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【单选题】The single most shattering statistic about life in America in the late 1990s was that tobacco killed more people than the combined total of those who died from AIDS, car accidents, alcohol, murder, su...
A.
Allan Brandt is a writer of great talent for writing.
B.
the tobacco industry was just out of a heavy fine.
C.
most of the Americans died from lung cancer.
D.
the book on a history of the cigarette is unintelligible.
【简答题】( )是指企业在计划期内新创造的价值。
【简答题】计算机病毒的主要传播途径有哪些?请列举3种。
【单选题】下面关于数据通信的说法错误的是（ ）。
A.
电话通信是利用数字通信传送数字信号
B.
数字数据通信是指直接在传输介质上传送脉冲数字信号
C.
模拟通信和数字通信方式都可以传输模拟信号和数字信号
D.
模拟数据是连续变化的数值
【单选题】What can we learn about Hillsdale's students in the late 1990s?
A.
They were made to study hard like prisoners.
B.
They called each other by unaffectionate nicknames.
C.
Most of them did not have any sense of discipline.
D.
Their school performance was getting worse.
【单选题】家里拨号上网需要使用MODEM。下面关于MODEM的说法中错误的是______。
A.
调制器完成将模拟信号恢复成数字信号的功能
B.
MODEM的调制方式主要有：振幅调制、频率调制和相位调制
C.
MODEM主要分为外置式、内置式、插卡式和机架式
D.
MODEM的传输模式主要有：传真模式、语音模式
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