鲁中南及鲁东地区是山东省叶蜂的两个分布中心。
Central-south and East of Shandong are the two distribution centers of sawflies in the Province.
目的了解流行于山东省境内艾滋病病毒（HIV 1）毒株的亚型及各种亚型的分布特点。
Objective To study the distribution of human immunodeficiency virus-1(HIV-1) strains subtypes in Shandong province and to study their source in order to predict the epidemic trend.
目的了解山东省氟中毒病区水氟分布和改水降氟工程现状。
Objective To investigate the distribution of water fluoride and the present status of water-improving defluoridation projects in the endemic fluorosis areas in Shandong Province.
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