更多“Alice()with fear. She knew that it would soon be completely dark in the forest. ”相关问题
  • 第1题:

    ________ the vessel have no safety radiotelegraphy certificate at the time of her delivery,she ________ be held to be unseaworthy.

    A.If/may

    B.Will/shall

    C.Should/would

    D.Would/should


    正确答案:C

  • 第2题:

    He talks as if he__everything.

    A.knows
    B.was known
    C.will know
    D.knew

    答案:D
    解析:
    句中含有一个由as if引起的方式状语从句,这种从句有时要求用虚拟语气。本句是与现在事实相反的假设,因此谓语用过去式。

  • 第3题:

    —She‘s broken her arm again.
    —Again I______she_______ever broken it before.

    A.don‘t know;has
    B.didn’t know;had
    C.didn‘t know;has
    D.hadn’t know;would

    答案:B
    解析:

  • 第4题:

    Should the vessel have no deratisation certificate at the time of her delivery,she ______ be held to be unseaworthy.

    A.shall

    B.should

    C.may

    D.would


    正确答案:D

  • 第5题:

    Alice发送带数字签名的消息共有以下4个步骤,步骤的正确顺序是()。

    ①Alice生成消息摘要 ②Alice生成消息

    ③Alice发送消息 ④Alice利用私钥生成签名

    A.①②③④
    B.①②④③
    C.②①④③
    D.②①③④

    答案:C
    解析:
    在数字签名机制中,并非直接对消息进行签名,而是对消息形成的再要信息进程签名。正确的顺序应该是发送发先生成消息,然后利用MD5或sha-1消息摘要算法生成消息的摘要信息,然后利用发送发私钥对摘要值进行签名,并将此带有签名摘要值的消息发送至接收方。而接收方会利用同样的信息摘要算法,算出消息正文的摘要值,然后利用发送方的公钥验证发送方的签名摘要信息,并得到发送方的摘要值,两个摘要值对比,以判断消息在传输中是否被破坏。

  • 第6题:

    —She‘s broken her arm again.
    —Again I______she_______ever broken it before.

    A.don‘t know;has
    B.didn’t know;had
    C.didn‘t know;has
    D.hadn’t know;would

    答案:B
    解析: