This kind of fridge was invented ___ Qingdao ___ 2006.
答案是：in
2006年青岛发明了这种冰箱两个空都是in吗This kind of fridge was invented( in )Qingdao ( in )2006
This kind of fridge was invented ___ Qingdao ___ 2006.
This kind of fridge was invented ___ Qingdao ___ 2006.
其他人气：739 ℃时间：2020-01-31 00:19:55
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