题目
题目

LIN102H1S Homework 02 (due 28 Jan Tue at 11:59pm)

多项选择题

The following is a very 'abstract' Phrase Structure Rule. Instead of categories, it just references variables like X, Y, Z. S -> X (Y) Z+ This will generate a number of strings, including: X Y Z X Y Z Z Choose all the additional strings below that this rule generates: 

选项
A.Y Z Z Z Z
B.X Y
C.X X Y Z Z
D.Y Z Z
E.X Z
F.Y Z
G.X Y Z Z
H.X Z Z Z Z
I.X Z Z
J.X Y Y Z
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标准答案
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思路分析
First, we need to understand the given abstract phrase structure rule: S -> X (Y) Z+. This means the string must start with X, then optionally Y, and then one or more Z's (Z+ indicates at least one Z, possibly many). With this in mind, we can evaluate each candidate string. - Option: "Y Z Z Z Z" — This starts with Y, not X, so it cannot be generated by the rule. The initial symbol must be X, so this is inv......Login to view full explanation

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