【正确答案】正确答案：When the vocal cords are spread apart, the air from the lungs passes between them unimpeded. Sounds produced in this way are described as voiceless, consonants(p, s, t)are produced in this way; but when the vocal cords are drawn together, the air from the lungs repeatedly pushes them apart as it passes through, creating a vibration effect. Sounds produced in this way are described as voiced(b, z, d)are voiced consonants.