学生们分为四组，每组成员各司其职，共同完成学习任务。
Students are divided into four groups, and each group member has different "job".
在网络环境下，小组内学习者之间如何协作共同完成学习任务，即学习者之间交互的模式，是决定CSCL成败的关键所在。
In a network environment, how the co-learners collaborate in the group to complete learning tasks, the Interaction among the learner models is to determine the key to the success of CSCL.
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