原题
录音 1
Why does the speaker mention the amount of gold nanoparticles in pink tesserae?
ATo help explain why most of the tesserae were very expensive
BTo help people understand what ancient Roman tesserae looked like
CTo emphasize an effect of heating gold nanoparticles between layers of glass
DTo argue that the Romans knew how to use tiny particles for coloring tesserae
正确答案：D
解题思路
老师暂未填写解题思路。