题目内容
(请给出正确答案)
[单选题]
文法G[S]:S→S+U|U ,U→U*V|V ,V→(S)a 。则句型P+T+i的句柄和最左素短语为()。
A.V+U和a
B.V和V+U
C.a和V+U+a
D.V和U
答案
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A.V+U和a
B.V和V+U
C.a和V+U+a
D.V和U
第1题
A.错误
B.正确
第5题
A.错误
B.正确
第8题
A.①
B.①②
C.①②③
D.①②③④
第9题
As a matter of fact, a lazy student would never______to his family s expectations.
A.live up
B.work up
C.make up
D.stand up
第11题
What does the author see as the function of the universe's unseen "switches"?
A.They tell us which one of the tracks the universe will use.
B.They enable us to alter the course of t he universe.
C.They give us information about the lunar surface.
D.They determine which course the universe will take in the future.