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
What was the dream of the early miners.-
What was the dream of the early miners.-
admin
2011-03-01
16
问题
What was the dream of the early miners.-
Have you ever played the game of five stones?. To play it you can use any small pebbles which may be lying around, but, for one of your stones, you would certainly not use a Diamond worth hundreds of pounds. Yet this is what the son of a South African farmer did in the year 1866. When he picked up what he thought was a stone, he did not know that he had become the first person to find a diamond in South Africa.
A few years later, thousands of miners were at work there. They rushed from all over the world to seek their fortunes. Most of the miners dreamed of finding one of the large stones, perhaps one like the famous Cullinan Diamond, which was found in 1905 and was as big as a man’s fist. This great stone was cut into several small gems, some of which can now be seen amongst the Crown Jewels in the Tower of London.
The modem world, however, has found more important uses for its diamond than the making of jewellery. They have been put to work; for diamond is the hardest mineral foud in our earth. It can cut or polish the hardest steel or grind its way through solid rock. Only a diamond is hard enough to cut another diamond, and it is not the big stones which are needed for the drills, saws and grindingwheels. Only factories now demand the diamond dust which the early miners looked upon as useless.
Yet it is a strange fact that nature makes its hardest mineral from exactly the same sub- stance as one of its softest. This soft mineral is graphite, which is very easily broken up and is used to make the "lead" in your pencil. The name "lead" should not really be used, because graphite consists of nothing but carbon—just the same as a diamond.
选项
A、Diamond.
B、Carbon.
C、Lead.
D、Graphite.
答案
D
解析
本题的关键词为graphite,is used to make the“lead”in your pencil.根据关键句可推断出。可能有学生会选[B],因为graphite consists of carbon.但carbon只是一种元素,而不是一种矿物质或金属。
转载请注明原文地址:https://kaotiyun.com/show/KUkd777K
本试题收录于:
公共英语三级笔试题库公共英语(PETS)分类
0
公共英语三级笔试
公共英语(PETS)
相关试题推荐
Whydidmanhavetotrackhistargetatacloserangewhenusingashortbow?
Readthefollowingarticleinwhichfivepeopletalkabouttheirtimearrangement.Forquestions61-65,matchthenameofeachp
Readinginvolveslookingatgraphicsymbolsandformulatingmentallythesoundsandideastheyrepresent.Conceptsofreadingha
Onwhatdayoftheweekwillthemagazinearrive?
Whereisthisconversationprobablytakingplace?
Inrecentyearsscientistshavefoundthatthelaserhasawidevarietyofapplications,makingitoneofthemostimportantinv
Whenmyfatherwasgettingreadyforwork,our【C1】______wasruledbyknocksandwords.One【C2】______onthetablemeant"Iamr
Christeacheschildrentheguitar______.
Asmileisastrongsignofafriendlyandopenattitudeandawillingnesstocommunicate.Itisapositive,silentsignsentwi
YourfriendLiMinghaswrittentoinviteyoutogotohishometowntogetherwithhimandyouarewillingtoaccepthisinvitati
随机试题
抵押是指债务人或者第三人将其动产移交债权人占有并以该动产作为债权担保。()
法国教育家拉夏洛泰在1763年出版了他的教育代表作《________》。
______theplancarefully,herejectedit.
与正常生殖功能相关的脏器是()
下列关于企业年金的资金筹集的说法错误的是( )。
法院或者仲裁机构确认合同无效,应当以全国人大及其常务委员会制定的法律和( )为依据。
中国公民王某2015年10月的收入情况如下:(1)取得工薪收入10000元。(2)将自编剧本手稿原件公开拍卖取得所得10000元。(3)当月取得上市公司股息所得2000元。(4)将自用住房一套转让,取得转让收入200万元,支付转让税费5万元,该套住
下列关于投资项目资本成本的说法中,正确的有()。
一次你抓捕一名小偷,他跑上了顶楼,并威胁说:若你再追他,他就跳楼,面对此情况,你怎么处理?
Whatdowemeanbyasatisfactorystandardofliving?Obviously,itmustincludethebasicnecessitiesoflifesuchasfood,clo
最新回复
(
0
)