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
Several of the chemical elements were known in prehistoric【C1】______ . One of the great【C2】______ forward in civilization came w
Several of the chemical elements were known in prehistoric【C1】______ . One of the great【C2】______ forward in civilization came w
admin
2014-09-24
65
问题
Several of the chemical elements were known in prehistoric【C1】______ . One of the great【C2】______ forward in civilization came when bronze, an alloy,【C3】______ stone as the main material for tools and weapons. The iron replaced bronze. The first elements【C4】______ were those that were found free in nature or could be readily【C5】______ from their ores at relatively low temperatures. During the Middle Ages, chemistry was mostly practised by the alchemists,【C6】______ tried to turn base metals into gold, and who were interested in discovering a way of living for【C7】______ . But they discovered many important【C8】______ about the metals and some of the most easily attainable compounds. Even before the Middle Ages, people knew how to【C9】______ mercury, tin, and iron from their ores. By the time of Paracelsus, chemistry was developed largely to the effort of【C10】______ medicines.
【C4】
选项
A、knowing
B、know
C、knew
D、known
答案
D
解析
在这一句中,the first elements known=the first elements that were known,known在此是过去分词作定语。
转载请注明原文地址:https://kaotiyun.com/show/OwWO777K
0
在职攻硕英语联考
相关试题推荐
Thebestthingsinlifearefree,andthatincludesairandwater.Swimmingandbreathingusuallydon’tcostanything,butneith
Childrenlivingwithsingleparentsencountermanyproblems.Theyaremore【C1】______stressfulexperiencesthanarechildrenlivi
Today,worldleadersarediscussingclimatechangeandwhat—ifanything—canbedonetocombatglobalwarming.Extremeweatherc
Ifdiplomacywasgoingtosucceed,weneededafundamentallydifferentapproach.
A、Becauseshehadbecomeoverweight.B、Becausesheusedtotravelagreatdeal.C、Becauseshewastiredofherpreviousjob.D、B
A、Theymaybeoverweight.B、Theymayearnlessmoney.C、Themaysufferfromseriousdiseases.D、Theymayhavelastingdamagein
Thepolicearetryingtofindoutthe______ofthewomankilledinthetrafficaccident.
Thedetailsare______thattheymaybehard-pressedtogetadeal.
Bytheendofthiscentury,thepopulationoftheworld______,andsomaythepopulationofthesmallcountry.
"WithtwofriendsIstartedajourneytoGreece,themosthorrendousofalljourneys.Ithadallthedetailsofanightmare:bar
随机试题
【2005年第81题】根据,非抗震设计的钢筋混凝土剪力墙结构中,剪力墙的最小截面厚度要求为下列何值?
项目层次的经济评价,其理论基础主要是()。
下列关于施工顺序的说法,错误的是()。
下列劳务人员中需实行实名制管理的有()。
对统计学几个基本的术语的理解正确的有( )。
采用风险调整贴现率法时,确定风险调整贴现率的关键因素是()。
根据看涨期权一看跌期权平价定理,下列公式正确的有()。
【2014农业银行】《三国演义》开篇称:“天下大势,分久必合,合久必分。”但是这句话未必准确,因为()。
执行算术右移指令的操作过程是(56)。
ThemandidthefollowingthroughtheInternetthatdayEXCEPT______.
最新回复
(
0
)