题目

After the first World War, a small group of veterans (老兵) returned to their village in Britain. Most of them managed to get along fairly well, but one—Francis Blustering, who had been wounded and who never recovered his strength— was unable to work like others. In time he became very poor. Yet he was too proud to accept anything from the people in the village.        Once, these veterans held a reunion dinner in the home of Jules Grandin, who had made a good deal of money. Grandin produced a curiosity（珍玩）—a large old gold coin. Each man examined it with interest 下列现象中，属于与温度变化相适应的现象是（ ）A．蛾类夜间活动B．仙人掌的叶变成刺C．候鸟的迁徙D．山顶的旗形树