Golikova Irina Viktorovchemistry teacher MBOU "Sergeevskaya secondary school" {module Yandex } Answers:...
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Riddles Mysteries about chemistry
First syllable - well-known preposition, Second syllable is more difficult to find: Part...
0 4k 0November 14, 2009 -
Riddles Collection of riddles about chemistry
Gromova Nelly Anatolyevna, chemistry and biology teacher, secondary school No. 32, Ussuriysk...
0 4k 0October 14, 2009