97免费在线观看视频,亚洲综合自拍网,黄色毛片免费观看,热久久综合网,免费看日产一区二区三区 狠狠操av,久久久涩涩涩,在线精品免费视频,人人插天天干,久久91精品国产91久久

單項選擇題

Which of these is the best way to convince a prospect of the benefits of the S-Series?() 

A. show them independent tests and reviews
B. describe the theory of operation and system internals
C. give a Microsoft PowerPoint presentation
D. give a demonstration that could lead to an evaluation

微信掃碼免費搜題