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: http://files.school-collection.edu.ru/dlrstore/d77b6643-c6e9-477a-8f4a-2a3b63570aef/%5BPH10_06-018%5D_%5BAM_45%5D.swf;
http://files.school-collection.edu.ru/dlrstore/6ed7e38c-4d03-43cd-878e-71be9f13b1d3/%5BPH10_06-019%5D_%5BPD_54%5D.swf;
http://files.school-collection.edu.ru/dlrstore/fada3dea-3cc4-4954-85d6-ffc434c59ee8/%5BPH10_06-019%5D_%5BAM_51%5D.swf;
https://www.youtube.com/watch?v=ilZyCD-QlJg.
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