AUGUST 19, 2011 I just realized that I haven’t included a single word about JackPhillips, who introduced Return on Investment (ROI) as Level 5 to Kirkpatrick’s Four Levels of Evaluation. My first exposure to’ ROI—although I didn’t realize it at the time—was through a colleague who...
2) cross-head screwdriver A:Technically, they are different. I always use "Phillips." https://en.wikipedia.org/wiki/List_of_screw_drives 查看更多回答 Q:Why is thePhillipshead screwdriver called “Phillips?” 聼起來自然嗎? A:I think it’s just a type of screw invented by someone named ...