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【单选题】
计算机内的信息是由“0”和“1”组成的数字信号,而在电话线上传递的却只能是模拟电信号,所以以下说法正确的是_________。A.
将模拟信号转换回数字信号称为“调制”
B.
电话拨号上网需要交换机和路由器
C.
将数字信号转换成相应的模拟信号,称为“调制”
D.
调制解调器是网络层的设备
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举一反三
【简答题】What is most obvious in this book are all those details of daily living which make Mrs. Richard _____ common. A. nothing but B. anything but C. above all D. rather than
【简答题】“本年利润”账户属于损益类账户，“累计折旧”账户属于资产类账户。（ ）
【简答题】“本年利润”账户属于损益类账户，“累计折旧”账户属于资产类账户。（ ）
【简答题】Concerning the future of the hydrogen economy, the most obvious step we will take is ____________.
【单选题】The most obvious and rapid change in the development of a language takes place in the area of ______.
A.
pronunciation
B.
vocabulary
C.
grammar
D.
speech
【简答题】“本年利润”账户属于损益类账户，“累计折旧”账户属于资产类账户。（ ）
【简答题】The most obvious difference between the working class and the middle class in English is their____
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