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【单选题】
文法G＝({A,B,S},{a,b,c},P,S)其中P为： S→Ac|aB A→ab B→bc写出L(G[S])的全部元素。A.
L(G[S])={ab,bc}
B.
L(G[S])={abc}
C.
L(G[S])={abc,abc}
D.
L(G[S])={ac,abc}
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【判断题】Look at the sentence and decide if the paraphrase which follows is true or false.The museum is asking vsitors for a voluntary $2.You don't need to pay $2 to visit the museum.
A.
正确
B.
错误
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A.
le fondateur du fauvisme.
B.
le fondateur du cubisme.
C.
le chef du fauvisme.
D.
le chef de l'impressionnisme.
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【简答题】considérer...comme...
【单选题】— _______ Amy late for school? —Never. [ ]
A.
How long is
B.
How often does
C.
How many times does
D.
How often is
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