(单选题)21: ( )the main source of energy for speaking, initiating the airflow for speech, hence pulmonic airstream mechanism.
A: Mouth
B: Heart
C: Nose
D: Lung
(责任编辑:admin) |
(单选题)21: ( )the main source of energy for speaking, initiating the airflow for speech, hence pulmonic airstream mechanism.
A: Mouth
B: Heart
C: Nose
D: Lung
(责任编辑:admin) |