在并发操作中可能产生若于数据库的不一致性，除了丢失修改，不能重复读以外，还有()。

A．读脏数据

B．不可串行化

C．事物内部故障

D．活锁和死锁

The girl made a light of her disappointment at being too sick to go to the dance.

A．made light of

B．made no light

C．made interest

D．made a little