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field trial
释义
field trial
Encyclopedia
医学
现场试验
释
field trial
现场试验
在社区的现场条件下,以尚未患某病的人作为研究对象,按随机分配原则将研究对象分为实验组和对照组,实验组给予某种干预措施(研究因素),对照组不给予干预措施或给予安慰剂,比较两组结局的方法。又称人群预防试验。
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blow up of solution
blow-up of solution
blow up rate
blow-up rate
blowup ring
blow up set
blow-up set
blow up time
blow-up time
BLP model
BLP模型
BLR
BLRG
BLS
BLUE
blue
blue agriculture
Blue and John Crow Mountains
blue and white fish and glaze pattern plate
blue and white glazed Avalokitesvara porcelain jar with plum patterns
blue-and-white jar with story
blue-and-white meiping with motif of figures appreciating the four flowers orchild,louts,chrysanthemum and prunus
blue and white porcelain
blue-and-white porcelain of the Yuan dynasty
blue and white porcelain pot with openwork four season sights involving red mountains and flowers
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更新时间:2026/7/4 20:46:29