【判断题】【消耗次数：1】
OSI参考模型是一种将异构系统互连的分层结构，提供了控制互连系统交互规则的标准骨架。
①
正确
②
错误
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相关题目
【简答题】
[填空]描述系统的控制结构，它是用来确定各个对象之间交互及整体的控制结构的模型。
【单选题】
下面选项中并非正确地描述OSI参考模型的是（ ） 。
①
为防止一个区域的网络变化影响另一个区域的网络
②
分层网络模型增加了复杂性
③
为使专业的开发成为可能
④
分层网络模型标准化了接口
随机题目
【单选题】
This year’s total output value of industry and agriculture will increase ____ 5 percent over last year.
①
to
②
of
③
with
④
by
【单选题】
They are working hard to____ what they have lost.
①
make out for
②
keep up with
③
catch up with
④
make up for
【单选题】
How can he ______ if he is not ______ ?
①
listen; hearing
②
hear; listening
③
be listening; heard
④
be hearing; listened to
【单选题】
This ATM has been out of service for a few days. It should ____ last week.
①
be fixed
②
have fixed
③
fix
④
have been fixed
【单选题】
“Uncle Li used to live in the town, ____ he?”
①
weren’t
②
didn’t
③
wouldn’t
④
hadn’t
【单选题】
At that time, the committee, so far as I know, _______ of three scientists, two professors, and four senior engineers.
①
composed
②
comprised
③
consisted
④
made up
【单选题】
-- How long ______ you ______ the library book?-- For three days.
①
have; borrowed
②
have; kept
③
borrow
④
were; kept
【单选题】
I ____ up early this morning, so I stayed in bed until 8 o’clock a.m. .
①
needn’t have got
②
didn’t need to get
③
shouldn’t have got
④
can’t have got
【单选题】
Only in this way ____ out of the plan.
①
you can talk him
②
him can you talk
③
him you can talk
④
can you talk him