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菌落总数及其含义？

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You want to take the backup of the USERS tablespace. It has a single data file of 900 MB. You have tape drives of 300 MB each. The SBT channel is configured for the RMAN. To accomplish the backup， you issued the following RMAN command： RMAN> BACKUP SECTION SIZE 300M TABLESPACE users； Which two statements are true regarding the execution of the above command？（）

A. The RMAN parallelizes the backup although the parallelism is not set for a channel.
B. The backup piece size will be limited to 300 M
C. The operation is accomplished using the default channel available.
D. Three channels for the tape drive must be configured by setting the parallelism to three.

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话说当时住持真人对洪太尉说道：“太尉不知，此殿中当初是祖老天师洞玄真人传下法符，嘱咐道：‘此殿内镇锁着三十六员天罡星，七十二座地煞星，共是一百单个魔君在里面。上立石碑，凿着龙章凤篆天符，镇住在此。若还放他出世，必恼下方生灵。’如今太尉放他走了，怎生是好？” 关于这段文字所属著作，下列说法正确的是（）

A. 是我国古代著名的长篇神魔小说
B. 其作者与曹雪芹生活在同一时期
C. “白帝城托孤”是书中的一个情节
D. 以北宋末年为故事背景

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处理逻辑

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绿荫树类（庭荫树类）

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