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视频
Unit1-1 Science and Scientists Reading and Thinking
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21:33
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视频
Unit1-2 Science and Scientists Discover Useful Structures
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22:38
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视频
Unit1-3 Science and Scientists Using Language(1)
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21:26
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视频
Unit1-4 Science and Scientists Using Language(2)
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21:24
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视频
Unit1-5 Science and Scientists Listening and Speaking (Workbook)
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23:22
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视频
Unit1-6 Science and Scientists Video Time
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24:32
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视频
Unit2-1 Bridging Cultures Reading and Thinking
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21:48
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视频
Unit2-2 Bridging Cultures Discover Useful Structures
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23:41
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视频
Unit2-3 Bridging Cultures Using Language(1)
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22:52
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视频
Unit2-4 Bridging Cultures Using Language(2)
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21:42
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视频
Unit2-5 Bridging Cultures Listening and Speaking(Workbook)
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23:32
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视频
Unit2-6 Bridging Cultures Video Time
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22:19
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视频
Unit3-1 Food and Culture Reading and Thinking
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24:20
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视频
Unit3-2 Food and Culture Discover Useful Structures
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20:43
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视频
Unit3-3 Food and Culture Using Language(1)
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24:27
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视频
Unit3-4 Food and Culture Using Language(2)
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23:01
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视频
Unit3-5 Food and Culture Listening and Speaking(Workbook)
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20:44
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视频
Unit3-6 Food and Culture Video Time
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23:29
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视频
Unit4-1 Journey across a Vast Land Reading and Thinking
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24:18
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视频
Unit4-2 Journey Across a Vast Land Discover Useful Structures
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22:27
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视频
Unit4-3 Journey across a Vast Land Using Language(1)
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24:19
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视频
Unit4-4 Journey across a Vast Land Using Language(2)
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22:57
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视频
Unit4-5 Journey across a Vast Land Listening and Speaking(Workbook)
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24:10
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视频
Unit4-6 Journey across a Vast Land Video Time
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23:13
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视频
Unit5-1 First Aid Reading and Thinking
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21:09
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视频
Unit5-2 First Aid Discover Useful Structures
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22:05
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视频
Unit5-3 First Aid Using Language(1)
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23:28
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视频
Unit5-4 First Aid Using Language (2)
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23:45
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视频
Unit5-5 First Aid Listening and Speaking(Workbook)
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20:40
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视频
Unit5-6 First Aid Video Time
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20:53