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"Diamonds", sang Marilyn Monroe in the film Gentlemen Prefer Blondes, "are
"Diamonds", sang Marilyn Monroe in the film Gentlemen Prefer Blondes, "are
游客
2024-08-13
26
管理
问题
"Diamonds", sang Marilyn Monroe in the film Gentlemen Prefer Blondes, "are a girl’ s best friend." You might not agree, but you can be sure that diamonds are not only【D1】_______ in the world, they are also the most expensive.A single diamond sold for $16.5 million at an【D2】_______ in Geneva in 1995!
Diamonds are found in a number of countries including Australia, South Africa, Brazil and the Russian Federation.In fact, there are two main types of diamonds.These are colourless diamonds (about 25% of those found), which have only a few【D3】_______ and are usually made into jewellery, and black diamonds—the remaining 75%—which contain a lot of impurities, and are used in industrial【D4】_______Industrial diamonds are also produced artificially.
The largest diamond ever found is the Cullinan diamond.It weighed 620 grams and was found in a South African diamond mine in 1905.It was bought by the Transvaal Government for £50,000, and then presented to the King of England, Edward VII.The diamond was then【D5】________smaller jewels, which are now part of the British crown jewels.These jewels belong to the British government and are kept in the Tower of London. [br] 【D3】
"Diamonds", sang Marilyn Monroe in the film Gentlemen Prefer Blondes, "are a girl’ s best friend." You might not agree, but you can be sure that diamonds are not only
the hardest substance
in the world, they are also the most expensive.A single diamond sold for $16.5 million at an
auction
in Geneva in 1995!
Diamonds are found in a number of countries including Australia, South Africa, Brazil and the Russian Federation.In fact, there are two main types of diamonds.These are colourless diamonds (about 25% of those found), which have only a few
impurities
and are usually made into jewellery, and black diamonds—the remaining 75%—which contain a lot of impurities, and are used in industrial
applications
.Industrial diamonds arc also produced artificially.
The largest diamond ever found is the Cullinan diamond.It weighed 620 grams and was found in a South African diamond mine in 1905.It was bought by the Transvaal Government for £150,000, and then presented to the King of England, Edward VII.The diamond was then
cut into
nine smaller jewels, which are now part of the British crown jewels.These jewels belong to the British government and are kept in the Tower of London.
选项
答案
impurities
解析
听力材料中提到“These are colourless diamnonds (about 25% of those found), which have only a few impurities and are ually made into jewellery,and black diamonds—the remaining 75%—which contain a lot of impurities , and are used in industrial applications.”,即这些是无色的钻石(大约占被发现的25%),它们仅含有几种杂质,通常被制成珠宝,和黑钻石—占剩下的75%—它们包含许多的杂质并被用于工业用途,故本空应填impurities。
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