北京环路立交桥 Interchanges along ring roads of Beijing

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本系列目前包含了北京二环（33座），三环（49座）和四环（68座）总共150座立交桥，将来还会增添五环及六环。

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Quiz	# Taken	Best
北京市二环路立交 Interchanges along the 2nd ring of Beijing	38	-
北京市三环路立交 Interchanges along the 3rd ring of Beijing	22	-
北京市四环路立交 Interchanges along the 4th ring of Beijing	30	-

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