首页
登录
职称英语
1 Because a diamond is made of pure carbon, it has an immensely strong crystal s
1 Because a diamond is made of pure carbon, it has an immensely strong crystal s
游客
2025-02-04
32
管理
问题
1 Because a diamond is made of pure carbon, it has an immensely strong crystal structure, making it the hardest of all minerals. Evidence suggests that diamonds were formed deep within the earth, and some stones may be three billion years old. Alluvial diamonds, those recovered from river gravel, can be carried long distances in rough water with other rocks. Diamond-bearing gravel is the result of one of nature’s sorting processes. Many of the diamonds found in gravel are of gem quality because flawed or fractured stones are more likely to be broken up and eroded away.
2 A diamond shines with great luster and fire, properties that are best revealed in the cut known as "brilliant." The brilliant cut dates from the seventeenth century and remains the most popular cut today because it enhances the brilliance of the gem with the least possible sacrifice of weight. It typically has 58 facets, but sometimes up to 104, and resembles two pyramids set base to base.
3 Most natural diamonds are nearly colorless, but truly colorless diamonds are rare. A few stones are found of all colors in the spectrum, and good-quality ones are known as "fancies." Diamonds of exceptional beauty and rarity are highly prized. Some have long, recorded histories, and others have inspired fantastic legends. The deep blue Hope diamond has a reputation for bringing bad luck; however, the sinister stories about it are untrue. At more than 45 carats, the Hope is one of the world’s largest diamonds and is apparently flawless. [br] The word flawless in paragraph 3 is closest in meaning to
选项
A、expensive
B、unlucky
C、colorless
D、perfect
答案
D
解析
Flawless means perfect in this context. Clue: Many of the diamonds found in gravel are of gem quality because flawed or fractured stones are more likely to be broken up and eroded away (paragraph 1). A flaw is a defect or imperfection; the suffix -less means without.
转载请注明原文地址:http://tihaiku.com/zcyy/3942698.html
相关试题推荐
1Becauseadiamondismadeofpurecarbon,ithasanimmenselystrongcrystals
1Becauseadiamondismadeofpurecarbon,ithasanimmenselystrongcrystals
1Becauseadiamondismadeofpurecarbon,ithasanimmenselystrongcrystals
Coalisclassifiedasafossilfuelbecause______ismadefromcompressedplant
Althoughheat,water,orpressureAtheycanaffecttheBformationofacrystal,
Bloodfromtheveins,highincarbondioxidebut______,returnstotherightat
TheroadtestforthefirstFordautomobilehadtoAbeenpostponedBbecausethe
TrenchesintheoceanfloorareofAgreatinterestbecausetheyareBlineswhere
Becausesomuchofcultureislearnedimplicitly,wemaybeunawarethatcertain
Semipreciousstonesare______preciousstonessuchasdiamonds.A、lessvaluableth
随机试题
Onceuponatime,peoplewholivedalonetendedtobethoseoneitherside
Peoplerecognizeadifferencebetweenchildrenandadults.Whatevents(expe
华彦钧的《二泉映月》是一首()A.管乐 B.打击乐 C.弹拨乐 D.弦乐
下列关于霍乱弧菌错误的是A.曾引起7次世界大流行 B.可用活菌悬滴法直接观察其
双涂层构件时,紧固件、连接件热浸镀锌单面平均锌层质量为()。A.120g/m2
下列关于心电图价值的描述,错误的是()A.能反映心功能 B.能确诊心
患者,女性,62岁,风湿性关节炎。行红外线照射治疗时,关节局部皮肤呈均匀的桃红色
左旋多巴治疗震颤麻痹的机制是A.阻断黑质-纹状体通路的多巴胺 B.补充脑中多巴
材料题 某农业企业2015年投资R项目,当时的货币时间价值为15%,该企业要求
(2021年真题)根据《中华人民共和国海洋环境保护法》,关于防止海水养殖造成海洋
最新回复
(
0
)