听力原文:W: Hello, Mr. Walters. Is there anything I can do for you? M: I'd like to see Mr. Benson about your company's product. Q: What does Mr. Waiters want? (5)
A.
To sell a product to Mr. Benson.
B.
To invite Mr. Benson to his company.
C.
To discuss something with Mr. Benson.
D.
To place a order with Benson's company
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【简答题】对于文法 G(E): S → SaP | Sf | P P → qbP | q ( 1 )对文法改写(消除左递归,提取左公共因子) ( 2 )计算FIRST、FOLLOW和SELECT集合判断是否是 LL(1) 文法