单项选择题

Before a baby babbles his first "Ma" or "Papa", ______.

A．he must be exposed to the language
B．his mind must have some input of sounds and words
C．he learns a lot of utterances
D．his mind is busy sorting out the sounds and shapes of words

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热门试题

单项选择题

The research of Jusczyk and collaborators around the world discovers that ______.

A．babies begin to learn language while in the womb
B．babies learn language at different stages while in the womb
C．babies develop several stages of language learning while in the womb
D．babies have learned a lot about language while in the womb

单项选择题

In the third paragraph, a crow is mentioned as an example to show______.

A．crows are cleverer than chimpanzees
B．crows have a certain amount of intelligence
C．non-primates are as intelligent as primates
D．non-primates are able to use tools