N．P．Suh系列实验
恶意透支
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?（） Place CDB1 in the mount stage and then the USERDATA tablespace offline in ACCOUNTS_PDb.。 Place CDB1 in the mount stage and issue the ALTER PLUGGABLE DATABASE accounts_pdb CLOSE IMMEDIATE command.。 Issue the ALTER PLUGGABLE DATABASE accounts_pdb RESTRICTED command.。 Take the USERDATA tablespace offline in ACCOUNTS_PDb.。
产生国际避税的原因有（）。 各国税收制度中对纳税人的纳税义务的规定不尽一致。 课税的范围和方式有区别。 运用税率上有差别。 税基上有差别。
铜鼻子安装时，原则上要求铜鼻子与铜排接触边的夹角成（）°。绝缘胶带的颜色要与导线的颜色一致。 30。 60。 90。 120。
软件需求规格说明书在软件开发中具有重要作用，但其作用不应该包括（）。
