单项选择题

What is the passage going to tell us

A．The functions of colors.
B．The great finding of the psychologists.
C．The best way to make use of colors.
D．The effects of colors on people.
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单项选择题
What will happen to the workers if the machines are painted gray compared with orange
A．Workers may be more cheerful and energetic.
B．More errors and accidents will occur.
C．There is no difference at all.
D．They will be more active and curious.
单项选择题
How do we choose our favorite colors
A．Our favorite color is inborn.
B．We choose our favorite color as we grow up.
C．With the instruction of our parents we select them.
D．We get them by chance.
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