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
A、1727. B、1839. C、1823. D、1860. BWhat does the speaker regard as the official date of the beginning of photography?
A、1727. B、1839. C、1823. D、1860. BWhat does the speaker regard as the official date of the beginning of photography?
admin
2013-06-02
35
问题
The camera is often thought to be a modern invention. But as early as 1727, a German physicist discovered that light darkens silver salt, a chemical compound. Using as a camera, a big box with small hole to let the tight in, he made temporary images on the salt. Silver salt is still the base of film today.
Then a French scientist made the first permanent picture by using a special piece of metal treated with silver salt. A photograph he made in 1826 still exists. A painter improved on the process by placing common salt the kind we eat on the meal. This was in 1839, the official date of the beginning of photography, but the problem was the printing of the photographs, and it wasn’t until other scientists developed the kind of paper we now use. The good printing was possible and photography becomes truly modern.
In the 20th century, a man from the United States simplified film developing, and another American invented the so-called "instant" camera with serf-developing film. If we say that photography came into existence in 1839, it follows that it has taken more than 100 years for the camera to reach its present condition of technical refinement.
选项
A、1727.
B、1839.
C、1823.
D、1860.
答案
B
解析
What does the speaker regard as the official date of the beginning of photography?
转载请注明原文地址:https://jikaoti.com/ti/4w5FFFFM
0
大学英语六级
相关试题推荐
A、Matterhasdifferentlaws.B、Matterhasonecommonlaw.C、Mattersharesthesamelaws.D、Mattersharesnocommonlaw.C双重否定表示肯
A、Shewouldliketomarkpapers,too.B、Shewantstoaskforalightloadtoherprofessor.C、Shewantsthemantotalktothew
A、Thewomanaskedthemantohavedinnerwithher.B、Thewomanhadveryimportantthingtotalkwiththeman.C、Themandidn’ta
PartⅡReadingComprehension(SkimmingandScanning)Directions:Inthispart,youwillhave15minutestogooverthepassageq
Ahundredyearsagoitwasscientifically"proved"byeconomiststhatthelawsofsocietymadeitnecessarytohaveavastarmy
Duringthelastfewyears,therehasbeenan【B1】______increaseinthenumberofshops,storesandsupermarketswhichprovid
Duringthelastfewyears,therehasbeenan【B1】______increaseinthenumberofshops,storesandsupermarketswhichprovid
HelenKeller,aworld-famousauthorandpublicspeakersufferedfromastrange【B1】______whenshewasonly19monthsold.Itmad
A、Hedidn’twanttowarmupforthegame.B、Hedidn’twanttobeheldupintraffic.C、Hewantedtomakesuretheygottickets.
凤凰古城(FenghuangAricientCity)是一座历史文化名城,位于湖南省西部边界地区。它曾经被新西兰(NewZealand)著名作家路易·艾黎(RewiAlley)誉为“中国最美的城市”。凤凰古城始建于清初,在其后三百年的变迁(vici
随机试题
______ananswer,shedecidedtowriteanotherletter.
甲企业只生产一种产品,单价10元,固定成本16600元,销售量达到6000件实现7400元的利润,此种产品的单位变动成本是()元。
社区工作中,地区发展模式的实施策略主要是针对社区中存在的问题,如果一个社区的社区服务和社区资源缺乏,应该采取哪种策略?( )。
倍增十二度转位后为单音程,应为()。
甲出差前将家中的一台彩电交由邻居乙保管。在甲出差期间,乙将彩电卖给丙,丙以为彩电为乙所有,便以合理价款购得。对此,()。
改革的既得利益阻力以及相应的改革难度、成本,也势必会越来越大,不断形成一种积重难返、_______之势。关于这一点,以往许多重要改革,实际上已为此提供了不少______的教训。填入划横线部分最恰当的一项是()。
StoweandhisgirlfriendAhmadstartedavoyageona20-metreshiponSaturdayafternoon.Theywantthevoyagetotakethemthre
Malcolm,Mohammed,Lucy,SallyandRobinallhavepets.Malcolm,MohammedandRobineachhaveadog.Malcolmhasacat.
Thechildren______manytimesnottoswiminthereservoir.
RichNorth,HungrySouthAfewyearsago,therichworld’sworryabouteconomicinteractionwithdevelopingcountrieswasth
最新回复
(
0
)