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【判断题】
在任何情况下,数据包的数据部分,即封装的传输层 PDU,在网络层的各个过程中都将保持不变。A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】Little __ what others think.
A.
does he care about
B.
did he care about
C.
he cares about
D.
he cared about
【简答题】早期连锁企业的连锁方式是( )。
【简答题】A．He is optimistic about the next year's market. B．He is worried about the increase in food prices. C．He is not sure about the petrol prices. D．He is pleasant for the decrease in unemployment.
【单选题】A. He is optimistic about it. B. He is curious about it. C. He is sure about it. D. He is pessimistic about it.
A.
He is optimistic about it.
B.
He is curious about it.
C.
He is sure about it.
D.
He is pessimistic about it.
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