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
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单项选择题
In the first paragraph, the author draws an analogy between _______.
A．doing research and drawing a picture
B．research finding and pictures perspective
C．designing a research and making a quick drawing
D．a researcher and a painter
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
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