单项选择题

According to the author, three design types of previous researches are ______.

A．interrelated to one another
B．supplementary to one another
C．to be modified considerably
D．to be integrated into one design
<上一题 目录 下一题>
热门 试题

单项选择题
It is implied in the passage that ______.
A．parents can never hope to teach their children new sounds
B．children no longer imitate people after they being to speak
C．even after they have learnt to speak children still enjoy imitating
D．children who are good at imitating learn new words more quickly
单项选择题
It can be inferred from the passage that when a 7-month baby calls his or her mother mama ______.
A．he probably has known that mother should be called in this way
B．he probably does not know the sound stands for ,'mother"
C．he probably has already known the meaning of mama
D．it is the first meaningful sound pronounced by him
相关试题