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It's about Presentations: preparation and introduction

Type of presentation

• press conference /k'ɑnfɚəns/
• briefing  /br'ifɪŋ/ 
• demonstration /d,ɛmənstr'eʃən/  
• product launch
• lecture  /l'ɛktʃɚ/  
• seminar /s'ɛmən,ɑr/  
• workshop

This is a little part of class at last weekend's.