为实现以ADSL方式接入Internet,至少需要在计算机中内置或外置的一个关键硬设备是(  )。

为实现以ADSL方式接入Internet,至少需要在计算机中内置或外置的一个关键硬设备是(  )。A.网卡 B.集线器 C.服务器 D.调制解调器(Modem)

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在一个非零无符号二进制整数之后添加一个0,则此数的值为原数的(  )。

在一个非零无符号二进制整数之后添加一个0,则此数的值为原数的(  )。A.4倍 B.2倍 C.1/2倍 D.1/4倍

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Directions: There are 10 blanks in the following passage.For

Directions: There are 10 blanks in the following passage.For each numbered blank

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What is the author‘s main concern?

What is the author‘s main concern? A.How to render automobiles pollution-free. B

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You would be ___ a risk to let your child go to school by hi

You would be ___ a risk to let your child go to school by himself.A.omitting B.a

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