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【单选题】
反相比例的反馈类型是( )A.
电压串联负反馈
B.
A、电压并联负反馈
C.
电流串联负反馈
D.
电流并联负反馈
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反馈参考答案：
举一反三
【单选题】According to the second paragraph, the formation of the Atlantic Ocean is the example of ______.
A.
spreading contacts
B.
the influence of volcanic eruptions
C.
converging contacts
D.
transform. contacts
【简答题】Topic31 Session1 根据中文意思，匹配对应的英语单词。A. 概念模型B. 设计视图C. 句法层D. 任务层E. 物理组件F. 语义层G. 设备层H. 空间布局层I. 用户界面J. 通信组件K. 击键层L. 心智模型M. 命令语言语法N. 概念组件O. 语言视图P. 认知视图
【单选题】According the author what is the difference between the ocean and a watch?
A.
Opening a watch is simple. But getting inside every part of the ocean isn’t so easy.
B.
One can find out the problem of a watch just by looking at it. But as to the ocean, he can’t.
C.
Not like the ocean a watch is made to function just by a complicated system of gears.
D.
As long as the watch keeps ticking, you will know what time it is. The ocean is not the case.
【单选题】According to the traditional view of the origin of the ocean basins, which of the following is sufficient to move the continental plates?
A.
Spreading of ocean trenches.
B.
Movements of min-ocean ridges.
C.
Sinking of ocean basins.
D.
Differences in temperature under oceans and continents.
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