单项选择题

It is ________ to believe that the quantity of water keeps unchanged when it is contained in two different glasses.

A．easy to persuade children
B．hard for most children
C．innate of most children
D．difficult for both adults and children
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单项选择题
In this passage the author's attitude towards children's numerical skills is ________.
A．critical
B．approving
C．questioning
D．objective
单项选择题
Yoshihiro Kuroki ________.
A．is excited when the robots are performing a traditional Japanese dance
B．keeps silent because he is a little unsatisfied with the new product
C．witnesses the creation of a series of entertainment robots
D．is an executive manager of Sony Corp.
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