对长汀县某农村中学的结核病感染进行调查分析。

A survey on tuberculosis infection in a rural middle school of Changting county was conducted and analysis was carried out.

youdao

对长汀县某农村中学的结核病感染进行调查分析。

A survey on tuberculosis infection in a rural middle school of Changting county was conducted and analysis was carried out.

youdao