【多选题】【消耗次数：1】
网络协议的三要素为（ ）
①
语法
②
语义
③
规则
④
同步
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【简答题】
网络协议三要素为[填空]、语义、同步
【简答题】
网络协议三要素为语法、语义、[填空]
【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】
Joan replied, “I _________ many European countries and seen lots of places and people.
①
have been to have gone to go to
②
have gone to
③
go to
④
goes to
【单选题】
I ___remember to send my mother some flowers. Its her birthday tomorrow.
①
must
②
have to
③
could
【单选题】
Ihaven got___to do this evening. Would you like to go to see a film?
①
something
②
anything
③
nothing
【单选题】
-“When shall we meet again next week?”-“______________ day is possible. It’s no problem with me.”
①
Either
②
Neither
③
Every
④
Any
【单选题】
His grandfather is very healthy. He _______drinks _______smokes.
①
both, and
②
no,but
③
either, or
④
neither, nor
【单选题】
We havent seen such a beautiful film ______.
①
since four years
②
for the past four years
③
four years ago
④
from the past four years
【单选题】
Get up! Mary. Tom has _____called you three times this morning.
①
yet
②
already
③
never
④
seldom
【单选题】
Mr. Hilton is not good at music. Neither ______his children.
①
is
②
was
③
were
④
are