Some experts think that language learning is much ___ for children as their tongues are more flexible.

A．easy

B．easier

C．easily

D．more easily

为“歌手”表增加一个字段“最后得分”的SQL语句是( )。

A) ALTERTABLE歌手ADD最后得分F(6，2)
B) ALTERDBF歌手ADD最后得分F6，2
C) CHANGE TABLE歌手ADD最后得分F(6，2)
D) CHANGETABLE歌手INSERT最后得分F6，2