首页
登录
职称英语
[img]2016m12s/ct_eyyjscz2015j_eyyjsccloze_0151_201611[/img] Diamond is the h
[img]2016m12s/ct_eyyjscz2015j_eyyjsccloze_0151_201611[/img] Diamond is the h
游客
2024-08-15
10
管理
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. [br] 【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://tihaiku.com/zcyy/3720412.html
相关试题推荐
[img]2016m12s/ct_eyyjscz2015j_eyyjsccloze_0151_201611[/img]Diamondistheh
[img]2016m12s/ct_eyyjscz2015j_eyyjsccloze_0151_201611[/img]Diamondistheh
[img]2016m12s/ct_eyyjscz2015j_eyyjsccloze_0151_201611[/img]Diamondistheh
[img]2016m12s/ct_eyyjscz2015j_eyyjsccloze_0151_201611[/img]Diamondistheh
[img]2016m12s/ct_eyyjscz2016j_eyyjsccloze_0121_201611[/img]Modernsocietye
[img]2016m12s/ct_eyyjscz2016j_eyyjsccloze_0121_201611[/img]Modernsocietye
[img]2016m12s/ct_eyyjscz2016j_eyyjsccloze_0121_201611[/img]Modernsocietye
[img]2016m12s/ct_eyyjscz2016j_eyyjsccloze_0121_201611[/img]Modernsocietye
[img]2016m12s/ct_eyyjscz2016j_eyyjsccloze_0121_201611[/img]Modernsocietye
[img]2016m12s/ct_eyyjscz2016j_eyyjsccloze_0121_201611[/img]Modernsocietye
随机试题
GreenhouseEffectI.【T1】_____ofthegreenhou
WhereisMrs.Bushvisitingnow?[br][originaltext]UnitedStatesFirstLad
[originaltext]W:I’dliketo(8)sendthisparceltoAmerica.M:OK.(8)Pleaseput
明代官府藏书系统包括文渊阁、大本堂、司礼监、国子监、皇史晟等等,其中作为刻书机构
下列工质中Pr数最小的是()。A.空气 B.水 C.变压器油 D.水银
硬脑膜动静脉瘘最主要的临床表现是A、头痛 B、蛛网膜下腔出血 C、癫痫 D
私营经济是指( ) A.以生产资料私有制为基础的经济 B.以生产资枓私人占
强制戒毒所的工作内容不包括( )A.教育、治疗 B.管理、保护 C.组织劳
( )就是银行针对面临的环境和所处的位置,考虑当前客户的需求特点,设计表达银行
关于新诺明叙述错误的是A.磺胺甲噁唑又名新诺明、磺胺甲基异噁唑(SMZ) B.
最新回复
(
0
)