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【说明】本题目的填空内容若需填写多个符号,符号间请用,隔开 已知文法G(S)如下: (1) S → AB (2)A → Ba | ε (3)B → Db |D (4)D → d| ε 问:1)上述文法中能推出ε的非终结符号有(第1空) 2 )若已知First(S)={a,d,b,ε},则First(A)= First(S)?(第2空 填 是/否) 3 )First(D)比First(S)少(第3空)终结符号 4 )已知Follow(S)={#},则Follow(A)={第4空(仅需要填写其中的终结符号)} Follow(B)={ 第5空(仅需要填写其中的终结符号)} 5 )Select(A → Ba)={ 第6空(仅需要填写其中的终结符号)} Select(A → ε)={ 第7空(仅需要填写其中的终结符号)} Select(B → Db)={ 第8空(仅需要填写其中的终结符号)} Select(B → D)={ 第9空(仅需要填写其中的终结符号)} 6 )上述A,B的多个产生式右部的select()交集是 Ø 吗?所以该文法是LL(1)吗?(第10空(此处仅需填写是/否))
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