21. If silver nitrate is converted into silver nanoparticles, the most possible process for such a conversion is?
(A) Exposure to oxygen
(B) Exposure to heat
(C) Exposure to water
(D) Exposure to alcohol compound
(E) Exposure to acid compound.
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統計: A(4), B(0), C(3), D(13), E(9) #2053818
統計: A(4), B(0), C(3), D(13), E(9) #2053818