● 题目：

　　Kant and Freud felt that joke-telling relies on building up a psychic tension which is safely punctured by the ludicrousness of the punchline.(剑5, Test 2 passage 2)

　　● 分析：

　　本句的主句为“Kant and Freud felt that…”, 其中“that joke-telling relies on building up a psychic tension which is safely punctured by the ludicrousness of the punchline.”为that引导的宾语从句，做felt的宾语;而“which is safely punctured by the ludicrousness of the punchline”为定语从句，做a psychic tension的定语，关系词为which。