单项选择题

What is the functionality of the 'Allow modifications of customized objects' check box in the OracleWorkflow Builder dialog box that is displayed from the Help menu? （）(Choose two.)

A.B.
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YouaremaintainingtheSALESdatabaseofacompany.YouhaveneverbackeduptheUSERStablespacethatiscurrentlyofflinE.OnSunday，youissuedthefollowingcommands：CONFIGUREDEFAULTDEVICETYPETOsbt；CONFIGUREBACKUPOPTIMIZATIONON；CONFIGURERETENTIONPOLICYTOREDUNDANCY3；FromMondaytoSaturday，youperformedthefollowingactions：DayActionMondayBACKUPDATABASETuesdayBACKUPDATABASEWednesdayBACKUPDATABASEThursdayBACKUPDATABASEFridayBACKUPDATABASESaturdayBACKUPDATABASEHowmanytimeswillthebackupoftheUSERStablespacebeperformed？（）
A.YouhaveneverbackeduptheUSERStablespacethatiscurrentlyofflinE.OnSunday，youissuedthefollowingcommands：
单项选择题
在茎孔和铰合线之间常有一个空隙，常呈三角形，称为三角孔，有时会被一或两片骨板填满，称为三角板或者三角双板。在______腕足动物里，常有三角孔。
A．无洞贝类
B．石燕类
C．穿孔贝类
D．舌形贝类
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