I can't go with you. I my homework. [ ]
A. do
B. am doing
C. is doing
D. doing
B
----_______ do the students go to school?
----It depends ________ where they live.
A.How; of
B.What; of
C.How; on
D.What; on
一个事务中所有对DB的操作是一个不可分割的操作序列,这个性质称为事务的______。
A.孤立性
B.独立性
C.原子性
D.隔离性