gunpowder

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gunpowder

1.The Chinese Four Great Inventions （paper making， printing， gunpowder and compass） as well as the skills of silkworm breeding and2.Since niter， the major raw material of the gunpowder， is as white as snow， Arabians called the gunpowder（）and（）.3.The four great inventions in ancient China are compass, gunpowder, papermaking and printing.4.Since niter, the major raw material of the gunpowder, is as white as snow, Arabians called the gunpowder _____ and ______ .