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 tends to make up the majority of Earth’s oceans by mass. A drinking water molecule (H2O) is produced up of two hydrogen atoms and just one oxygen atom. Though there are actually far more hydrogen atoms in h2o, hyd