government passed law in July 2010 that requires companies that sell gemstones to determine the origins of their stones.To figure out where gemstones come from, McManus and her team focus a powerful laser on a small sample of the gemstone. The technique is called laser-induced breakdown ...
Semi-precious stones include all other stones considered worthy of use in jewelry. The list of these stones is very long; suffice it to say that there are several hundred such stones, though most people are aware of only a couple of dozen of their names, and few people can readily recogni...
a jewel; a gem.diamonds, emeralds and other precious stones.piedra preciosa precious few/little very few/little.I've precious little money left.muy poco Kernerman English Multilingual Dictionary © 2006-2013 K Dictionaries Ltd. Want to thank TFD for its existence?Tell a friend about us, add...
2.细节题:从文章第三段的句子:In an effort to reduce the trade in blood minerals, the U.S. government passed law in July 2010 that requires companies that sell gemstones to determine the origins of their stones.可知为什么美国政府要求出售宝石的公司确定宝石的来源,是为了减少血矿石的交易。选C ...
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Beads,stones,seashells,paper,preciousmetalssuchasgoldandsilver,basemetalssuchasironhave allbeenusedasmoney.Today,moneyisprintedonpaper.Alotofcountriesusetheirowncurrency,withn amessuchasdollar,pound,franc,ruble,yuanandsoon.Since2002,18oftheEUmembershave replacedtheirnationalcurrenciesbyEuronotesandcoins. If...
For the interpretation of the Greek names used by John, much help is given by Pliny's great work on Natural History, published 77 AD, for it records what was known about precious stones at the very time when John himself was living. The Greek names of stones and their Latin verbal equiv...
Their little foundation will not bear the weight of a single human soul, much less the city of God's coming ages of glory.3. The manifoldness and variety of the city's foundations are also set forth graphically in this picture. They are adorned with "all manner" of precious stones. ...
The names precious and semi never caught on like they wanted them to. No one really ever used themexcept for the jewelers. Only now and then do you actually see gems listed as semi-precious or precious inthe sales fliers(that’s more rare than precious stones are).Most won’t even go ...
Beads, stones, seashells, paper, precious metals such as gold and silver, base metals such as iron have all been used as money. Today, money is printed on paper. A lot of countries use their own currency, with n ames such as dollar, pound, franc, ruble, yuan and so on. Since 2002...