对于消费者来说,习惯的作用有() 代替学习,缩短心理活动过程。 有利于进行消费管理。 习惯表示了适应。 习惯表现了对厂商的忠诚。 有利于厂商对消费者行为进行预测。
Evaluate the CREATE TABLE statement: CREATE TABLE products (product_id NUMBER (6) CONSTRAINT prod_id_pk PRIMARY KEY, product_name VARCHAR2 (15)); Which statement is true regarding the PROD_ID_PK constraint?() It would be created only if a unique index is manually created first.。 It would be created and would use an automatically created unique index.。 It would be created and would use an automatically created nonunique index.。 It would be created and remains in a disabled state because no index is specified in the command.。
边际站馈线接地排采用截面积不小于100mmx6mm铜板、孔数10个的铜排或采用截面积不小于()铜铁转换器。 100mmx6mm。 100mmx40mm。 60mmx10mm。 100mmx20mm。
You are performing a block media recovery on the tools01.dbf data file in the SALES database using RMAN. Which two statements are correct in this scenario?() You must ensure that the SALES database is mounted or open.。 You must restore a backup control file to perform a block media recovery.。 You must take the tools01.dbf data file offline before you start a block media recovery.。 You must put the database in NOARCHIVELOG mode to perform a block media recovery.。 You can perform only a complete media recovery of individual blocks, point-in-time recovery of individual data blocks is not supported.。
仪表刻度盘的符号及意义MvAr(),vAr()。
组织开展家庭美德和反家庭暴力宣传教育的是()。