参考答案: D
详细解析:
数据库中的恢复机制负责检测故障，并将数据库恢复到故障发生前的状态。
The（ ）scheme in a database system is responsible for the detection of failures and for the restoration of the database to a state that existed before the occurrence of the failure.
A. query
B. test
C. check
D. recovery
参考答案: D
详细解析:
数据库中的恢复机制负责检测故障，并将数据库恢复到故障发生前的状态。