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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。Oxygen is considered the most ample component in Earth's crust, creating up Virtually 50 % of your Earth's crust in the form of varied oxides for example drinking water, carbon dioxide, iron oxides and silicates.[six] It is the