题目

阅读理解The summer before my senioryear of high school, I was eating in a cafeteria with some other high school students,and one girl asked me, Do you live in a teepee(圆锥形帐篷)? It was such a silly question that, at first, I thought she wasjoking! I said, Are you serious? She said, Oh, wait, I'm sorry.Is that something I shouldn't ask? She wasn't trying to be rude, so it didn'tbother me. I just said, No, I have a house with electricity and running water.I'm not disconnected from the world! But the truth is, I did grow up differently.I'm a Native American,and I'm from a reservation 海洋浮游植物通过光合作用与呼吸作用能够对大气中CO2进行调节，有人称之为海洋“生物泵”作用。该作用可能（）A．加快洋流流速B．缩小臭氧层空洞C．减轻酸雨污染D．缓解全球变暖