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【单选题】
What does the minimize load database parameter mean when backing up a database?（）A.
RMAN will attempt to make the backup run as fast as possible without any IO limitations.
B.
RMAN will automatically restrict the number of channels in use to one.
C.
RMAN will spread the backup IO over the total duration stated in the backup command.
D.
RMAN will skip any datafile that currently is involved in an IO operation. RMAN will retry backing up the datafile later and an error will be raised at the end of the backup if the datafile cannot be backed up.
E.
Datafiles will be backed up; those having the lowest current number of IO operations will be backed up first.
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【单选题】下列自身免疫性疾病中不是由ll型超敏反应引起的是?
A.
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B.
重症肌无力
C.
毒性弥漫性甲状腺肿
D.
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E.
系统性红斑狼疮