首页
登录
职称英语
The library of congress in Washington, D.C. which 【C1】______ the largest co
The library of congress in Washington, D.C. which 【C1】______ the largest co
游客
2024-10-15
17
管理
问题
The library of congress in Washington, D.C. which 【C1】______ the largest collection of books in the world, is fighting a battle against paper deterioration. The 【C2】______ of the old books, often yellowed and torn, 【C3】______ crumble when they are touched. The main culprit in the battle is the acidic paper tt3at has 【C4】______ making books since the nineteenth century.
Air pollution and moisture 【C5】______ the problem. 【C6】______ the books that are most 【C7】______ destruction are not the oldest books. The paper in books produced 【C8】______ the last century was made 【C9】______ cotton and linen rags, 【C10】______ are naturally low in acid. And the Gutenberg bible, 【C11】______ five centuries ago, was made of thin calfskin, and is in 【C12】______ good shape. But in the nineteenth century, with widespread literacy bringing a demand for a cheaper and more plentiful 【C13】______ of paper, the industry began using 【C14】______ treated wood pulp for making paper. 【C15】______ the chemical in these paper that is causing today’s problem. This problem of paper deterioration is one of 【C16】______ concern. France, Canada, and Austria are all doing research into the new methods of deacidification. A new technology has been 【C17】______ recently, in fact, that allows for mass deacidification of 【C18】______ books at the same time. It costs less than microfilming and 【C19】______ preserves books in their original form. 【C20】______ there will soon be treatment facilities all over the world to preserve and deacidify library book collections. [br] 【C19】
选项
A、still
B、yet
C、ever
D、else
答案
A
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3801903.html
相关试题推荐
ThelibraryofcongressinWashington,D.C.which【C1】______thelargestco
ThelibraryofcongressinWashington,D.C.which【C1】______thelargestco
ThelibraryofcongressinWashington,D.C.which【C1】______thelargestco
ThelibraryofcongressinWashington,D.C.which【C1】______thelargestco
ThelibraryofcongressinWashington,D.C.which【C1】______thelargestco
ThelibraryofcongressinWashington,D.C.which【C1】______thelargestco
ThelibraryofcongressinWashington,D.C.which【C1】______thelargestco
ThelibraryofcongressinWashington,D.C.which【C1】______thelargestco
ThelibraryofcongressinWashington,D.C.which【C1】______thelargestco
ThelibraryofcongressinWashington,D.C.which【C1】______thelargestco
随机试题
Painting,theexecutionofformsandshapesonasurfacebymeansofpigment,
Thetrendtowardrationalityandenlightenmentwasendangeredlongbeforeth
[originaltext]ThreeItalianconsumergroupshaveaccusedMcDonald’sofburde
错畸形的发生及其严重程度与下列哪项因素无关A.不良习惯的作用频率 B.不良习惯
下颌第三磨牙阻生适宜做龈瓣切除术的情况是A.垂直阻生,升支前方有足够空隙,对颌牙
属于"人类社会行为"的是A.睡眠 B.摄食 C.躲避 D.学习 E.性行
生态系统是一种控制系统或反馈系统,它具有反馈机能,能()并维持自己的正常功能。
我国商业银行个人理财业务的萌芽阶段是()。A.20世纪30年代到60年代
(2022年真题)根据《民法典》,关于建设工程合同的说法,正确的有( )。A.建
A. B. C. D.
最新回复
(
0
)