单项选择题


A．practice
B．rule
C．law
D．sense
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单项选择题
If people are exposed to bright red, which of the following things does NOT happen
A．They breathe faster.
B．Their blood pressure rises.
C．They feel afraid.
D．Their hearts beat faster.
单项选择题
Our preferences for certain colors are ______.
A．associated with the time of day
B．dependent on our characters
C．linked with our primitive ancestors
D．partly due to psychological factors
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