The RECYCLEBIN parameter is set to ON for your database. You drop a table, PRODUCTS, from the SCOTT schema.Which two statements are true regarding the outcome of this action？ （）（Choose two)

A.FlashbackQuery

B.FlashbackDrop

C.FlashbackTable

D.FlashbackDatabase

E.TransactionProcessing

F.RecycleBin

A. All the related indexes and views are automatically dropped

B. The flashback drop feature can recover only the table structure

C. Only the related indexes are dropped whereas views are invalidated

D. The flashback drop feature can recover both the table structure and its data

e with the same name exists in the schema.You query RECYCLEBIN and find multiple entries for the SALES_EMP table as follows, You then issue the following statement to recover the table:SQL＞ FLASHBACK TABLE sales_emp TO BEFORE DROP;What would be the outcome of the precedent statement？（）

A. It retrieves the latest version of the table from the recycle bin

B. It retrieves the oldest version of the table from the recycle bin

C. It retrieves the version of the table for which undo information is available

D. It returns an error because the table name is not specified as per the names in the OBJECT_NAME column

A.print(odj.v1==odj.v2)会报错。

B.print(odj.v1)值为0。

C.print(odj.v1)值为100。

D.print(odj.v1==odj.v2)结果为False。

A.在launch中添加param

B.通过ROS的API来添加param

C.通过rosparam命令添加param

D.通过rosnode命令添加param

A.必须用@Param注解为每个参数都定义别名，不管多少

B.@Param注解可以定义多个别名

C.当方法包含多个参数，并且这些参数都应用在上时，就必须用@Param注解为这些参数取别名

D.@Param可以在类中使用

A.next

B.forward

C.include

D.param

A.print(odj.v1==odj.v2)会报错。

B.print(odj.v1)值为0。

C.print(odj.v1)值为100。

D.print(odj.v1==odj.v2)结果为False。