• 2022-06-17
    Grammer G[]= ( {b} , {N , B} , N , {N→b│ bB , B→bN} ), The language described in this grammar is ().
    A: L(G[N])={bi│
    i ≥ 0}
    B: L(G[N])={b2i│
    i≥ 0}
    C: L(G[N])={b2i+1│
    i ≥ 0}
    D: L(G[N])={b2i+1│
    i ≥ 1}
  • C

    内容

    • 0

      在无向图G的邻接矩阵A中,若A[i]&#91;j&#93;=1,则A&#91;j&#93;[i]=(<br/>)。[/i][/i] A: 0 B: 1 C: n D: 不确定

    • 1

      下列各组量子数中正确的是()。 A: n=3,l<br/>=3,m=0,ms=<br/>-1/2 B: n=2,l<br/>=0,m=+1,ms=<br/>+1/2 C: n=4,l<br/>=-1,m=0,ms=<br/>+1/2 D: n=3,l<br/>=1,m=-1,ms=-1/2

    • 2

      1 Complete the words ► p r e v e n t prevent 1 i n f _ _ _ i o n ____ 2 b _ n d _ g e ____ 3 t h _ r _ _ g h l _ ____ 4 w _ _ n d ____ 5 b l _ _ d ____ 6 s _ m p t _ m ____ 7 t _ _ p o r _ r _ l y ____ 8 d _ v _ l _ p ____

    • 3

      1 Complete the words. ► o u t s t a n d i n g outstanding 1 e_ _ _ v a l e n t ____ 2 _ _ _ d u c e ____ 3 _ _ _ p o r t i n g r o _ _ ____ 4 _ _ _ i v i d u a l ____ 5 a _ _ r d ____ 6 a c _ _ e v e ____ 7 w_ _ n _ r ____ 8 p _ _ z e ____

    • 4

      文法G&#91;N&#93;为:N→D|ND D→0|1|2|3|4|5|6|7|8|9 G&#91;N&#93;的语言是什么? A: L(G[N])={[img=23x19]180344213df2ad7.png[/img] | V∈ {0,1,2,3,4,5,6,7,8,9},n>=1} B: L(G[N])={非负整数} C: L(G[N])={允许0 开头的非负整数} D: L(G[N])={[img=23x19]180344213df2ad7.png[/img] | V∈ {0,1,2,3,4,5,6,7,8,9},n>=0}