原题
录音 1
What does the speaker say is a potential drawback to nanotechnology?
AThe high cost of manufacturing using nanomaterials
BThe inherent difficulty in working with material that is so small
CThe ease with which nanoparticles can enter biological systems
DThe health risks associated with working with nanotechnology
正确答案：C
解题思路
老师暂未填写解题思路。