is a device which enables digital microcomputers to communicate across analog telephone lines.A．The switchB．The modemC．The hubD．The repeater

题目

is a device which enables digital microcomputers to communicate across analog telephone lines.

A．The switch

B．The modem

C．The hub

D．The repeater

相似考题

1.Theprocessquantizingthecontinuousvaluesintoabinaryscaleiscalled().A.digital-to-analogconversionB.digital-to-digitalconversionC.analog-to-digitalconversionD.analog-to-analogconversion

2.He learned how to use sign language to ________ with deaf customers.A.contactB.talkC.connectD.communicate

3.She tried to ______ her fears to her mother.A.understandB.giveC.quoteD.communicate

4.The precision of ADC ( analog－to－digital conversion ) is determined by _____.A、its speedB、its gainC、the accuracy of the reference voltageD、the number of binary bits

更多“is a device which enables digital microcomputers to communicate across analog telepho ”相关问题

  • 第1题：

    Microcomputers () with the invention of microchips.

    A、appeared

    B、turned up

    C、came into being

    D、were realized


    参考答案：C

  • 第2题：

    ()systems can identify individuals with a high degree of certainty.

    A.Encryption

    B.Biometric

    C.Password Authentication

    D.Digital


    参考答案：B

  • 第3题：

    1digital为合法标识符


    a&b

  • 第4题：

    Speech is the fastest method of ________ between people.

    A. contact

    B. connect

    C. communication

    D. communicate


    参考答案：C

  • 第5题：

    下列程序的输出结果是______。 include int CalcDigital(char*str) { if(str= =NULL)

    下列程序的输出结果是______。

    include＜iostream.h＞

    int CalcDigital(char*str)

    {

    if(str= =NULL)

    return 0;

    int num_of_digital=0;

    for(int i=0;str{i]!=0x0;i++)

    if(str[i]＜='9'&& str[i]＞='0')

    num_of_digital++;

    return num_of_digital;

    }

    void main( )

    {

    char a[]="Beijing20080lympic";

    cout＜＜CalcDigital(a)＜＜endl;

    }


    正确答案：4
    4 解析：分析本题可知函数功能为计算一个字符串中包含的数字个数。字符串中包含的数字有2008，故输出为4。

  • 第6题：

    模拟数字转换器, 英文简称ADC, 英文全称为：

    A．Ambulance to Digital Converter

    B．Analog-to- Destination Converter

    C．Ambulance to Destination Converter

    D．Analog-to-Digital Converter


    Analog-to-Digital Converter

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