为了考虑安全性,每个教师只能存取自己讲授课程的学生成绩,为此DBA应创建()
A. 视图(view)
B. 索引(index)
C. 游标(cursor)
D. 表(table)
A great scientist once said that success was "two percent of ______ ,ninety--eight percent
A. inspiration
B. intuition
C. imagination
D. incentive
Many scientists ______ the new damage to the forests to be the result of higher levels of
A. resumed
B. perfumed
C. presumed
D. consumed