第13题: [简答题]What kind of disease will harmful gases and terrible noise caused by vehicles bring to the city people 参考答案: 答案解析:diseases in hearing and in breathing system。
只有第二段的最后提到了有关疾病的问题,所以可以参考第二段最后一句。
第19题: [单项选择]A. To discover the side effects of thermographs. B. To improve the analysis of blood and tissue samples. C. To find out why a body requires rest. D. To get a better understanding of illness. 参考答案:D 答案解析:[听力原文] Why are scientists studying variations in body temperature