单项选择题

We can realize how deeply a finger is put into water at body temperature ______.

A．from the sense of direct touch
B．through the difference in temperature
C．through skin contact
D．from the even distribution of pressure
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单项选择题
From the passage we realize that ______.
A．man possesses far more senses than the five major ones
B．man possesses a few more senses than animals
C．man possesses as many senses as animals
D．man has fully utilized his senses
单项选择题
Which of the following is TRUE
A．Man is more colour-conscious than the honey-bee.
B．The honey-bee is blind to red.
C．The honey-bee can see far more colours than man.
D．Man is sensitive to the ultra-violet.
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