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 camera is often thought to be a modem invention. But as early 1727, a German physicist 【B1】______ that light darkens silver
The camera is often thought to be a modem invention. But as early 1727, a German physicist 【B1】______ that light darkens silver
admin
2013-03-11
26
问题
The camera is often thought to be a modem invention. But as early 1727, a German physicist 【B1】______ that light darkens silver salt in a chemical 【B2】______ . Using a camera, a big box with a small hole to let the light in, he made 【B3】______ images on the salt. Silver salt is still the 【B4】______ of film today. Then a French scientist made the first 【B5】______ picture by using a special 【B6】______ of metal sensitized with silver salt. A photography he made in 1826 still 【B7】______ . The painter, Daguerre improved on the process 【B8】______ placing common salt the kind we eat on the metal. This was in 1839, 【B9】______ , but the problem was the printing of photographs, and it wasn’t until other scientists developed the kind of paper we now use, that good printing was possible and photograph become truly modem. In 1860, Matthew Bradey was able to take his famous pictures of the American Civil War, 【B10】______ . In the 20th century, George Eastman of the United States simplified film developing, and Dr. Edwin Land invented the so-called "instant" camera with self developing film. 【B11】______ it has taken more than one hundred years for the camera to reach its present condition of technical refinement.
【B2】
选项
答案
compound
解析
转载请注明原文地址:https://jikaoti.com/ti/yUwFFFFM
0
大学英语四级
相关试题推荐
A、Themanshouldbuyhimselfanewsuit.B、Theman’sjeansandT-shirtsarestylish.C、Themancandresscasuallyfortheoccasi
Nomatterwhereyou’regoing,airtravelisanessentialpartofyourtrip.Haveyoueverexperiencedairtravel?Maybeit’sfun
Whilemorepeoplethaneverbeforearelearningforeignlanguagesinpublicand【B1】______institutions,therearethreestriking
Morethan3millionchildrenhavehealthinsurancenow,and______(超过250万的家庭已经摆脱贫困).
A、Physicalappearance.B、Mentalhealth.C、Bodylanguage.D、Socialbehavior.D
A、Toaskforhelpfindingajob.B、Toaskhimtogivehersomeadvice.C、Toinvitehimtogoshoppingwithherlater.D、Tofind
Manypeoplecondemntheverythinfashionmodelswhoareconsideredtohaveanegativeimpactonthebodyimageofallwomen,an
Work-lifeBalance:WaystoRestoreHarmonyandReduceStressFindingwork-lifebalanceintoday’sfrenetically(疯狂)pacedwo
A、Ataclinic.B、Inasupermarket.C、Atarestaurant.D、Inanicecreamshop.C对话中男士说他想吃牛排、炸薯条和巧克力冰激凌当甜点,女士惊呼这些高脂肪高糖分的食品对健康不利,因此
Theinsurancecompanypaidhim$20,000in______afterhisaccident.
随机试题
法兰底座转盘最高转数是280~300r/min。()
以下属于鲁迅知识分子题材的小说的是()
与鞍上池前角相连的是
患儿,男,9岁。2周前咽部疼痛,口服药物后好转,近两日晨起眼睑浮肿,小便色红,到医院就诊,尿潜血试验阳性,镜检每高倍视野8~10个红细胞,血压130/70mmHg,诊为肾炎。患者发热而不恶寒,咽喉疼痛,口干口渴,头面浮肿,尿少色赤,舌质红,苔薄黄,脉浮数,
采用合理的理由来解释所遭受的挫折,以减轻心理痛苦,这种心理防御机制称为()
伟达商场规定其下属的百货、家电、食品等承包组对外开展业务时可以使用伟达商场的名义和公章,但发生的债权债务一概与商场无关。1999年11月2日,该商场百货组以伟达商场的名义,与时尚服装厂签订一份购买5万件服装的合同,合同约定由百货组自行提货,签约后6个月内一
《新民丛报》
一根长为l的棍子在任意两点折断,试计算得到的三段能围成三角形的概率.
Everyonehassufferedfromheadaches,but【C1】______recentlymedicalresearcherswerenotcertainwhatcausedthem.Blewresearch
Geographyisthestudyoftherelationshipofbetweenpeopleandtheland.Geographerscompareandcontrast【C1】______placesont
最新回复
(
0
)