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
2023-11-19
551
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:http://tihaiku.com/zcyy/3200172.html
相关试题推荐
WhyhasthereturnofDiscoverybeendelayedfor24hours?[br][originaltext]
WhyhasthereturnofDiscoverybeendelayedfor24hours?[originaltext]Th
WhodidPresidentBushmeetwith?[originaltext]AftermeetingwithDefenseSe
Whatisthetalkmainlyabout?[br][originaltext]I’mgoingtointroduce
Whatisthetalkmainlyabout?[br][originaltext]I’mgoingtointroduce
Whatisthetalk’mainlyabout?[br][originaltext]Areelectriccarsthew
Whatisthetalk’mainlyabout?[br][originaltext]Areelectriccarsthew
Whatisthetalk’mainlyabout?[originaltext]Areelectriccarsthewayof
Whatistherelationshipbetweenthespeakers?[br][originaltext]M:Hi,Sue.
Whatistherelationshipbetweenthespeakers?[originaltext]M:Hi,Sue.Where
随机试题
WeliveinsouthernCaliforniagrowinggrapes,afirstgenerationofvintners
中国三大石窟分别是莫高窟、云冈石窟、龙门石窟。()
同文馆的设立与下列哪一历史事件直接相关?()A.洋务运动 B.戊戌变法
线路带电作业时重合闸()。
让一部分人、一部分地区先富起来,最终达到共同富裕,这一思想所体现的是()。A.主
Ⅰ(v+m)=Ⅱc是()。A.社会资本扩大再生产的前提条件 B.社会资
下列属于《预算法》的立法宗旨有()。A、强化预算的分配和监督职能 B、健全财政
项目清偿能力分析包括的内容有( )。A.项目总投资 B.项目经济分析 C.项
某市电力调度楼需设置一套火灾自动报警系统。请确定: 该控制室应选择()火灾
双香豆素过量引起的出血可用A.硫酸鱼精蛋白 B.叶酸 C.维生素K D.尿
最新回复
(
0
)