首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
The library of congress in Washington, D.C. which 【C1】______ the largest collection of books in the world, is fighting a battle
The library of congress in Washington, D.C. which 【C1】______ the largest collection of books in the world, is fighting a battle
admin
2013-01-10
33
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.
【C3】
选项
A、at a time
B、sometime
C、sometime
D、sometimes
答案
D
解析
此句的意思是:一些书的纸张已经破旧发黄,碰到就会破损。at a time:一次; at times也可以表示有时;some time是指相当长的一段时间;some time指某个时间。因此正确答案是D。
转载请注明原文地址:https://kaotiyun.com/show/sChK777K
0
专业英语四级
相关试题推荐
TheWorldHealthOrganizationreportedtheenvironmentalhealthrisks,NOTincluding
Henryreadtheletteragainlesthe______anythingimportant.
Surprisinglyenough,modernhistorianshaverarelyinterestedthemselvesinthehistoryoftheAmericanSouthintheperiodbefo
Itisunfortunatethatnowviolenceandcartoons______themostdistinctivecharacteristicofchildren’sprograms.
AccordingtonewresearchreleasedthisweekfromMiller-Williams,e-commercecustomersfeelthatover80percentoftheirdecis
Dianaisso______tosucceedthatnothingwillstopher.
Oneoftheadvantagesofmostpaidworkisthatitgiveschancesofsuccessandopportunitiesforambition.Inmostworksuccess
Thesmallestwordsinourvocabularyoftenrevealthemostaboutus,includinghonestyandthinkingstyle.Stopandthinkabout
Culturalnormssocompletelysurroundpeople,sopermeatethoughtandactionthatweneverrecognizetheassumptionsonwhichth
Iftalksforthenewtradeagreementstake.foodindustriesinbothcountrieswillbeseriouslyaffected.
随机试题
(2017年聊城东昌府区)《渔樵问答》《梅花三弄》《十面埋伏》《牡丹亭》这四首曲目都是中国的十大古典名曲。()
现病史诊治经过应包括
A.7.6~9.5mB.3.6~7.6mC.1.2~3.6mD.0.5~1.2mE.0~0.5m彼此认识的人的交往距离,许多商业交往多为这个距离
()是指基金销售活动中基金销售机构、基金投资人之间的货币资金转移活动。
下列关于净现值的说法正确的有( )。
产品信誉评价主要评价的内容不包括()。
下列选项中,在进行审批登记手续时,需向所在市、县工商行政管理局申请,报省、自治区、直辖市工商行政管理局或其授权的省辖市工商行政管理局核准,由所在市、县工商行政管理局发给《企业法人营业执照》的是()。
党的十八届四中全会通过的《决定》指出,党委领导政法工作的必须长期坚持的组织形式是()。
基因药物与其所要取代的原有品牌的药物一样,同样数量的药品里含有同样的活性成份。然而,与同品牌的原有药物相比,基因药物对病人所产生的效果有时会有重大的差别。下列哪一项如果为真,最有助于解释上文中所描述的似乎不一致之处?
I’dratheryou(come)______tomorrow.I’mverybusytoday.
最新回复
(
0
)