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
37
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] 【C4】
选项
A、been used to
B、used to
C、been used for
D、used for
答案
C
解析
根据上下文,此处应用use被动语态的完成时。因此正确答案是C。
转载请注明原文地址:https://tihaiku.com/zcyy/3801888.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
Thereareseveralpossiblerelationshipsbetweenlanguageandsociety.One
TheancientGreeksdevelopedbasicmemorysystemscalledMnemonics.Thename
《素问》称为"将军之官,谋虑出焉"的脏是()A.肝 B.心 C.脾
不能直接与中药材接触的杀虫防腐剂为A.有机氯、有机磷农药、硫黄 B.氯化苦、磷
2020年,我国粮食种植面积11677万公顷,比上年增加70万公顷。其中,稻谷种
对我国公安机关的专政职能理解正确的有( )A.是指公安机关对危害国家安全的敌对
个人汽车贷款每笔最多展期()次。A.1 B.2 C.3 D.5
验槽时必须具备的资料有()A.岩土工程勘察报告 B.施工图阶段结构图
小儿前囟闭合的时间约在( )。A.3~4个月 B.4~6个月 C.6~12
根据《劳动法》的规定,应当给予特殊保护的未成年工是指()的劳动者。A:年满12周
最新回复
(
0
)