数据预处理包括数据的规范化、()、归一化。
参考答案:非量纲化
My cousin in Beijing University at present, after which she will work in Beijing.
A.educated
B.has been educated
C.is being educated
D.was educated
无线电频率、卫星轨道位置、电信网码号等电信资源是无偿使用的。