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【单选题】
Ex.9-1 Listen to the following short dialogues and choose the appropriate answers.A.
AI is everywhere.
B.
These devices are smart.
C.
Not everybody knows about AI.
D.
Human life cannot do without AI.
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举一反三
【单选题】There are four shi ( 是 ) sentences below in Chinese in brackets, and their translation as well. Which shi ( 是 ) is translated into “be”? ( )
A.
Purple belonged to the emperor because of its associations with the north star.
B.
It is a closed residence with only one gate leading to the outside
C.
The Forbidden City stands as the largest complex of palace buildings anywhere in the world
D.
Hong Kong-Zhuhai-Macao Bridge, the world ’ s longest sea bridge, was opened on 23.
【单选题】下列关于数的描述中,不正确的是( )。
A.
众数(Mode)是出现频率最高的数值。
B.
中位数(Median)是位于中间的值。
C.
平均数(Average)是平均后的值。
D.
标准差(Standard Deviation)描述了众数、中位数和平均数的离散程度
【单选题】Mr. Hitlon was a tall and thin man. He seemed weak and could not hurt anybody. He killed several enemy soldiers when he was in the army. And he was hurt in the war and had to return to the town where ...
A.
the factory needed a gatekeeper
B.
he had killed some enemy soldiers
C.
he was too weak to stay in the army
D.
the enemy hurt him in the war
【简答题】“中国梦”的实质就是国家富强、民族复兴、( )幸福。
【单选题】下列关于主组分分析的说法中不正确的是（）
A.
主组分分析是在统计特征基础上的多维正交线性变换。多波段图像经过这种变换后产生出一组新的组分图像，组分图像的数目只能等于原来的波段数，但组分图像之间消除了相关性。（组分图像的数目可以等于或少于原来的波段数。）
B.
主组分分析的目的是将原来各波段图像中的有用信息集中到数目尽可能少的新的组分图像中，并使各组分图像互不相关，即各自包含不同的地物信息，大大减少总的数据量，便
C.
从几何意义上，相当于空间坐标的旋转。主组分变换，相当于把原来的数据变换到一个新的坐标系统。
D.
主组分变换多用于多变量数据压缩，即把原来的多变量数据在信息损失最小的前提下，变换为尽可能少的新的变量，以减少数据的维数。
【简答题】“中国梦”的实质就是( )富强、民族复兴、人民幸福。
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