Pain is vital to the survival of human being and all mammalian because
A. it can be found in vertebrates.
B. it consists of nervous elements.
C. it underlies mental life.
D. it is a response to harmful stimuli.
查看答案
A．turns outB．turns upC．turns aroundD．turns down
A. turns out
B. turns up
C. turns around
D. turns down
A．no more thanB．not more thanC．a bit more thanD．much more than
A. no more than
B. not more than
C. a bit more than
D. much more than
The human nervous system differs from that of animals in that
A. man has more developed forebrain.
B. man can feel pains while animals can't.
C. man has different neural structures.
D. man's mental life is in nature different from that of animals.
We can conclude from the last paragraph that
A. the reactions of the pupils are relevant to pain.
B. the fact that animals see and hear has been commonly accepted.
C. animals can feel pain in exceptional circumstances.
D. it's reasonable to suppose that animals don't feel pain.
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