欲测定Cu﹣Zn合金及Cu﹣Ag合金中铜的质量分数，实验室只提供一瓶未标明质量分数的稀硫酸和必要的仪器．

美国记者斯诺《西行漫记》中对我国某地形区有一段描述“有的山丘像巨大的城堡，有的像成队的猛玛，有的像滚圆的大馒头，有的像被巨手撕裂的岗峦，上面还留着粗暴的指痕……”。读图回答下列问题。

    Hello! My name is Kim. I'm from the U. S. I am a tall girl. I like basketball best. I often play basketball with my friends on the playground. We have two teams—the White Team and the Yellow Team. I am on the Yellow Team. Each team has five players. My favourite basketball player is Yao Ming. I like him best and I want to be a basketball player like him.