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黄金,自古以来就是荣华富贵的象征。它有光辉的外表,优良的性质,不仅深受人们的喜爱,而且还是国际公认的硬通货。人们爱说:“真金不怕火炼”。原因是,金的熔点很高,在1063℃的环境中才能熔化;金的比重较大,1立方米重达19.3吨。金,“洁身自好”,从来不愿和氧结合,所以化学性质稳定,在高温中也不会生锈。金,“性格温柔”,富有延展能力,绿豆大的一粒黄金,竟可抽成25000米长的细
Gold has been a symbol of prosperity and wealth since ancient times. It has a gorgeous appearance, excellent quality, not only by the people’s favorite, but also internationally accepted hard currency. People love to say: “real gold is not afraid of fire.” The reason is that the melting point of gold is very high, melting in the environment of 1063 ℃; a larger proportion of gold, weighing 19.3 tons of 1 cubic meter. Gold, “clean self”, never combined with oxygen, so chemically stable, will not rust in high temperatures. Gold, “gentle personality”, rich in scalability, a large gold mung bean, can actually pumping into 25,000 meters long thin