【单选题】【消耗次数：1】
若信道的复用是以信息在一帧中的时间位置(时隙)来区分，不需要另外的信息头来标志信息的身分，则这种复用方式为（）。
①
异步时分复用
②
频分多路复用
③
同步时分复用
④
以上均不对
参考答案：
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相关题目
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复用的方法有频分复用、时分复用和[填空]。
【简答题】
除码分多路以外，多路复用一般有两种方式：时分多路复用和[填空]。
【单选题】
在数据传输的线路复用技术中，时分复用与统计时分复用的区别是
①
时分复用采用时间片控制，统计时分复用不采用时间片控制
②
时分复用采用固定时间片控制，统计时分复用采用按需分配时间片控制
③
时分复用采用预先扫描用户需求控制，统计时分复用不预先扫描用户需求控制
④
时分复用与统计时分复用在信道复用控制策略上基本相同
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为什么要使用信道复用技术？常用的信道复用技术有哪些？
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There was so much noise in the classroom that the teacher couldn’t make himself _______.
①
heard
②
hearing
③
to hear
④
hear
【单选题】
He will surely finish the job on time _______ he is left to do it in his own way.
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in that
②
in case
③
as far as
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so long as
【单选题】
When the girl heard the news, she could do nothing but ______ back home.
①
going
②
went
③
to go
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go
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Due to the fact that she was naturally timid, she shrank from any ____ social and cultural activities.
①
comprehension of
②
study on
③
success in
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participation in
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The shop offers almost everything（）ranges from inexpensive to very expensive.
①
that
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which
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who
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in which
【单选题】
I am unhappy because she accepted my invitation _______ .
①
passively
②
extremely
③
undoubtedly
④
unwillingly
【单选题】
It’s getting late and I have to leave now.____________
①
So soon! I hope youve enjoyed it.
②
Have a cup of tea.
③
Not at all.
④
How about a cup of coffee?
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You can experience a fast internet connection in（）the same way as you do in the office.
①
more
②
much
③
better .
④
most
【单选题】
Thank you ever so much for the scarf you bought me.____________
①
No thanks.
②
No, it’s not so good.
③
I’m glad you like it.
④
Please don’t say so.