We can realise how deeply a finger is put into water at body temperature ______.A.from the

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

A.from the sense of direct touch

B.through the skin contact

C.through the difference in temperature

D.from the even distribution of pressure

热搜:a是b的充分条件,b是a的必要条件吗