小敏、小刚、小明是同班同学。小敏喜欢通过阅读来学习，小刚觉得听别人讲更容易学到知识，而小明觉得自己动手的事情更容易记住。这说明（  ）

右图为人体某结构内的血管和血液流动方向及气体进出血液的示意图。若b为肺泡外毛细血管，则a内流动的是____ 血，c内流动的是____ 血，e为____ 气体，f为____ 气体

    It's a fine day. The Black（布莱克一家）are busy today. Tony and Gogo are going to the beach. Jenny is going to the park with her friends. Mrs. Black is going to the shopping mall. She is going to buy some milk and vegetables. Is Mr. Black going to the shopping mall, too? No, he isn't. He's going to stay at home. Look! He is reading the newspapers（报纸）.