When did Motorola introduce the first cell phones for commercial use?
A.in the same years when he first made a cell- phone call
B.in 1981
C.in 1983
D.in the same year when AT& T constructed a cell phone system.
A.in the same years when he first made a cell- phone call
B.in 1981
C.in 1983
D.in the same year when AT& T constructed a cell phone system.
Loga
Hóa Học lớp 12
