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【简答题】
试给出数据通信系统的模型并说明其主要组成构件的作用。
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举一反三
【单选题】听力原文：M: How does Frank come out of the experiment? I heard that he had trouble with the procedure. W: It's true. He did have some difficulties at first, and later his experiment couldn't have turned o...
A.
Frank's experiment was difficult at first.
B.
Frank didn't succeed in his experiment.
C.
Frank has turned his experiment down.
D.
Frank had trouble all through the procedures.
【单选题】执行下列程序段后,程序的运行结果为( )。 s = 1 For i = 1 To 3 For j = 0 To i - 1 s = s + s * j Next j Print s; Next i
A.
2 1
B.
1 2 12
C.
1 2
D.
2 2 12
【单选题】—______does Frank Frank play compiter games ? —Twice a week
A.
How long
B.
How much
C.
How often
【简答题】糖尿病现代治疗的5个要点,分别为:( )、( )、( )、( )、( )。
【多选题】你应该在 meta 标签里放什么,以下表述错误的是
A.
在 meta 标签的 keywords 中放满关键字列表，把重要的关键字放在 meta 标签的 description 中
B.
忽略 meta 标签，搜索引擎不用这些
C.
在 meta 标签的 description 中写上你网站的简短描述，在 meta 标签的 keywords 放上最重要的关键字
D.
在 meta 标签的 keywords 放上最重要的关键字，忽略 meta 标签的 description
【单选题】执行下列程序段后,程序的运行结果为( )。 s = 1 For i = 1 To 3 For j = 0 To i - 1 s = s + s * j Next j Print s; Next i
A.
1 2
B.
2 1
C.
2 2 12
D.
1 2 12
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