更多“I don't regret()the concert yesterday because of my baby's first birthday.A. ”相关问题
  • 第1题:

    A: I saw Tom just now at the café

    B:It ( )be him. He went to U.S.A. yesterday.

    A. mustn't

    B. can't

    C. shouldn't


    正确答案:B

  • 第2题:

    -- Ann is in hospital.

    -- Oh, really? I __ know. I __ go and visit her.

    A. didn’t; am going to B. don’t; would

    C. don’t; will D. didn't; will


    正确答案:D

  • 第3题:

    下列哪个URI写法符合RESTful 设计规范?

    A.http://api.example.restapi.org/blogs/mark-masse/entries/this_is_my_first_post

    B.http://api.example.restapi.org/blogs/mark-masse/entries/this_is_my_first_post/

    C.http://api.example.restapi.org/blogs/mark-masse/entries/this-is-my-first-post

    D.http://api.example.restapi.org/blogs/mark-masse/entries/this-is-my-first-post/


    C

  • 第4题:

    I’d rather you ________ make any comment on the issue for the time being.

    A) don’t     B) wouldn’t     C) didn’t            D) shouldn’t    

     


    选C
    would rather that……"宁愿……",that从句中用过去时表示现在或将来要做的事。

  • 第5题:

    如下电路中,t<2s,电流为2A,方向由a流向b;t>2s,电流3A方向由b流向a,参考方向如图所示,则I(t)为()。

    A.I(t)=2A,t<2s;I(t)=3A,t>2s
    B.I(t)=2A,t<2s;I(t)=-3A,t>2s
    C.I(t)=-2A,t<3s;I(t)=3A,t>2s
    D.I(t)=-2A,t<2s;I(t)=-3A,t>2s

    答案:B
    解析:
    由题意可知:按图示电流的方向为a→b为正。当t<2s,电流方向与参考方向一致,则I(t)=2A;t>2s时,电流方向与参考方向相反,则I(t)=-3A。

  • 第6题:

    考虑下面文法G(S): S→a∣ᴧ∣(T) T→T,S∣S (1)消去G(S)的左递归。 (2)给出所有非终结符的FIRST()和FOLLOW()集合。


    S ->(L)| a B B -> S | ε L -> S A A -> ,S A | ε