样本量极小，不过这节groupwork占大头的课我最终因为看到组员有个德国交换生而没有退，目前观察下来果然他更靠谱（
今天组会我：我这边有点吵他：我这边也是，有人在弹琴我：？我这边也有人在弹琴最后发现就在楼上楼下
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