第71題： Many Chinese museums and art galleries rolled out online exhibitions，courses and other online services，allowing netizens to take virtual tours and enjoy splendid art feasts online. Which one is not the technology support to this service（）。
A．5G
B．Virtual rreality （VR）
C．Ultrahigh definition video
D．Block chain
答案解析與討論：m.nwblx.com/st/5382411100.html

第72題： （）is not the application scenario of artificial intelligence.
A．autonomous robot
B．face recognition
C．self-driving
D．conditioned reflex
答案解析與討論：m.nwblx.com/st/5382518863.html

第73題： This （）is the work defined at the lowest level of the WBS for which cost and duration can be estimated and managed.
A．activity
B．planning package
C．work package
D．requirement
答案解析與討論：m.nwblx.com/st/5382611557.html

第75題： The（） phase is where the team members meet and learn about the project and their formal roles and responsibilities.
A．norming
B．storming
C．forming
D．performing
答案解析與討論：m.nwblx.com/st/5382816222.html