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KENNY L LEARNING
第一节课
温馨提示：所有文件都可以在线观看，用电脑看质量更好！
1 Chemical reactions and equations ppt - pic - part 1.pptx
科学-U1-P1
1 Chemical reactions and equations ppt - pic - part 2.pptx
科学-U1-P2
2 Acids, Bases and Salts - pic ppt - part 1.pptx
科学-U2-P1
2 Acids, Bases and Salts - pic ppt part 2.pptx
科学-U2-P2
实验视频，供参考
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