答案:A
答案:A
A. 预测建模
B. 聚类分析
C. 关联分析
D. 异常检测
A. count(cid)
B. count(distinct cid)
C. count(name)
D. count(*)
A. IFAR,BoEing
B. IFAR,C3
C. BoEing,IFAR
D. BoEing,C3
A. ALTER
B. CREATE
C. UPDATE
D. INSERT
A. f = open ("test.txt", "read")
B. f = open("r","test. txt")
C. f = open ("test.txt", "r")
D. f = open("read","te st.txt")
A. 数据主体
B. 外部数据提供方
C. 数据需求部门
D. 技术实施部门
A. select * from teacher where tage between 30 and 40
B. select * from teacher where tage >= 30 and tage <= 40
C. select * from teacher where tage in ('30','40')
D. select * form teacher where tage > 30 and tage < 40
A. 数据清洗
B. 特征缩放/归一化
C. 训练模型
D. 交叉验证
A. truncate table t0;
B. delete from t0;
C. truncate from t0;
D. delete table t0;