Systematic community investigation into street trees in Shenyang was carried out using typical sampling method.
采取典型抽样的方法对沈阳市行道树进行了全面的群落调查。
Methods A typical sampling method was used to perform the questionnaire study among local inhabitants and pupils.
现场问卷调查居民和小学生疟疾防治知识知晓率及对疟疾防治的需求。
This paper USES the typical sampling method, selection of Nanning city block 14 has the representative city overpass bridge as the research object.
本文主要采用典型抽样法，选取南宁市14座具有代表性的城市立交桥作为重点研究对象。
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