Which is the description of the consonant [ b ] ? A: voiceless bilabial stop B: voiced bilabial stop C: voiceless alveolar fricative D: voiced alveolar fricative

中国大学MOOC: The voiceless bilabial stop in English is _____________.

What phonetic features do "[P]" and "[m]" share A: Nasal, bilabial. B: Nasal, stop. C: Affricate, consonant. D: Bilabial, consonant.