教育的直观手段有（）、（）、（）三种。
纳税人通过合法的手段以纳税最优化为目的，在纳税决策中所做的决策称为（）。 税收。 避税。 节稅。 逃税。
交流母线B相的相色漆规定为（）。 黄。 绿。 红。
JZ-7型自动制动阀共有（）手柄作用位。 5个。 6个。 7个。 8个。
You execute this command to drop the ITEM table， which has the primary key referred in the ORDERS table：SQL> DROP TABLE scott.item CASCADE CONSTRAINTS PURGE； Which two statements are true about theeffect of the command（） No flashback is possible to bring back the ITEM table.。 The ORDERS table is dropped along with the ITEM table.。 The dependent referential integrity constraints in the ORDERS table are disabled.。 The dependent referential integrity constraints in the ORDERS table are removed.。 The table definition of the ITEM table and associated indexes are placed in the recycle bi。
A system has a mirrored data volume group that has a filesystem /data of 10 logical partitions.
How many physical partitions will the filesystem have？（）
