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【单选题】
对于下面的一段python程序，计算的是向量之间的import numpy as npx=np.random.random(5)y=np.random.random(5)sim=np.dot(x,y)/(np.linalg.norm(x)*np.linalg.norm(y))A.
马修相关系数
B.
余弦相似度
C.
距离
D.
欧式相似度
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