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
2024-01-02
52
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:https://tihaiku.com/zcyy/3328138.html
相关试题推荐
THEILLUSIONOFFILM1Filmisanillusionbecausethemovingpictu
THEILLUSIONOFFILM1Filmisanillusionbecausethemovingpictu
THEILLUSIONOFFILM1Filmisanillusionbecausethemovingpictu
THEILLUSIONOFFILM1Filmisanillusionbecausethemovingpictu
THEILLUSIONOFFILM1Filmisanillusionbecausethemovingpictu
THEILLUSIONOFFILM1Filmisanillusionbecausethemovingpictu
Thecurrentconcentrationofcarbondioxideintheatmosphereisabout360p
Thecurrentconcentrationofcarbondioxideintheatmosphereisabout360p
Peopleworkbecausetheyneedmoneytolive.Whataresomeotherreasonstha
______crudehydrocarbonsintosuchproductsasgasolineandpetrochemicalsisat
随机试题
NarratorListentopartofaconversationbetweentwostudents.Now
SigmundFreudIfthereisasinglenameinallpsy
TheArmadillo(犰狳)isaverydifferentcreature.Ithastremendousclaws,bu
Anorganization’sreputation,profitability,andevenitscontinuedexistenc
在隧道照明中,()是最重要的技术指标。A:路面照明 B:路面亮度 C:炫光
拱圈和出入口拱上端墙的施工,应()进行。A.由中间向两侧同时对称 B.由两侧
左边给定的是纸盒的外表面,下列哪一项能由它折叠而成?
证券公司在取得公司登记机关颁发或者换发的证券公司或者境内分支机构的营业执照后,应
土壤环境质量评价指标主要包括()。A:土壤资源评价指标 B:化学指标 C:
下列选项中,不属于土地增值税纳税义务人的是( )。A.转让国有土地使用权的外商投
最新回复
(
0
)