常見例句雙語例句Excuse me. How to get to Beihu Park from The Fourth Middle School?請問從四中到北湖公園怎麼走？Methods Stratified random cluster sampling was used, 9 township hospitals were randomly selected from Beihu District, Suxian District and Guiyang County of Chenzhou.方法採用分層整群隨機(jī)抽樣的方法，在郴州市隨機(jī)抽取北湖區(qū)、囌仙區(qū)和桂陽縣的9所鄕鎮(zhèn)衛(wèi)生院作爲(wèi)調(diào)查現(xiàn)場。 返回 beihu