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【单选题】Throughout history, gold has been a precious material, eagerly sought and cherisheD、It was probably the first metal to be mined because it is beautiful and imperishable (which will always exist or cannot wear out), and because beautiful objects can be made from it-even with primitive tools. The amount of gold known to ancient peoples probably totaled not much more than the amount produced each year by the world’’s largest gold mine located in the Witwatersrand district of SouthAfric
A、Stores of gold discovered by archaeologists in Greece, Scythia, andEgypt, as well as the gold from Indian treasuries in Mexico and Peru, represented years of patient collection of small quantities from streams and veins (矿脉) , often by slave labor.　　The essential value of gold has always been known, even before gold was used in coinage. It remains the only universally recognized standard of value in international monetary exchange. Most of the world’’s refined gold is absorbed by governments and central banks to provide backing for paper currency.But the amount of gold used in arts and in industry is increasing. In addition to its use for jewelry, decorative finishes, and dentistry, its special properties have led to many applications in modern science and technology. Surface coatings of gold protect earth satellites from heat and corrosion, and certain electrical components and circuits of spacecraft are made of gold when extreme reliability is requireD、　　Gold was first produced in the United States from the southernAppalachian region, beginning about 1792. These deposits, though rich, were relatively small and were quickly depleteD、The discovery of gold at Sutter’’s Mill inCalifornia sparked the gold rush of 1849-50. Hundreds of mining camps sprang to life as new deposits were discovereD、As a result, the production of gold increased rapidly.　　During World War I and for some years thereafter, annual production declined to about two million ounces. When the price of gold was raised in 1934 to $35 an ounce, production increased rapidly. Shortly after the start of World WarⅡ, gold mines were closed and the government did not permit them to reopen until 1945. Since then the production of gold has not exceeded two million ounces a year.　　The largest producing gold mine in the United States is the Homestake Mine in SouthDakota, which yields about 575,000 ounces of gold each year. Other mines scattered throughout various parts of the world produce even larger amounts of this highly prized and eagerly sought yellowish material. The author suggests that
A、 the U.S. is the largest producer of gold in the worlD、
B． ancient peoples collected gold in considerable amounts.

C、 gold was first mined in the U.S. in the mid-1700s.
D． governments keep the production of gold under control.

网考网参考答案：D
网考网解析：
题干中的suggests意为give signs of(显示，暗示)，相当于implies，指未明说，但可推断的内容。D项内容可从第2段第3句和第4段第3句找到依据，为正确选项。 A和B项与第1段的内容不符；C项与第3段第1句的年代不合，皆不可取 document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>