某学习小组准备探究气体的测定和数据处理方法。

【提出问题】利用碳酸钙与稀盐酸反应来测定生成CO₂的量。

【实验设计】通过下列两个实验分别测定CO₂的质量和体积。

实验一                                实验二

以摔跤为传统体育运动项目的民族是（   ）

    My name is Bill. I'm from England. I am a worker. I work in a clothes shop. My wife , Ann, is a teacher. She teaches English in a junior high school. We have two kids: a son and a daughter. They are students. Jim is our son. Now he is in his favorite T-shirt and blue pants. Sally is our daughter. She likes blue very much. Now she is in her blue dress. My father's name is Robby. My mother's name is Diana. They are old and they don't work now. I have a brother. His name is Robert. He is a worker, too. My wife's father is Sam. Her mother's name is Rose. Her sister is Lily. She is a teacher, too.