软件危机出现在（ ） A: 1950～1960 B: 1970～1980 C: 1960～1970 D: 1980～至今

【单选题】我国是哪年哪月哪日发射首颗卫星? A. 1970年5月24日 B. 1970/4/21 C. 1970/3/24 D. 1970/4/24 E. 1970/4/28

All of the following statements are true EXCEPT ____. A: young people couldn't afford their own tuition in the 1970's B: it's difficult for graduates from colleges to find a job in the 1970's C: fewer parents could afford to send their children to college because of the recession in 1970's D: Birthrate dropped in the 1970's because of the recession

My mother was born _________ . A: in the 1970s B: in the 1970 C: in 1970s

发育生物学作为一门学科，是在下列哪个年代创立的（）。 A: 1950～1960 B: 1960～1970 C: 1970～1980 D: 1980～1990

以集成电路为基本元件的第三代计算机出现的时间为（ ）。 A: 1965—1970 B: 1964—1975 C: 1960—1969 D: 1950—1970

He left home on 1970 and____heard of since.

德国拜耳公司在1970

______ in the 1970’s that you started to learn Russian?

184.一My father was born .When he was ,he went abroad. A: in 1970；in his thirty B: in the 1970s；in his thirties C: in the 1970；in his thirty D: in 1970s；in his thirties