As defined in terms of spoken language, a word is viewed as a sound or combination of sounds which are made voluntarily with human （ ） equipment.
A.visual B.vocal C.physical D.mental正确答案B
As defined in terms of spoken language, a word is viewed as a sound or combination of sounds which are made voluntarily with human （ ） equipment.
A.visual B.vocal C.physical D.mental正确答案B
