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
Diamond is the hardest naturally occurring substance known. It is the most popular gemstone and because of its extreme 【C1】_____
Diamond is the hardest naturally occurring substance known. It is the most popular gemstone and because of its extreme 【C1】_____
admin
2019-03-14
81
问题
Diamond is the hardest naturally occurring substance known. It is the most popular gemstone and because of its extreme 【C1】______(hard), it is also used for various industrial purposes. Scientists are still 【C2】______(sure)of the exact process by which diamonds are naturally formed, but it is certain that both extreme heat and enormous pressure are needed. It is, therefore, likely that diamonds were formed far【C3】be______the Earth’s surface where these conditions exist. The first synthetic diamonds were successfully produced in the 1950s, but the best and largest stones are still those created by nature.
The word ’ diamond’ comes from the Greek ’ adamas’ , which means invincible, but the first definite reference to diamonds occurs in Roman literature of the first century A. D. The diamonds known to the Romans came from India, which was the only 【C4】______(supply)of the stones until the eighteenth century. In 1762, diamonds were discovered in Brazil, and then in 1866 in South Africa, the main source of diamonds in the world today.
The idea that men should give diamonds to the women they 【C5】______is quite new. It was invented in the last century by De Beers, the company that owns the South African diamond mines. The idea that ’diamonds are forever’ does not hold water either. Although diamonds are very hard, they can be【C6】dam______.
The largest of all known diamonds was the Cullinan. It was【C7】disc______in South Africa in 1905 and given to Edward VII, king of Great Britain. It was cut into smaller stones, the largest of which—and still the largest cut diamond in 【C8】______(exist)—is called the Star of Africa.
There have been a lot of diamond thefts in recent years, but scientists can now mark stones to show who own them. Usually this mark is 【C9】______(visible), so thieves can’t tell if a diamond is marked. 【C10】O______the people who know how to make the mark appear can tell whether a diamond is marked or not.
【C3】
选项
答案
below
解析
(该句的意思是“因此,钻石很可能形成于地表以下很深的地方,这样的地方具备它形成的条件。”由给出的单词部分可知本题应填入的单词为“below”。)
转载请注明原文地址:https://kaotiyun.com/show/KwNK777K
本试题收录于:
C类竞赛(非英语专业本科)题库大学生英语竞赛(NECCS)分类
0
C类竞赛(非英语专业本科)
大学生英语竞赛(NECCS)
相关试题推荐
Stereotypesaretroublesomebecausetheyareoftenindiscriminate,exhibitanallnessorientation,andcanproducefrozenevalu
BecauseoftheWatergateScandal,President______resignedfromhisoffice.
Accordingtoexperts,companionshipandsocialsupportarevitaltobothourpsychologicalandphysicalwell-being—onereason,p
Accordingtoexperts,companionshipandsocialsupportarevitaltobothourpsychologicalandphysicalwell-being—onereason,p
Robotsareusefulinexploringspacebecausetheycanworkintheconditionswhichexistinspace.Suchrobotsusuallylooklike
Stereotypesaretroublesomebecausetheyareoftenindiscriminate,exhibitanallnessorientation,andcanproducefrozenevalu
Stereotypesaretroublesomebecausetheyareoftenindiscriminate,exhibitanallnessorientation,andcanproducefrozenevalu
Accordingtoexperts,companionshipandsocialsupportarevitaltobothourpsychologicalandphysicalwell-being—onereason,p
Accordingtoexperts,companionshipandsocialsupportarevitaltobothourpsychologicalandphysicalwell-being—onereason,p
随机试题
TV显示器上显示的图像对比度取决于
女,25岁,咳嗽、咳脓痰10年,间歇咯血,痰量40ml/d;体检肺部可闻及固定而持久的湿性啰音;胸片两下肺纹理紊乱。诊断应首先考虑
1/500丘陵地(2°~60°)地形图上,等高线所采用的基本等高距是多少?[2001年第73题]
承包商在进行合同实施趋势分析时,需针对合同实施偏差情况以及可以采取的措施,分析在不同措施下合同执行的结果与趋势,包括()等。
货币政策的构成部分有()。
下列不属于其他代理业务的是()。
应交由有限责任公司股东大会特别决议的事项有()。
计算:。
A、1B、16C、36D、49A圆圈中的数字从6开始依次可看作61,52,43,34,25,(16)。
ItisalwaysatoughtasktodecideontheperfectgiftforyourperfectmomonaMother’sDay.Tooffer【B1】______toyourproble
最新回复
(
0
)