【多选题】Which two are true concerning a multitenant container database with three pluggable database?()
A.
All administration tasks must be done to a specific pluggable database.
B.
The pluggable databases increase patching time.
C.
The pluggable databases reduce administration effort.
D.
The pluggable databases are patched together.
E.
Pluggable databases are only used for database consolidation.
【单选题】About Database, which of the following is WRONG?
A.
Relational model is an obsolete database model now
B.
DBMS means database-management system.
C.
A query is a request to see information from a database that matches specific criteria
D.
A record is a collection of related fields in a database and also called a row
【单选题】一些成年人体内( )活性过低,大量食用乳及其制品可能引起乳糖不耐受的发生,出现腹泻胀气等不适症状。
【单选题】Which statement is true about a whole consistent database backup on a database running in ARCHIVELOGmode()
A.
The backup will consist of used data blocks only.
B.
The database must be shut down to accomplish the backup.
C.
The backup can be accomplished without shutting down the database.
D.
The backup will contain all database files that have never been backed up
【单选题】一些成年人体内( )活性过低,大量食用乳及其制品可能引起乳糖不耐受的发生
【简答题】证明 e(φ)×e1(φ)=k; (2)证明 e(φ+α)=e(φ)cos α+e1(φ)sin α.
【单选题】I would rather apologize to my boss for being late without an explanation than ______ an excuse.
【单选题】一些成年人体内()活性过低,大量食用乳及其制品可能引起乳糖不耐受的发生
【简答题】已知A(r,θ,φ)=r 2 sinφe r +2rcosθe θ +sinθe φ ,求 . (ρ,φ,z)为柱面坐标,(r,θ,φ)为球面坐标.