更改或撤销D、客户不须指明具体的价位A,B,
Itisacommonthemeinmanysciencefictionstoriesthattheworldmayoneday
某开发区一工程项目因施工升降机制动器长时间维护不到位,制动失效,导致吊笼事故,4
目前地铁车站施工的主要工法有明挖法、暗挖法、盖挖法及盾构法。充分利用围岩的自承作
彩色光的基本参数有()。A.明亮度 B.色差 C.饱和度 D.色调
下面( )属于常见的银行理财产品风险类型。A.利率风险 B.政策风险 C
从所给的四个选项中,选择最合适的一个填入问号处,使之呈现一定的规律性:
人本治疗模式是由美国心理学家()提出的。A.汉金斯 B.莫瑞 C.罗杰斯
注册物业管理师每年接受继续教育时间应当不少于()学时。 A.30B
以下属于直流电机结构中转子部分的是()。A.电机的端盖 B.电刷架 C.
最新回复
(
0
)