常見例句雙語例句Excuse me. How to get to Beihu Park from The Fourth Middle School?請(qǐng)問從四中到北湖公園怎么走？Methods Stratified random cluster sampling was used, 9 township hospitals were randomly selected from Beihu District, Suxian District and Guiyang County of Chenzhou.方法采用分層整群隨機(jī)抽樣的方法，在郴州市隨機(jī)抽取北湖區(qū)、蘇仙區(qū)和桂陽縣的9所鄉(xiāng)鎮(zhèn)衛(wèi)生院作為調(diào)查現(xiàn)場(chǎng)。 返回 beihu