（）算法A的功能是逆置廣義表p（即廣義表由p指針所指）逆置後的廣義表由t指向
（）逆置後的廣義表由t指向這時p=nil
（ab）
（d）
否廣義表的長度不是廣義表中原子個數而是指廣義表中所含元素的個數廣義表中的元素可以是原子也可以是子表廣義表元素多於個時元素間用逗號分開
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From:http://tw.wingwit.com/Article/program/sjjg/201311/23036.html
