单选题安装了56k的Modem，则（）。A上网速度一定能达到56kbpsB上网速度一般大于56kbpsC上网速度与Modem速率无关D上网速度一般小于56kbps
单选题
安装了56k的Modem，则（）。
A
上网速度一定能达到56kbps
B
上网速度一般大于56kbps
C
上网速度与Modem速率无关
D
上网速度一般小于56kbps
参考解析
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