有任何疑问或需要帮助，请通过邮件或社交平台联系我们。您的反馈是我们改进的重要动力。 Quickly ahead — way ahead. The first inkling people had on the existence of oxygen as a component was in 1608, when Dutch inventor Cornelius Drebbel described which the heating of saltpeter (potassium nitrate) released a fuel, in accordance with the Royal Modern society of Chemistry (RSC). The id https://garrisonu704njl8.sasugawiki.com/user