为了对战后的世界作出安排，战胜的协约国在巴黎召开了会议，会议决定在战后成立联合国来维护世界的和平。 [ ]
×
—Is that computer engineer James King?
—It _____ him. I'm not quite sure.
A. must be
B. maybe
C. may be
D. should be
直流工作方式有哪几种？
