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 also would make up almost all of Earth’s oceans by mass. A water molecule (H2O) is manufactured up of two hydrogen atoms and 1 oxygen atom. Despite the fact that you can find far more hydrogen atoms in drinking water, hydrogen has much less mass. By mass, drinking https://tariqy160kam0.blogrelation.com/profile