00:44:09

Unit 2 Saving the Earth Topic 1 Pollution has caused too many problems._第一课时_唐老师_三等奖

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00:47:02

Unit 2 Saving the Earth Section A_第一课时_谷老师_三等奖

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00:43:17

Unit 2 Saving the Earth Topic 1 Pollution has caused too many problems._第一课时_刘老师_三等奖

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00:42:10

Unit 2 Saving the Earth Topic 1 Pollution has caused too many problems._第四课时_陈老师_三等奖

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00:40:38

Unit 2 Saving the Earth Topic 1 Pollution has caused too many problems._第一课时_刘老师_三等奖

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00:17:32

Unit 2 Saving the Earth Topic 1 Pollution has caused too many problems._第一课时_肖老师_三等奖

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00:14:55

Unit 2 Saving the Earth Topic 1 Pollution has caused too many problems._第一课时_稂老师_三等奖

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00:14:57

Unit 2 Saving the Earth Topic 1 Pollution has caused too many problems._第一课时_刘老师_二等奖

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00:43:52

Unit 2 Saving the Earth_Topic 1 Pollution has caused too many problems._Section D_曾老师_二等奖

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00:35:01

Unit 2 Saving the Earth_Topic 1 Pollution has caused too many problems._Section C_丁老师_第一课时_二等奖

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00:38:37

Unit 2 Saving the Earth_Topic 1 Pollution has caused too many problems._Section B_李老师_第一课时_二等奖

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00:45:00

Unit 2 Saving the Earth_Topic 1 Pollution has caused too many problems._孙老师_第一课时_三等奖

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00:43:44

Unit 2 Saving the Earth_Topic 1 Pollution has caused too many problems._Section A_王老师_第一课时

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00:34:13

Unit 2 Saving the Earth_Topic 1 Pollution has caused too many problems._Section A_马老师_第一课时

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00:28:33

Unit 2 Saving the Earth_Topic 1 Pollution has caused too many problems._Section C_李老师_第一课时

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00:45:45

Unit 2 Saving the Earth_Topic 1 Pollution has caused too many problems._Section C_孙老师_第一课时

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00:40:45

Unit 2 Saving the Earth_Topic 1 Pollution has caused too many problems._Section D_杜老师_第三课时

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00:44:33

Unit 2 Saving the Earth_Topic 1 Pollution has caused too many problems._Section D_田老师_第一课时

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00:40:47

Unit 2 Saving the Earth_Topic 1 Pollution has caused too many problems._Section A_李老师_第二课时

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00:33:21

Unit 2 Saving the Earth_Topic 1 Pollution has caused too many problems._Section B_段老师_第一课时

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00:30:27

Unit 2 Saving the Earth_Topic 1 Pollution has caused too many problems._Section B_牛老师_第一课时

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00:47:29

Unit 2 Saving the Earth_Topic 1 Pollution has caused too many problems._刘老师_第一课时

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00:31:14

Unit 2 Saving the Earth_Topic 1 Pollution has caused too many problems._耿老师_第一课时

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