听力原文:(A) The woman is making coffee. (B) The window is being closed. (C) The woman is looking outside. (D) The woman is drinking coffee.
A.
B.
C.
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【简答题】A frame of 1500 bytes travel through five switches along the path. Each link has a bandwidth of 100 Mbps, a length of 100 m, and a propagation speed of 2 × 10 8 m/sec. Assuming a queuing and processin...