答案:B
A. DBMS
B. DB
C. DBS
D. DBA
A. GDS
B. 数据集市
C. BDS
D. ODS
A. HASH BY column_name
B. DISTRIBUTED BY column_name
C. DISTRIBUTING BY column_name
D. HASHED BY column_name
A. 过拟合
B. 欠拟合
C. 共线性
D. 模型复杂度过高
A. 996
B. 2333
C. 5020
D. 4957