—John has spoken Japanese well now.
—______, and _____.
A:So he has , so you have
B:So he has , so have you
C:So has he, so have you
D:So has he, so you have.
分式x-2x-12、2x-3x-13、5x-1的最简公分母是( )
下图为“甲、乙、丙、丁四国人口自然增长率的变化示意图”,读图回答。
以下内容的描述与世界第一次世界大战不符合的是( )