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【简答题】
根据短文内容判断正误,正确的在括号里填A, 错误的在括号里填B。 Sometimes people say that they see strange flying objects (物体) high up in the sky. People call these strange objects “Unidentified Flying Objects (UFOs)”. Dennis Bardens wrote an article. In it, he told us that he once saw a UFO himself. He had dinner one night with a friend near Tripoli, Libya. After dinner Dennis with his friend walked across a yard (院子) to his room. He noticed that the “moon” looked strange that night. But it wasn’t the moon. He saw the object’s light was moving. It seemed to be an object like a big plate. In some ways it looked like smoke with light on it. But it wasn’t smoke because it didn’t change its shape (形状). When the object was nearer, he noticed that its bottom (底部的) part was brighter than the top. The bottom part was yellow and the top was red. Then the object suddenly turned away and left, moving very fast. On a later day, Dennis talked to other people about it, and he found some people also saw it. They all described (描述) it in the same way. 小题1:Dennis Bardens wrote an article about a UFO. 小题2:The object looked like smoke because it often changed its shape. 小题3:Dennis saw some people in the object looking at him. 小题4:The object’s bottom part was yellow and the top was red. 小题5:Dennis was the only man who saw the UFO that night.
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A.
对实验内容进行对比
B.
提升自身理解力和判断力
C.
分析实验是否合理
D.
将信息转换为知识
【单选题】如图示,一束自然光自空气射向一块平板玻璃,设入射角等于布儒斯特角i0,则在界面2的反射光( )。
A.
是自然光
B.
是部分偏振光
C.
是完全偏振光且光矢量的振动方向垂直于入射面
D.
是完全偏振光且光矢量的振动方向平行于入射面
【单选题】中国革命统一战线的基础是
A.
工人阶级同知识分子联盟
B.
工农联盟
C.
工、农、城市小资和民族资产阶级四个阶级联盟
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共产党的领导
【单选题】一束自然光自空气射向一块平板玻璃(如图),设入射角等于布儒斯特角i0,则在界面2的反射光( )。
A.
是自然光
B.
是完全偏振光且光矢量的振动方向垂直于入射面
C.
是完全偏振光且光矢量的振动方向平行于入射面
D.
是部分偏振光
【单选题】已知序列x[k]={2,1,-2,1;k=0,1,2,3},则该序列的自相关函数R x [n]为:
A.
{2,-3,-2,10,-2,-3,2; n=-3,-2,-1,0,1,2,3}
B.
{2,-3,-2,10,2,-3,2; n=-3,-2,-1,0,1,2,3}
C.
{-2,-3,2,8,2,-3,-2; n=-3,-2,-1,0,1,2,3}
D.
{-2,-3,2,10,-2,-3,-2; n=-3,-2,-1,0,1,2,3}
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A.
将信息转换成知识
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分析实验是否合理
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对实验内容进行对比
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提升自身的理解力和判断力
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A.
0
B.
3
C.
7
D.
6
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