根据短文理解, 从A、B、C、D四个选项中选择最佳答案填空。

     Many years ago there lived two brothers in London. They were both very rich. They had 1 ideas about money. They were quarrelling about what would happen if a poor fellow could 2 a million pound note(钞票). One thought that anyone with such a note would have whatever he wanted; the other thought that it would be 3 for him to get anything with the note. They couldn't agree with each other. So they 4 to make a bet(打赌).

    It happened that a young man named Henry was wandering through the street that day, who had come to Britain only by chance. Without home and job, he looked 5 and hungry. Suddenly he saw an apple 6 away by a child. The man was so hungry that he was thinking of 7 it up to eat. Just as he was reaching out his hand, he heard a 8 calling him. He looked up and saw the two 9. They gave him an envelope. They told him not to open it until two o'clock. They said. ‘'Nothing but 10 in it.” Then they left.

今有一混合物的水溶液，只可能含有以下离子中的若干种：Na⁺、NH₄⁺、Ba²⁺、Cl^﹣、CO₃^2﹣、SO₄^2﹣．现取两份200mL溶液进行如下实验：①第一份加足量NaOH溶液，加热，有气体产生；②第二份加足量BaCl₂溶液后，得干燥沉淀，经足量盐酸洗涤、干燥后，沉淀质量减轻．根据上述实验，以下推测正确的是（　　）

往一个底面半径是3分米，高是4分米的圆柱形容器中注满水，再竖直轻轻插入一根底面积是3dm²，高是2分米的圆柱形钢材（水没过钢材），溢出水的体积是（　　）毫升．