(20) When did the speaker start experimenting with 3D printing？
A、Whenshehadjustgraduatedfromhercollege.
B、WhensheattendedaconferenceinNewYork.
C、Whenshewasstudyingatafashiondesignschool.
D、Whensheattendedafashionshowninemonthsago.
发布时间：2024-09-11 23:28:42
