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
2024-10-27
42
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 that 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] 【C8】
选项
A、since
B、after
C、from
D、before
答案
D
解析
根据上下文,所出书的纸是由棉布和麻布制成的,应该是在上个世纪以前。因此正确答案是D。
转载请注明原文地址:https://tihaiku.com/zcyy/3819961.html
相关试题推荐
Enteringthereadingroomofthelibrary,______readingthere,preparingforthe
GeorgeWashingtonwasthefirstmannotakingwhosebirthdaywaspublicly
GeorgeWashingtonwasthefirstmannotakingwhosebirthdaywaspublicly
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
Whydidn’tthemanmisshistrain?[br][originaltext]W:Youmissedyourtrain
Youwillhearacollegelecturertalkingtoaclassofbusinessstudentsabo
Ascientistwhowantstopredictthewayinwhichconsumerswillspendthei
英国的小学教师们正在尝试在课堂上使用随身摄像头,记录表现差的孩子们的行为。【T1】英格兰至少有两家学校已经引进了这种设备进行持续录像,这已经得到了当地教育
Sometheoristsviewchildrenaspassivereceiversofexperience;otherscons
Mostofusknowtostaylowtothefloorifwe’recaughtinafire,orhead
根据以下材料,回答 Howoftendoyouletotherpe
有A、B两个水壶,分别装有A、B升水。现将B壶中的一半水倒入A壶中,再将A壶中的
某套利者在9月1日买入10月份的白砂糖期货合约,同时卖出12月份白砂糖期货合约,
远志的药理作用有()A.抗菌 B.祛痰 C.抗惊厥 D.保肝 E.降血
最新回复
(
0
)