When performing mouth-to-mouth blowing, the lips of the rescuer should cover the lips of the wounded to avoid air leakage（)
举一反三
- Plosives are sounds produced with the air ______ _______ at some point in the mouth by the lips or _______ or tongue back and then released with a slight _______.
- 1. The main difference between/e/and/ə/lies in the__________. A: tongue position B: sound duration C: openness of the mouth D: shape of the lips
- 3) English vowels can be classified in terms of the following EXCEPT_______. A: tongue position B: openness of the mouth C: place of articulation D: shape of the lips
- When coughing and sneezing, we can cover our mouth and nose with a tissue.
- Which of the following criteria can NOT be used to classify vowels A: The part of the tongue that is held highest B: The openness of the mouth C: The vibration of the vocal cords D: The shape of the lips