When does a baby begin to use more vowels and consonants?A.When he is pleased.B.As he grow

外语类 成人英语三级 已帮助 人

When does a baby begin to use more vowels and consonants?

A.When he is pleased.

B.As he grows.

C.When he gets angry.

D.When he hears other baby crying.

请帮忙给出正确答案和分析,谢谢!

热搜:a是b的充分条件,b是a的必要条件吗