实体性贬值
Examine the description of the MARKS table: SUBJ1 and SUBJ2 indicate the marks obtained by a student in two subjects. Examine this SELECT statement based on the MARKS table: What is the result of the SELECT statement?（） [" The statement executes successfully and returns the student ID and sum of all marks for each student who obtained more than the average mark in each subject."," The statement returns an error at the SELECT clause."," The statement returns an error at the WHERE clause."," The statement returns an error at the ORDER BY clause."]
关键词广告就是（） ["页面广告","电子邮件广告","网站广告","搜索广告"]
做距离保护整定变压器变比试验时，加入的电压值为（）。 ["相间距离保护100V，接地距离保护100V","相间距离保护100V，接地距离保护60V","相间距离保护60V，接地距离保护100V"]
Which three operations can be performed as multipartition operations in Oracle?（） [" Merge partitions of a list partitioned table"," Drop partitions of a list partitioned table"," Coalesce partitions of a hash-partitioned global index."," Move partitions of a range-partitioned table"," Rename partitions of a range partitioned table"," Merge partitions of a reference partitioned index"]
硅酸盐的结构特点
