When did the ugly Christmas sweater start to appear?
A: in 1950
B: in the 1950s
C: in 1980
D: in the 1980s
A: in 1950
B: in the 1950s
C: in 1980
D: in the 1980s
举一反三
- When was Beijing officially adopted as the capital of PRC? ( ) A: in 1945 B: in 1949 C: in 1950 D: in 1980
- 软件危机出现在（ ） A: 1950～1960 B: 1970～1980 C: 1960～1970 D: 1980～至今
- 互联网商用从哪一年开始? A: 1946 B: 1950 C: 1980 D: 1990
- When did the uproar in Heaven begin? A: In the 1980s B: In the 1970s C: In the 1960s D: In the 1950s
- 我国从（）年开始研制数控机床。 A: 1950 B: 1958 C: 1965 D: 1980