单项选择题

From the passage we know that the nerve impulses in human beings ______.

A．are lack of differentiation in quality
B．are similar in size, number, and arrangements
C．reveal qualitative diversity
D．spasmodically pass through the nervous system
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单项选择题
The author's purpose of writing this article is to present the historical view of ______.
A．the developmental patterning of the neural circuits
B．the sensory field of the cerebral cortex
C．variations in size, shape, chemistry, conduction speed of nerve pulses
D．physiological correlates of mental experience
单项选择题
From paragraph 1 we can learn that by 1950, ______.
A．scientists have reached a consensus on the relationship between brain processes and mental experience
B．variations in nerve cells are proved to be significantly correlated with mental experience
C．attempts to correlate mental experience with brain processes have been viewed with pessimism
D．scientists are indifferent to the manifold dimensions of mental experience
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