咀嚼肌包括_________、_________、_________,______以及舌骨上肌群。_________,____________、_________,收缩时,作用力方向朝上,可上提下颌骨,故称为____________肌群。舌骨上肌中的二腹肌前腹,下颌舌骨肌群与颏舌骨肌附着于下颌骨,舌骨固定时可下降下颌骨故称为____________肌群,________与______肌群之间保持一定生理平衡,产生自然的____________,并参与___________、___________、__________、________等下颌运动。
— What would you like to have, meat or fish?
— _____________________.
— ___________________
— Once or twice a week.
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