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【单选题】
单稳态触发器的暂态持续时间取决于( ) ,而与外触发信号的宽度无关。
A.
输出负载的类型
B.
电源的大小
C.
电容的充电时间
D.
触发信号的维持时间
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【单选题】卢瑟福对原子结构的描述哪项是不对的
A.
原子的正电荷均匀分布在整个原子球中,电子一个个嵌入其中
B.
原子中正电荷和原子质量集中在一个很少的体积内,电子绕核运动
C.
原子核式结构,原子核像太阳,电子像行星,故又被称为行星模式
D.
卢瑟福提出的原子模式结果当时还无法圆满解释原子内部稳定性问题
【单选题】What does the speaker say about the photographer?
A.
Frank shows common scenes in a vivid and deep way.
B.
Frank overlooks some commonplaces in the book.
C.
Frank focuses a little more on the people than the space.
D.
Frank is good at constructing the spaces for people.
【简答题】What does Frank plan to do right after graduation? 查看材料 A.Work as a programmer. B.Travel around the world. C.Start his own business.
【单选题】中国最古老的雅乐是由( )演奏。
A.
古筝
B.
编钟
C.
D.
古琴
【单选题】变压器的额定容量用S N 表示,单位为( )。
A.
VA 或kVA
B.
var 或kvar
C.
W或Kw
【单选题】Does Lisa agree with what Frank said about her understanding of the happiest people?
A.
Yes.
B.
No.
C.
Not mentioned.
【单选题】What does Frank not say about “postmodernism”?
A.
It’s difficult to say what it is.
B.
You can use it to describe lots of things.
C.
The word has been used for more than 50 years.
D.
Only young people are interested in it.
【单选题】What does Frank not say about “postmodernism”?
A.
It’s difficult to say what it is.
B.
You can use it to describe lots of things.
C.
Only young people are interested in it.
D.
The word has been used for more than 50 years.
【判断题】变压器容量的单位为W或kW。
A.
正确
B.
错误
【单选题】在OSI模型中,第N层和其上的N+1层的关系是:
A.
N层为N+1层提供服务
B.
N+1层将从N层接收的信息增了一个头
C.
N层利用N+1层提供的服务
D.
N层对N+1层没有任何作用
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