更多“E-Mail is a fast,cheap and convenient way to(72)messages locally and internationally.A.giv ”相关问题
  • 第1题:

    The major problem with E-mail is that it is(71)easy to use that people can become(72)with messages(73)they can possibly answer in a day. In addition, mail boxes require some management to(74)messages or archive those that might be required later. Senders don't always know about your E-mail backlog and often send(75)messages.

    A.too

    B.so

    C.very

    D.much


    正确答案:B

  • 第2题:

    In low-speed network,it is usually adequate to wait for congestion to occur and then react to it by telling the source of packets to slow down.In high-speed networks,this approach often works poorly,because in the(71)between sending the notification and notification arriving at the source,thousands of additional(72)may arrive.In ATM network,a major tool for preventing(73)is(74)control.When a host wants a new virtual(75),it must describe the traffic to be offered and the service expected.

    A.path
    B.rout
    C.circuit
    D.way

    答案:C
    解析:
    在低速网络中,通常采用碰到拥塞时,通过向源端反映使其降低发送速率。而在告诉网络中,这种方式将会恶化,因为在发送通告和通告到达之间会有成千上万的其它数据包到达。在ATM网络中,主要采用允许控制来避免拥塞,当有一台主机要建立一条新的虚连接时,它必须描述它所需的流量和服务等级。

  • 第3题:

    We'll get you informed of the meeting the moment the manager becomes __________.

    A.accessible
    B.useful
    C.available
    D.convenient

    答案:C
    解析:
    考查形容词辨析。accessible“可接近的,易相处的”;useful“有用的”;available“可获得的,有空的”;convenient“方便的”。句意为“经理一有空我们就会通知你开会”。故选C。

  • 第4题:

    Oneofthekeydecisionmakingfactorsinaverycompetitiveopportunitywillbecost. CompanycomneedsanaggregaterPerfratingof120.Whatisthebestsolution?()

    A.Twop557016way1.9MHzmachines

    B.Onep559032way1.65MHzmachines

    C.Onep559532way1.65MHzmachines

    D.Twop557016way1.65MHzmachines


    参考答案:D

  • 第5题:

    We ′ll get you informed of the meeting the moment the manager becomes ___________

    A.accessible
    B.useful
    C.available
    D.convenient

    答案:C
    解析:
    考查形容词辨析。accessible“可接近的,易相处的”,useful“有用的”,available“可获得的,有空的”,convenient“方便的”。句意为“经理一有空我们就会通知您开会”。故选C。

  • 第6题:

    下面的命令可以实现只能往/var/log/messages里面追加数据,但不能删除的功能。 chattr +a /var/log/messages


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