【判断题】【消耗次数：1】
网络协议的三要素是语义、语法与层次结构
①
正确
②
错误
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相关题目
【简答题】
网络协议三要素为语法、语义、[填空]
【简答题】
网络协议三要素为[填空]、语义、同步
【单选题】
一个网络协议主要由以下三个要素组成：I．响应 II. 语法 III. 同步 IV. 语义
它们分别是： （ ）．
①
.I,III 和IV
②
II,III 和IV
③
I，II 和III
④
I，II 和IV
随机题目
【单选题】
Jean did not have time to go to the concert last night because she was busy __________ for her examination.
①
to prepare
②
to be prepared
③
preparing
④
being prepared
【单选题】
The adviser recommended that Mary _____ the training program as soon as possible.
①
started
②
starts
③
start
④
would start
【单选题】
The computer doesn’t work well, so something _________ wrong.
①
can have gone
②
should have gone
③
must have gone
④
ought to have gone
【单选题】
He made a mistake, but then he corrected the situation it got worse.
①
until
②
when
③
before
④
as
【单选题】
Please help yourself to the fish.
①
Thanks, but fish doesn’t agree with me
②
Sorry, I can’t help
③
I don’t like fish
④
No, I can’t
【单选题】
The reason _________ I am writing this letter is to tell you about the meeting on Saturday.
①
because
②
why
③
for
④
as
【单选题】
Is that Mr Robert Lee?
①
Yes, Lee speaking
②
Hello, what do you want
③
Sorry, speaking
④
I don’t know
【单选题】
Hello, is that Shanghai Airlines?
①
Yes, can I help you?
②
Yes, what do you want?
③
Yes, you’re right
④
Yes, right number
【单选题】
May I see the menu, please?
①
That is the menu, sir
②
Yes, please go on
③
Here you are, sir
④
Of course, sir
【单选题】
__________ a teacher in a university, it is necessary to have at least a master’s degree.
①
To become
②
Become
③
One becomes
④
On becoming