瓶装毒性气体危险特性警示标志底色是（）色。 黄。 红。 绿。 白。
Which three statements are true regarding the use of the Database Migration Assistant for Unicode(DMU)?（） A DBA can check specific tables with the DMU。 The database to be migrated must be opened read-only.。 The release of the database to be converted can be any release since 9.2.0.8.。 The DMU can report columns that are too long in the converted characterset.。 The DMU can report columns that are not represented in the converted characterset.。
《社会保险法》规定，县级以上人民政府应将社会保险事业纳入国民经济和社会发展规划。
在选择车辆调度形式的时，若采用区间车调度形式，则需要满足条件――路段客流差大于等于（）倍的计划车载客定额； 2。 2~4。 1.2~1.5。 1.5。
For an incomplete recovery， which four backup types can be used by Recovery Manager （RMAN） to restore data files？（） RMAN image copies.。 RMAN database backups.。 RMAN tablespace backups.。 User-managed backups placed in the flash recovery area.。 User-managed backups that have been cataloged with RMAN.。 User-managed data file backups for which the pull path name is specified.。
奥苏贝尔的认知结构迁移理论认为，学生认知结构中的哪几个变量会对学习迁移产生直接的影响？（）
