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d both in library and on web, which is a totally new approach to us. neither was mr. caleb satisfied with secondhand information only. during the process, he also interviewed with supervisors of some scientific institutes of chicago to obtain firsthand information. his teaching is equally praiseworthy. i often heard his students said that s lectures were interesting and enlightening and they loved to listen to his lectures. in fact, he has his own teaching my knowledge,it is quite western. in other words, he pays more attention to arouse the desire of seeking knowledge among his students instead of maint