发起行发起的支付业务需要撤销的,应通过大额支付系统发送撤销请求。国家处理中心未清算资金的,立即办理撤销;已清算资金的,不能撤销。
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Your multitenant container database, CDB1, is running in ARCHIVELOG mode and has two pluggable databases, HR_PDB and ACCOUNTS_PDB. An RMAN backup exists for the database. You issue the command to open ACCOUNTS_PDB and find that the USERDATA.DBF data file for the default permanent tablespace USERDATA belonging to ACCOUNTS_PDB is corrupted. What should you do before executing the commands to restore and recover the data file in ACCOUNTS_PDB?()
A. Place CDB1 in the mount stage and then the USERDATA tablespace offline in ACCOUNTS_PDb.
B. Place CDB1 in the mount stage and issue the ALTER PLUGGABLE DATABASE accounts_pdb CLOSE IMMEDIATE command.
C. Issue the ALTER PLUGGABLE DATABASE accounts_pdb RESTRICTED command.
D. Take the USERDATA tablespace offline in ACCOUNTS_PDb.
穿越轨底的各杆件及其连接销、开口销,距轨底的净距离应不大于()mm,杆件无碰枕木、石渣的可能。
灌输法体现了教师中心主义。
A. 正确
B. 错误