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【单选题】
如果设τ为以太网单程端到端的时延, T 0 为帧的发送时间, 那么为了提高以太网的信道 利用率, 我们希望( )。A.
T 0 越小越好
B.
帧的长度越短越好
C.
信道长度越短越好
D.
T 0 /τ 越小越好
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举一反三
【单选题】The main purpose of this text is to______.
A.
tell students of important schedule changes
B.
tell students of new bus and library services
C.
show the excellent services for students
D.
ask students to renew their library cards
【单选题】The purpose of this passage is to tell readers ______.
A.
how to help the hard of hearing
B.
that people who lose their hearing have to learn new ways of communicating
C.
that a deaf person has to lip-read even when using a hearing aid
D.
that people who lose their hearing have to learn new ways of communicating
【简答题】Although for the purpose of this article English literature is treated as being confined to writings in English by natives or inhabitants of the British Isles, it is to a certain extent the case that ...
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