5. Плоские черви (7 класс)
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![[Кафедра общей физики МФТИ] Лекция №5 “Тяготение“ (Попов П.В.)](https://sun9-80.userapi.com/impg/cO8ByeNn0rHi0fnUZN6JQBSNdnxXGg9nMbjahA/J7z3AYg9o_s.jpg?size=320x240&quality=95&keep_aspect_ratio=1&background=000000&sign=6d65362bb995995b716073ae0d64ac42&c_uniq_tag=vP2INTP8S4dkVp0jYRFG1Zr-VARBd9u74wXKtZ2tv28&type=video_thumb)
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