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 earliest process of making paper was done almost 5,000 years ago in Egypt and the Nile Valley. In those days, paper was made
The earliest process of making paper was done almost 5,000 years ago in Egypt and the Nile Valley. In those days, paper was made
admin
2017-11-17
28
问题
The earliest process of making paper was done almost 5,000 years ago in Egypt and the Nile Valley. In those days, paper was made from strips of the papyrus plant.
Modern paper-making began in China about 2,000 years ago. This process produced paper from cloth, straw, wood or the bark of trees. The raw materials are struck over and over until they become loose. Then they are mixed with water.
After the water has been removed, the flat, thin form remaining is permitted to dry. This becomes a sheet of paper.
Large machines started to be used for making paper near the end of the 16th century. Today, paper-making is a big business. But it is still possible to make paper by hand, since the steps are the same as using big machines.
You should choose paper with small amounts of printing. Old envelopes are good for this reason. Colored paper also can be used, as well as small amounts of newspaper. Small pieces of rags or cloth can be added. These should be cut into pieces about 5 centimeters by 5 centimeters.
Everything is placed in a container, covered with water, and brought to a boil. It is mixed for about 2 hours with some common chemicals and then allowed to cool. Then it is left until most of the water dries up. The substance left, called pulp, can be stored until you are ready to make paper.
When you are ready, the pulp is mixed with water again. Then the pulp is poured into a special box or mold. The mold is made of small squares of wire that hold the shape and thickness of the paper. To help dry the paper, the mold lets the water flow through the small wire squares.
After several more drying steps, the paper is carefully lifted back from the mold. It is now strong enough to be touched.
The paper is smoothed and pressed to remove trapped air. You can use a common electric iron used for pressing clothes.
What is mentioned about the earliest process of making paper?
选项
A、Its procedures.
B、Its influences.
C、Its purposes.
D、Its materials.
答案
D
解析
原文第1段第1句提到最早的造纸方法,第2句指出了最早的造纸原料来自于一种叫“纸草”的植物,因此,本题应选D。原文只有第1段与earliest paper-making有关,A、B、C均缺乏原文依据。
转载请注明原文地址:https://jikaoti.com/ti/MNUFFFFM
0
大学英语四级
相关试题推荐
A、Itwillbelongbeforerobotscanbeusedathome.B、Itwillbeveryexpensivetouserobotsinthefuture.C、Robotswilltake
Peopleappeartobeborntocompute.Thenumericalskillsofchildrendevelopsoearlyandsoinexorably(坚定地)thatitiseasyt
Oceanographyhasbeendefinedas"Theapplicationofallsciencestothestudyofthesea".Beforethenineteenthcentury,s
KeepOurSeasCleanA)Bytheyear2050itisestimatedthattheworld’spopulationcouldhaveincreasedtoaround12billio
Asmedicalevidencemountsthatweareindeedwhatweeat,consumingahealthierdiethasbecomealmostanationalpassioninth
Itseemstomethattoday’sprime-timeleaderneedsatop-5listthatclearlylaysouthisorherpriorities.Whetheryou’rerun
HintsandTipstoSaveMoneyA)Spendless.Thisisnotoversimplifyingthebestwaytosavemoney!Itisessentialifyoua
HintsandTipstoSaveMoneyA)Spendless.Thisisnotoversimplifyingthebestwaytosavemoney!Itisessentialifyoua
Intoday’seconomy,it’stoughenoughbeingarestaurantowner,butnowyouhavetosafeguardyourgarbage,too.FromCalifo
HintsandTipstoSaveMoneyA)Spendless.Thisisnotoversimplifyingthebestwaytosavemoney!Itisessentialifyouar
随机试题
ThenativeAmericana,thepeoplewecallthe"Indians",hadbeeninAmericaformanythousandsofyearsbeforeChristopherColu
患者,男,18岁,右手背遭刀砍伤,嘱患者伸右手指时,中指掌指关节伸直困难,指间关节可伸直。一般手指肌腱断裂缝接后需制动的时间为
硝普钠可以匹莫苯可以
对块石与片石的要求只是强度要求。( )
滨海水产加工厂原是一家大型国有企业,发生以下事项。(1)调整新的领导班子,精简内设机构,中层干部轮岗,将会计部撤并到厂部办公室,同时任命办公室主任吴某兼任会计负责人。撤并以后,会计主要工作重新分工如下:原会计部主办会计继续留任会计工作,原设备处
质量检验具有的功能是_________。
材料:祁连山位于青藏高原东北边缘,是我国著名的高大山系之一,是河西走廊的内陆河流石羊河、黑河、疏勒河的发源地和径流形成区,是河西走廊绿洲非常重要的水源地,对中下游生态系统、水资源利用具有极其重要的影响。保护祁连山生态环境对西部地区经济社会的可持续发展和支
Atthefall2001SocialScienceHistoryAssociationconventioninChicago,theCrimeandJusticenetworksponsoredaforumon
A、 B、 C、 D、 A
Reebokexecutivesdonotliketoheartheirstylishathleticshoescalled"footwearforyuppies(雅皮士,少壮高薪职业人士)".Theycontendth
最新回复
(
0
)