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【单选题】
How to construct new feature space by PCA?A.
New feature space by PCA is constructed by choosing the most important features you think.
B.
New feature space by PCA is constructed by normalizing input data.
C.
New feature space by PCA is constructed by selecting features randomly.
D.
New feature space by PCA is constructed by eliminating the weak components to reduce the size of the data.
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