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Metals, Non-metals, and Metalloids
yes, focal lens length has three classifications
the three classification of technology is: tools product process
I hope this is what you mean by three landscapes:* http://www.chinaodysseytours.com/virtual-tour-of-landscape-in-china.html
spiral galaxies (ours), irregular galaxies, and elliptical galaxies.
pure substance
cd
three
Metals, non-metals, and metalloids
pure substance
Terrestrial and gaseous..
pure substance