问题
单项选择题
Each Cell of Asynchronous Transfer Mode (ATM) has fix length. How long is it
A．50B
B．51B
C．52B
D．53B
答案
参考答案：D
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Each Cell of Asynchronous Transfer Mode (ATM) has fix length. How long is it
A．50B
B．51B
C．52B
D．53B
参考答案：D