About _______ of the students in our class were born in the _______.
A:two-fifths; 1990s
B:two-fifths; 1990
C:two-fifth; 1990s
D:two-fifth; 1990
①“东方红1号”卫星的发射成功
②“神舟”系列载人飞船的发射与回收
③第一颗原子弹爆炸成功
④“嫦娥二号”发射成功
世界各大洲中,人口自然增长率最高的是
你还学过杜甫的哪些诗?把你认为很有名的句子写出至少四句来。