是1990s还是1990’s

It is not rare in that people in their fifties are going to university for furthereducation.( A: 1990s B: the 1990 C: 1990's D: the 1990s

China’s Singles’ Day began on November 11, 1990 as a day for unmarried or uncoupled people to celebrate their lives.

In Tannen’s research(1990) there are altogether dimensions along which men and women tend to form different interpretive frames.?

原文:Since the 1990's, climate problems ha...取话语优势;三是广泛参与,改造游戏规则。

In , the Chinese government decided the Double Ninth Festival as Senior’s Day. A: 1989 B: 1990 C: 1991 D: 1992

In , the Chinese government decided the Double Ninth Festival as Senior’s Day. A: 1889 B: 1990 C: 1991 D: 1992

‏In , the Chinese government decided the Double Ninth Festival as Senior’s Day. ‍ A: 1989 B: 1990 C: 1991 D: 1992

People's Square has become the political and cultural center in Shanghai since ________. A: 1994 B: 1998 C: 1988 D: 1990

已知a='python', b=1990，在下列哪些语句可得到：'python诞生于1990'？ A: '{0}诞生于{1}'.format(a, b) B: '%s诞生于%d'%(a,b) C: a + '诞生于' + D: str.format('{0}诞生于{1}', a, b)