randomly_divided_into_two_groups

1.Methods 67 RH patients were randomly divided into two groups.
方法将67例肾性高血压患者随机分为两组。
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2.Before the trip the boys were randomly divided into two groups.
在这个旅行之前孩子们被随机分为两组。
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3.When they entered the study, they were randomly divided into two groups.
他们刚加入研究时，被随机分成两组。
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