简述风土、市井小说的主要特征。
职工应当参加生育保险，由用人单位和个人按照国家规定共同缴纳生育保险费。
You use a recovery catalog for maintaining your database backups.You execute the following command:$rman TARGET / CATALOG rman / cat@catdbRMAN > BACKUP VALIDATE DATABASE ARCHIVELOG ALL;Which two statements are true?（） Corrupted blocks, if any, are repaired.。 Checks are performed for physical corruptions.。 Checks are performed for logical corruptions.。 Checks are performed to confirm whether all database files exist in correct locations。 Backup sets containing both data files and archive logs are created.。
You want to enforce a company’s business policy on several objects by using a singlepolicy function. Which two types of policies can be assigned to the policy_type argument in the dbms_rls.add_policy procedure to achieve the above objective？（） DBMS_RLS.STATIC。 DBMS_RLS.DYNAMIC。 DBMS_RLS.SHARED_STATIC。 DBMS_RLS.CONTEXT_SENSITIVE。 DBMS_RLS.SHARED_CONTEXT_SENSITIVE。
直接构成消费者生存的空间条件，可以促进或限制某些消费活动的进行，对消费者的消费行为有明显影响的外部环境因素是（）。 人口环境。 文化环境。 自然环境。 经济环境。
Which can appropriately be thrown by a programmer using Java SE technology to create a desktop application？（）
