【单选题】Who is the narrator?
D.
The name is not mentioned.
【判断题】预防医学其工作模式是“环境- 人群- 健康”。
【判断题】新生儿出生时头围为 34cm,6个月达43cm,1周岁时达46cm。
【单选题】Who is the narrator?
D.
It is not stated in the story.
【简答题】删除表命令是:___________________________________________。
【单选题】Who is the narrator?