The Elemental Substances
The six elemental substances of the organic world are: Carbon,
Hydrogen, Nitrogen, Oxygen, Phosphorus, and Sulphur, which can be
easily remembered by the following: The Organic World--Can Have No
Other Principal Story.
The initials of each of the words following "World" stand for one of
the elements.
Miller's Mind training for children Book 3 (of 3) A practical training for successful living; Educational games that train the senses · 第 103 / 160 题