第34题: [单项选择]以同年年平均人口作分母的相对数有 A. 某年新生儿死亡率 B. 某年生育率 C. 某年总死亡率 D. 某年婴儿死亡率 E. 某年病死率 参考答案:C 答案解析:总死亡率=某人群某年总死亡人数/该人群同年平均人口数。
第35题: [单项选择]Radiation can hurt us in that it can ______. A. affect the healthy growth of our offspring B. damage cells which may grow into cancer years later C. kill large numbers of cells in main organs so as to cause death immediately D. all of the above 参考答案:D