1、Nasal cavity -鼻腔Mouth cavity-口腔Tongue-舌Lips-唇Teeth-齿The teeth ridge-齿龈The hard palate -硬腭The soft palate -软腭 uvula -小舌Pharynx -咽头Larynx- 喉头The vocal cords- 声带Windpipe -气管 Vowels are sounds produced without obstruction of the air stream in the mouth. In producing them there is vibration of the vocal
2、cords, so all vowels are voiced . In English there are twenty vowels in all. Consonants are sounds produced by some form of obstruction of the air passage and be either voiced or voiceless .There are twenty-eight consonants in English./r /, /j/ ,/w/ 1)The height of the raised part of the tongue: we
3、distinguish open vowels, half-open vowels, half-close vowels and close vowels.2)The part of the tongue raised : we distinguish front, back and central vowels.3)The length of the vowel: we distinguish long vowels and short ones.4)The position (or shape) of the lips: we distinguish rounded vowels and unrounded ones.5)The degree of tenseness: we distinguish tense vowels and lax vowels.p 经常不断地学习,你就什么都知道。你知道得越多,你就越有力量p Study Constantly, And You Will Know Everything. The More You Know, The More Powerful You Will Be写在最后谢谢大家荣幸这一路，与你同行ItS An Honor To Walk With You All The Way演讲人：XXXXXX 时 间：XX年XX月XX日
