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
参考答案：C
Olkswagen believes it was worth sticking it out in China in the 1990s when the hopes of other foreign car makers were dashed.
A．flashed
B．lashed
C．smashed
D．splashed
故意改变书写速度伪装笔迹有哪几种？
