As a group, the top 50 sites placed 3, 180 tracking files in total on the Journal's test computer.
整体而言，50大站点在日报测试机上共计放置了3180个追踪文件。
Methods: A total of 60 cases with severe organophosphate poisoning were divided into test and control group randomly 30 cases of each group.
将60例重度有机磷农药中毒病人随机分为观察组和对照组，各30例。
Methods:A total of 280 lung cancer patients were divided into test and control group according to their admission time.
将280例肺癌病人按入院时间分为对照组和观察组。
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