If "hot" subjects can turn out "cool" and "cool" ones "hot," what sort of thermometer should a high school student consult in deciding where to place his chips?
十餘年前，美國的就業市場需要大量圖書館管理人才；當時國內各地方政府、中等學校的圖書館也欠缺學有專長的管理員，一時國內各大學的圖館系迅速熱起來，不斷增加招生名額。