题目

Mrs. Jones was my first patient when I started medical school—and I owe her a lot.She was under my care for the first two years of my medical training, yet I knew very little about her, except that she was thin, perhaps in her mid 70s. It might seem rather negligent not to know the basic facts of my patient, but I had a valid reason—Mrs. Jones was dead, and had been dead for about three years before I made a patient of her. Mrs. Jones was the dead body that I dissected（解剖）over the first two years of my medical training.Of course, her name wasn’t really Mrs. Jones, but it seemed a古诗词是古人为我们留下的宝贵精神财富。下列诗句中只涉及物理变化的是(     )A．春蚕到死丝方尽，蜡炬成灰泪始干　　B．野火烧不尽，春风吹又生 C．爆竹声中一岁除，春风送暖人屠苏针 　D．只要功夫深，铁杵磨成针