磁盘或文件夹里事务日志保留空间为()MB。
A.40
B.20
C.10
D.30
参考答案:B
下列化学反应中,既属于离子反应又属于氧化还原反应的是( )
A.氢气在氧气中燃烧
B.锌粒与稀硫酸
C.硝酸银溶液与氯化钠溶液
D.红热木炭跟水蒸气反应
Mrs. Lackey was awakened by the ringing of the bedside phone 12 hours after her husband's boat had been ______ .
A.wrecked
B.collapsed
C.decayed
D.fired