题目

阅读下面短文，根据所给情节进行续写，使之构成一个完整的故事。 Jack, a clerk at the local bank, was wandering alone on the street. It was a cold, silent winter night. His mind was on his wife Linda, who had been in a car accident two months ago and was now lying in a hospital bed, waiting for more money for her operation. Jack had sold everything he had, and he had tried his best to borrow money from all the people and banks he could. But the real world is cruel. A large amount of money was still needed. To Jack, it would mean a great deal of suffering to see his wi实验室里若要制取2.4g氧气做实验，至少需要称取多少g氯酸钾？