【简答题】Rising levels of carbon dioxide in the atmosphere are a major cause of climate change, and now a new study has confirmed that atmospheric CO 2 is also affecting the ocean chemistry and potentially har...
【简答题】A: Well, I’m afraid . I must be going now. B : Really? But it’s still early. A : Yes, but I . I have to go to the store before it closes. B : Well, then I won’t keep you any longer. A : Good-bye, and ...