For each group of sounds listed below, state the phonetic feature(s) then share:
Example: [s] [f] [p] [h] voiceless
1) [g] [z] [d]
2) [v] [h] [s]
3) [m] [p] [b] [f] [v]
4) [t] [d] [n] [l] [s] [z]
5) [i:] [i] [u] [u:]
參考答案:1)voiced sound
2) [v]voiced sound;[h][s] voiceless
3) [p][f] voiceless;[m][b][v] voiced sound
4)[t][s]voiceless;[d][n][l][z]voiced sound
5)都是元音