【听力原文】 Scientists in Brazil claim they‟ve come up with a new way of treating burns. That is, with frog skin. Researchers say it‟s cheap and effective. The frog skin has components that diminish the growth of bacteria, making the wound heal faster and reducing the amount of time that the patient has to stay in hospital. Researchers say the method has already been successfully used in some hospitals in Brazil.

【解析】 对话开头便提到了， 巴西的科学家提出了新的治疗烧伤的方法， 就是使用青蛙皮。 后文都是对使用青蛙皮治疗的优点的描述。 故正确答案为D。