I've always enjoyed_____ football.A. to playB. playingC. play

题目

I've always enjoyed_____ football.

A. to play

B. playing

C. play

相似考题

1.I can be a teacher. I’m not a very patient person.A. seldom B. ever C. never D. always

2.乳牙萌出的顺序为A．I→Ⅱ→Ⅳ→Ⅲ→VB．I→Ⅱ→Ⅲ→]V→VC．I→Ⅲ→Ⅱ→Ⅳ→VD．Ⅱ→I→Ⅲ→Ⅳ→VE．Ⅱ→I→Ⅳ→Ⅲ→V

3.I_____ jogging every morning in the park.A. goB. doC. play

4.I()looked for the meaning of words in the context.A、continuouslyB、always

更多“I've always enjoyed_____ football.A. to playB. playingC. play ”相关问题

  • 第1题：

    I _________ table tennis quite well, but I haven ’t had time to play since the New Year.

    A. will play

    B. have played

    C. play


    参考答案：C

  • 第2题：

    I() ping－pang quite well, but I haven t had time to play since the new year.

    A、will play

    B、have palyed

    C、played

    D、play


    参考答案：D

  • 第3题：

    I can ( ) be a teacher. I’m not a very patient person.

    A. seldom B. ever C. never D. always


    正确答案：C

  • 第4题：

    I ________ always ________ that mistakes.

    A. am, making

    B. /, make

    C. will, make

    D. /, to make


    参考答案：B

  • 第5题：

    B 宽度优先（种子染色法）

    5．关键路径

    几个定义： 顶点1为源点，n为汇点。

    a. 顶点事件最早发生时间Ve[j], Ve [j] = max{ Ve [j] + w[I,j] },其中Ve (1) = 0;

    b. 顶点事件最晚发生时间 Vl[j], Vl [j] = min{ Vl[j] – w[I,j] },其中 Vl(n) = Ve(n);

    c. 边活动最早开始时间 Ee[I], 若边I由<j,k>表示，则Ee[I] = Ve[j];

    d. 边活动最晚开始时间 El[I], 若边I由<j,k>表示，则El[I] = Vl[k] – w[j,k];

    若 Ee[j] = El[j] ，则活动j为关键活动，由关键活动组成的路径为关键路径。

    求解方法：

    a. 从源点起topsort,判断是否有回路并计算Ve;


    正确答案：

     

     

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