单选题:学生们只在空间和时间上结成群体,但成员间尚无共同活动的目的和内容的群体是(  )

题目内容:
学生们只在空间和时间上结成群体,但成员间尚无共同活动的目的和内容的群体是(  ) A.松散群体
B.联合群体
C.非正式群体
D.集体

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