A context-free grammar G consists of four parts: a group of nonterminals, a group of terminals, a start symbol, and a group of ().
A: sentence
B: sentence pattern
C: word
D: Production
A: sentence
B: sentence pattern
C: word
D: Production
举一反三
- In top-down grammatical analysis, analysis should start from ()。 A: sentence<br/>pattern B: sentence C: grammar start symbol D: handle
- The values of a person or group are the ...an in this sentence?
- A thought group couldn’t be a ____________. A: phrase B: simple sentence C: word D: simple clause
- The sequence of grammar symbols derived from the beginning symbol of the grammar after several steps (including 0 step) is called( )。 A: language B: Sentence<br/>pattern C: Sentence D: Handle
- ggplot2中的前缀gg表示什么？ A: grammar of group B: graphic of group C: graphic of grammar D: grammar of graphic