火药是由硫 、 碳和硝酸钾组成.Gunpowder is composed of sulfur, carbon, and potassium nitrate.氨对硝酸钾的选择分离结晶效果较好.And ammonia had effective selectivity for the separation of potassium nitrate.用氯化钾与硝酸铵为原料,采用复分解法生产农用硝酸钾与氯化铵.Agricultural pot...
你叫我‘前辈 ’, 我已经觉得像史前原人的遗骸了." When you call me'senior ', I feel like a prehistoric relic.匈奴地区的中原人有人身自由.The Zhongyuan people in Hsiungnu area were free.通过收集果实, 蔬菜和肉类恢复的PC原人的生命值.Through the collection of fruits, veg...