He () (forget, take) the keys with him, so he had to wait outside his house.

题目
He () (forget, take) the keys with him, so he had to wait outside his house.


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  • 第1题:

    You are signing on a deck officer,who will be designated as one of the GMDSS operators,before sailing foreign.Which statement is TRUE ________.

    A.He/she must have an STCW certificate endorsed as“Valid for Service on Vessels Operating in the GMDSS System”

    B.He/she must present either an FCC-issued license or a Coast Guard-issued license

    C.You must consult the“List of Qualifications”on the reverse of his/her FCC-issued license

    D.His/her Merchant Mariners Document must have an added endorsement as “Radio Electronics Officer”


    正确答案:A

  • 第2题:

    He’s a strange child and his teachers find it difficult to ______ him.

    A.scold
    B.reach
    C.play
    D.seize

    答案:B
    解析:
    选项A意为“责骂”;选项B意为“到达,理解,与……沟通”;选项C意为“玩耍”;选项D意为“抓住”。根据题干,题目意为“他是一个奇怪的孩子,他的老师觉得很难和他交流。”根据题干,reach him意为“与他进行沟通、理解他的想法”,选项B符合题意。
      

  • 第3题:

    在生产者/消费者问题中,用s表示互斥信号量,e表示空缓冲区资源信号量,n表示满缓冲区资源信号量,下列生产者和消费者的操作(生产者和消费者可并发执行),可能产生死锁的是()。

    A.生产者:wait(s); wait(e); append(); signal(n); signal(s);消费者: wait(s); wait(n); take(); signal(e); signal(s);

    B.生产者:wait(s); wait(e); append(); signal(n); signal(s);消费者: wait(n); wait(s); take(); signal(s); signal(e);

    C.生产者:wait(e); wait(s); append(); signal(s); signal(n);消费者: wait(s); wait(n); take(); signal(e); signal(s);

    D.生产者:wait(e); wait(s); append(); signal(s); signal(n);消费者: wait(n); wait(s); take(); signal(s); signa


  • 第4题:

    The working parent is not willing to listen to her (his) four-year-old child talking about hissandbox games because she (he) is___________.

    A.boring
    B.very tired
    C.busy
    D.angry

    答案:B
    解析:
    通读第四段,注意短语“fartoo beaten down”,可知父母每天工作非常辛苦和疲惫。所以和孩子的交流沟通少了。正确答案为B。A、C、D都不符合题意。

  • 第5题:

    在生产者/消费者问题中,用s表示实施互斥的信号量,e表示与缓冲区空闲空间数量相关的信号量,n表示与缓冲区中数据项个数相关的信号量,下列生产者和消费者的操作(生产者和消费者可并发执行),可能产生死锁的是()。

    A.生产者:wait(s); wait(e); append(); signal(n); signal(s);消费者: wait(s); wait(n); take(); signal(e); signal(s);

    B.生产者:wait(s); wait(e); append(); signal(n); signal(s);消费者: wait(n); wait(s); take(); signal(s); signal(e);

    C.生产者:wait(e); wait(s); append(); signal(s); signal(n);消费者: wait(s); wait(n); take(); signal(e); signal(s);

    D.生产者:wait(e); wait(s); append(); signal(s); signal(n);消费者: wait(n); wait(s); take(); signal(s); signa


    D