资讯

BBC1 个月
Why do leaves fall off trees?
It’s autumn, and that means the leaves on the trees are turning beautiful shades of yellow and red, before falling off entirely ... the time and they don’t fall off. The reason for this ...
Harvard Business School7 年
Fall Before Rising, A: The Story of Jai Jaikumar (A)
Bowen, H. Kent, Richard Compton Squire, Sarah Patricia Vickers-Willis, and Harry James Wilson. "Fall Before Rising, A: The Story of Jai Jaikumar (A)." Harvard Business School Background Note 600-047, ...
Harvard Business School7 年
Fall Before Rising, A: The Story of Jai Jaikumar (B)
Bowen, H. Kent, Richard Compton Squire, Sarah Patricia Vickers-Willis, and Harry James Wilson. "Fall Before Rising, A: The Story of Jai Jaikumar (B)." Harvard Business School Background Note 600-048, ...