单项选择题


A．how
B．what
C．why
D．that
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单项选择题
A．estimatedB．establishedC．suggestedD．believed
A．estimated
B．established
C．suggested
D．believed
单项选择题
The distinct and typical pattern of responses is produced by______.
A．the autonomic nervous system
B．the voluntary nervous system
C．the brain's motor cortex
D．the brain's hypothalamus
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